v4.6.0

Upgrade to js-tokens@1.0.0

.babelrc

@@ -1,5 +1,6 @@
 {
   "experimental": true,
   "playground": true,
-  "loose": true
+  "loose": true,
+  "blacklist": ["es6.tailCall"]
 }

.editorconfig

@@ -5,6 +5,7 @@ insert_final_newline = true
 charset = utf-8
 trim_trailing_whitespace = true
 insert_final_newline = true
+end_of_line = lf
 
 [*.{js,json}]
 indent_style = space

.eslintignore

@@ -0,0 +1 @@
+src/babel/transformation/templates

.eslintrc

@@ -0,0 +1,22 @@
+{
+  "parser": "babel-eslint",
+  "rules": {
+    "strict": 0,
+    "no-underscore-dangle": 0,
+    "no-unused-vars": 0,
+    "curly": 0,
+    "no-multi-spaces": 0,
+    "key-spacing": 0,
+    "no-return-assign": 0,
+    "consistent-return": 0,
+    "no-shadow": 0,
+    "no-comma-dangle": 0,
+    "no-use-before-define": 0,
+    "no-empty": 0,
+    "new-parens": 0,
+    "no-cond-assign": 0
+  },
+  "env": {
+    "node": true
+  }
+}

.gitignore

@@ -13,3 +13,4 @@ dist
 .package.json
 packages/babel-runtime/*.js
 packages/babel-runtime/regenerator/*.js
+lib

.jscsrc

@@ -1,58 +0,0 @@
-{
-  "excludeFiles": ["lib/babel/transformation/templates"],
-  "disallowSpacesInNamedFunctionExpression": {
-    "beforeOpeningRoundBrace": true
-  },
-  "requireSpacesInAnonymousFunctionExpression": {
-    "beforeOpeningRoundBrace": true
-  },
-  "requireSpacesInAnonymousFunctionExpression": {
-    "beforeOpeningRoundBrace": true
-  },
-  "disallowSpacesInFunctionDeclaration": {
-    "beforeOpeningRoundBrace": true
-  },
-  "disallowSpacesInsideArrayBrackets": true,
-  "disallowSpacesInsideParentheses": true,
-  "disallowSpaceAfterObjectKeys": true,
-  "disallowSpaceAfterPrefixUnaryOperators": true,
-  "disallowSpaceBeforePostfixUnaryOperators": true,
-  "disallowSpaceBeforeBinaryOperators": [
-    ","
-  ],
-  "disallowMixedSpacesAndTabs": true,
-  "disallowTrailingWhitespace": true,
-  "disallowYodaConditions": true,
-  "disallowKeywords": [ "with" ],
-  "disallowMultipleLineBreaks": true,
-  "requireSpaceBeforeBlockStatements": true,
-  "requireParenthesesAroundIIFE": true,
-  "requireSpacesInConditionalExpression": true,
-  "requireBlocksOnNewline": 1,
-  "requireCommaBeforeLineBreak": true,
-  "requireSpaceBeforeBinaryOperators": true,
-  "requireSpaceAfterBinaryOperators": true,
-  "requireLineFeedAtFileEnd": true,
-  "requireCapitalizedConstructors": true,
-  "requireSpacesInForStatement": true,
-  "requireCurlyBraces": [
-    "do"
-  ],
-  "requireSpaceAfterKeywords": [
-    "if",
-    "else",
-    "for",
-    "while",
-    "do",
-    "switch",
-    "case",
-    "return",
-    "try",
-    "catch",
-    "typeof",
-    "function"
-  ],
-  "validateLineBreaks": "LF",
-  "validateQuoteMarks": "\"",
-  "validateIndentation": 2
-}

.jshintignore

@@ -1 +0,0 @@
-lib/babel/transformation/templates

.jshintrc

@@ -1,27 +0,0 @@
-{
-  "esnext": true,
-  "indent": 2,
-  "freeze": true,
-  "validthis": true,
-  "camelcase": true,
-  "unused": true,
-  "eqnull": true,
-  "newcap": true,
-  "supernew": true,
-  "noyield": true,
-  "evil": true,
-  "node": true,
-  "boss": true,
-  "expr": true,
-  "undef": true,
-  "maxparams": 5,
-  "maxdepth": 4,
-
-  "globals": {
-    "window": true,
-    "suite": true,
-    "set": true,
-    "before": true,
-    "bench": true
-  }
-}

.npmignore

@@ -13,3 +13,4 @@ CHANGELOG.md
 coverage
 vendor
 packages
+src

CHANGELOG.md

@@ -13,6 +13,105 @@ _Note: Gaps between patch versions are faulty/broken releases._
 
 See [CHANGELOG - 6to5](CHANGELOG-6to5.md) for the pre-4.0.0 version changelog.
 
+## 4.5.5
+
+ * **Polish**
+  * Delete old extensions when overriding them in `babel/register`.
+
+## 4.5.3
+
+ * **Bug Fix**
+  * Fix whitelisting logic for helper build script.
+
+## 4.5.2
+
+ * **New Feature**
+  * `returnUsedHelpers` option and add whitelist to `buildHelpers`.
+ * **Bug Fix**
+  * Fix function arity on self referencing inferred named functions.
+ * **Internal**
+  * Bump `acorn-babel`.
+  * Start converting source to ES6...
+
+## 4.5.1
+
+**Babel now compiles itself!**
+
+![holy shit](http://gifsec.com/wp-content/uploads/GIF/2014/03/OMG-GIF_2.gif)
+
+## 4.5.0
+
+ * **New Feature**
+  * Add `.babelrc` support.
+ * **Bug Fix**
+  * Move use strict directives to the module formatter bodies.
+ * **Internal**
+  * Make default `bin/babel` behaviour to ignore non-compilable files and add a `--copy-files` flag to revert to the old behaviour.
+
+## 4.4.6
+
+ * **Bug Fix**
+  * Fix extending a class expression with no methods/only constructor. Thanks [@neVERberleRfellerER](https://github.com/neVERberleRfellerER)!
+  * Allow `MemberExpression` as a valid `left` of `ForOfStatement`.
+ * **Polish**
+  * Throw an error when people try and transpile code with the `@jsx React.DOM` pragma as it conflicts with the custom jsx constructo method detection.
+  * Crawl all comments for `@jsx` pragma.
+ * **Internal**
+  * Upgrade `chalk`.
+  * Upgrade `core-js`.
+
+## 4.4.5
+
+ * **Internal**
+  * Remove function self reference optimisation.
+
+## 4.4.4
+
+ * **Bug Fix**
+  * Handle inferred function ids to be reassigned and deopt to a slower but working equivalent.
+  * Don't unpack array patterns that have more elements than their right hand array expression.
+ * **Polish**
+  * Improve syntax highlighting in the code frame. Thanks [@lydell](https://github.com/lydell)!
+ * **Internal**
+  * Upgrade `acorn-babel`.
+
+## 4.4.3
+
+ * **Bug Fix**
+  * Fix `for...of` iterator break returns being duplicated.
+  * Only call `return` on the iterator if it exists.
+ * **Internal**
+  * Rename `selfContained` transformer to `runtime`.
+
+## 4.4.2
+
+ * **New Feature**
+  * Add `moduleId` option for specifying a custom module id.
+
+## 4.4.0
+
+ * **New Feature**
+  * `/*** @jsx NAMESPACE **/` comments are now honored by the `react` transformer.
+  * `getModuleName` option.
+  * Infer function expression names. Thanks [@RReverser](https://github.com/RReverser)!
+ * **Bug Fix**
+  * Add proper control flow for tail recursion optimisation.
+ * **Internal**
+  * Remove useless `format` options and move the `format.compact` option to `format`.
+ * **Polish**
+  * Newline handling of the code generator has been heavily improved.
+  * Code generator now deopts whitespace if the input size is >100KB.
+
+## 4.3.0
+
+ * **Breaking Change**
+  * Remove `commonStandard` module formatter and make it the default behaviour of all the strict module formatters.
+
+## 4.2.1
+
+ * **Polish**
+  * Add auxiliary comment to let scoping closure flow control.
+
 ## 4.2.0
 
  * **Polish**

CONTRIBUTING.md

@@ -4,12 +4,42 @@ Contributions are always welcome, no matter how large or small. Before
 contributing, please read the
 [code of conduct](https://github.com/babel/babel/blob/master/CODE_OF_CONDUCT.md).
 
-**NOTE:** Please do not send pull requests that fix linting issues. It's highly
-likely that they've already been fixed by the time it's submitted and it just
-pollutes the git tree.
-
 ## Developing
 
+#### Setup
+
+```sh
+$ git clone https://github.com/babel/babel
+$ cd babel
+$ make bootstrap
+```
+
+Then you need to run:
+
+```sh
+$ make watch-core
+```
+
+This will compile babel and then sit in the background and on file modification
+recompile the necessary files.
+
+#### Running tests
+
+You can run tests via:
+
+```sh
+$ make test
+```
+
+This will usually take around two minutes as it's compiling the entire
+[test262](https://github.com/tc39/test262) test suite and validating it's AST.
+This is mostly overkill and you can limit the tests to a select few by directly
+running them with `mocha`:
+
+```sh
+$ mocha test/transformation.js
+```
+
 #### Workflow
 
 * Fork the repository
@@ -18,8 +48,7 @@ pollutes the git tree.
 * Link your forked clone (`npm link`)
 * Develop your changes ensuring you're fetching updates from upstream often
 * Ensure the test are passing (`make test`)
-* Create new pull request explaining your proposed change or reference an issue
-  in your commit message
+* Create new pull request explaining your proposed change or reference an issue in your commit message
 
 #### Code Standards
 
@@ -43,11 +72,3 @@ pollutes the git tree.
  * **Declaration**
    * No unused variables
    * No pollution of global variables and prototypes
-
-## Testing
-
-    $ make test
-
-## Linting
-
-    $ make lint

Makefile

@@ -4,21 +4,21 @@ UGLIFY_CMD = node_modules/uglify-js/bin/uglifyjs
 #UGLIFY_CMD = node_modules/uglify-js/bin/uglifyjs --mangle sort
 JSHINT_CMD = node_modules/jshint/bin/jshint
 MOCHA_CMD = node_modules/mocha/bin/_mocha
-JSCS_CMD = node_modules/jscs/bin/jscs
 BABEL_CMD = node_modules/babel/bin/babel
 
 export NODE_ENV = test
 
-.PHONY: clean test test-cov test-clean lint test-travis test-simple test-all test-browser publish build bootstrap publish-core publish-runtime build-core watch-core
+.PHONY: clean test test-cov test-clean test-travis test-simple test-all test-browser publish build bootstrap publish-core publish-runtime build-core watch-core
 
 build-core:
-	#node $(BABEL_CMD) src --out-dir lib
+	node $(BABEL_CMD) src --out-dir lib --copy-files
 
 watch-core:
-	#node $(BABEL_CMD) src --out-dir lib --watch
+	node $(BABEL_CMD) src --out-dir lib --watch --copy-files
 
 build:
 	mkdir -p dist
+	make build-core
 
 	node tools/cache-templates
 
@@ -36,14 +36,10 @@ build:
 clean:
 	rm -rf coverage templates.json test/tmp dist
 
-lint:
-	$(JSHINT_CMD) --reporter node_modules/jshint-stylish/stylish.js lib bin
-	$(JSCS_CMD) lib bin
-
 test-clean:
 	rm -rf test/tmp
 
-test: lint
+test:
 	$(MOCHA_CMD)
 	make test-clean
 
@@ -61,7 +57,7 @@ test-cov:
 	export SIMPLE_BABEL_TESTS=1; \
 	node $(ISTANBUL_CMD) $(MOCHA_CMD) --
 
-test-travis: build-core bootstrap
+test-travis: bootstrap build
 	node $(ISTANBUL_CMD) $(MOCHA_CMD) --
 	if test -n "$$CODECLIMATE_REPO_TOKEN"; then codeclimate < coverage/lcov.info; fi
 
@@ -119,5 +115,5 @@ publish-core:
 bootstrap:
 	npm install
 	git submodule update --init
-	cd vendor/regenerator; npm install
-	cd vendor/compat-table; npm install object-assign
+	cd vendor/regenerator && npm install
+	cd vendor/compat-table && npm install object-assign

README.md

@@ -1,5 +1,7 @@
 <p align="center">
-  <img alt="babel" src="https://raw.githubusercontent.com/babel/logo/master/logo.png" width="546">
+  <a href="https://babeljs.io/">
+    <img alt="babel" src="https://raw.githubusercontent.com/babel/logo/master/logo.png" width="546">
+  </a>
 </p>
 
 <p align="center">
@@ -7,6 +9,9 @@
 </p>
 
 <p align="center">
-  For more information view the <a href="https://babeljs.io/">documentation</a>. For
-  support visit the <a href="https://gitter.im/babel/babel">gitter room</a>.
+  For questions and support please visit the <a href="https://gitter.im/babel/babel">gitter room</a> before creating an issue.
+</p>
+
+<p align="center">
+  For documentation and website issues please visit the <a href="https://github.com/babel/babel.github.io">babel.github.io</a> repo.
 </p>

bin/_babel-node

@@ -50,7 +50,10 @@ var _eval = function (code, filename) {
     experimental: program.experimental,
     playground: program.playground
   }).code;
-  return vm.runInThisContext(code, filename);
+
+  return vm.runInThisContext(code, {
+    filename: filename
+  });
 };
 
 if (program.eval || program.print) {

bin/babel-minify

@@ -1,7 +0,0 @@
-#!/usr/bin/env node
-
-var opts = require("./babel").opts;
-opts.optional = (opts.optional || []).concat("minification");
-opts.format = {
-  compact: true
-};

bin/babel/dir.js

@@ -43,7 +43,7 @@ module.exports = function (commander, filenames, opts) {
         var src = path.join(dirname, filename);
         if (util.canCompile(filename)) {
           write(src, filename);
-        } else {
+        } else if (commander.copyFiles) {
           outputFileSync(path.join(commander.outDir, filename), fs.readFileSync(src));
         }
       });
@@ -64,7 +64,11 @@ module.exports = function (commander, filenames, opts) {
       _.each(["add", "change"], function (type) {
         watcher.on(type, function (filename) {
           var relative = path.relative(dirname, filename) || filename;
-          write(filename, relative);
+          try {
+            if (util.canCompile(filename)) write(filename, relative);
+          } catch (err) {
+            console.error(err.stack);
+          }
         });
       });
     });

bin/babel/file.js

@@ -119,7 +119,11 @@ module.exports = function (commander, filenames) {
       }).on("all", function (type, filename) {
         if (type === "add" || type === "change") {
           console.log(type, filename);
-          walk();
+          try {
+            walk();
+          } catch (err) {
+            console.error(err.stack);
+          }
         }
       });
     }

bin/babel/index.js

@@ -15,6 +15,7 @@ commander.option("-r, --external-helpers", "Replace helpers with references to a
 commander.option("-e, --experimental", "Enable experimental support for proposed ES7 features");
 commander.option("-p, --playground", "Enable playground support");
 
+commander.option("-c, --compact [mode]", "When set to \"auto\" compact is `true` when the input size exceeds 100KB. (auto|true|false)", "auto");
 commander.option("-m, --modules [modules]", "Module formatter type to use [common]", "common");
 commander.option("-l, --whitelist [whitelist]", "Whitelist of transformers to ONLY use", util.list);
 commander.option("-b, --blacklist [blacklist]", "Blacklist of transformers to NOT use", util.list);
@@ -27,6 +28,7 @@ commander.option("-M, --module-ids", "Insert module id in modules", false);
 commander.option("-R, --react-compat", "Makes the react transformer produce pre-v0.12 code");
 commander.option("--keep-module-id-extensions", "Keep extensions when generating module ids", false);
 commander.option("-a, --auxiliary-comment [comment]", "Comment text to prepend to all auxiliary code");
+commander.option("-D, --copy-files", "When compiling a directory copy over non-compilable files");
 
 commander.on("--help", function () {
   var outKeys = function (title, obj) {
@@ -113,20 +115,16 @@ exports.opts = {
   optional:               commander.optional,
   comments:               !commander.removeComments,
   modules:                commander.modules,
+  compact:                commander.compact,
   loose:                  commander.loose
 };
 
-setTimeout(function () {
-  // this is just a hack to give `babel-minify` and other files including this
-  // time to modify `exports.opts`
+var fn;
 
-  var fn;
+if (commander.outDir) {
+  fn = require("./dir");
+} else {
+  fn = require("./file");
+}
 
-  if (commander.outDir) {
-    fn = require("./dir");
-  } else {
-    fn = require("./file");
-  }
-
-  fn(commander, filenames, exports.opts);
-}, 0);
+fn(commander, filenames, exports.opts);

bin/babel/util.js

@@ -1,10 +1,11 @@
-var readdir = require("fs-readdir-recursive");
-var index   = require("./index");
-var babel   = require("../../lib/babel/api/node");
-var util    = require("../../lib/babel/util");
-var path    = require("path");
-var fs      = require("fs");
-var _       = require("lodash");
+var resolveRc = require("../../lib/babel/api/register/resolve-rc");
+var readdir   = require("fs-readdir-recursive");
+var index     = require("./index");
+var babel     = require("../../lib/babel/api/node");
+var util      = require("../../lib/babel/util");
+var path      = require("path");
+var fs        = require("fs");
+var _         = require("lodash");
 
 exports.readdirFilter = function (filename) {
   return readdir(filename).filter(function (filename) {
@@ -23,18 +24,9 @@ exports.addSourceMappingUrl = function (code, loc) {
 exports.transform = function (filename, code, opts) {
   opts = _.defaults(opts || {}, index.opts);
   opts.filename = filename;
+  resolveRc(filename, opts);
 
-  var result;
-  try {
-    result = babel.transform(code, opts);
-  } catch (e) {
-    if (e instanceof SyntaxError) {
-      console.error("SyntaxError:", e.message);
-      process.exit(1);
-    } else {
-      throw e;
-    }
-  }
+  var result = babel.transform(code, opts);
   result.filename = filename;
   result.actual = code;
   return result;

bin/deprecated/6to5-minify

@@ -1,3 +0,0 @@
-#!/usr/bin/env node
-console.error("`6to5-minify` has been renamed to `babel-minify`");
-require("../babel-minify");

doc/index.md

@@ -1 +0,0 @@
-See [babel.github.io/docs](https://github.com/babel/babel.github.io/tree/master/docs).

lib/babel/api/node.js

@@ -1,58 +0,0 @@
-"use strict";
-
-var isFunction = require("lodash/lang/isFunction");
-var transform  = require("../transformation");
-var util       = require("../util");
-var fs         = require("fs");
-
-exports.version = require("../../../package").version;
-
-exports.buildExternalHelpers = require("../build-external-helpers");
-
-exports.types = require("../types");
-
-exports.register = function (opts) {
-  var register = require("./register/node");
-  if (opts != null) register(opts);
-  return register;
-};
-
-exports.polyfill = function () {
-  require("../polyfill");
-};
-
-exports.canCompile = util.canCompile;
-
-// do not use this - this is for use by official maintained babel plugins
-exports._util = util;
-
-exports.transform = transform;
-
-exports.transformFile = function (filename, opts, callback) {
-  if (isFunction(opts)) {
-    callback = opts;
-    opts = {};
-  }
-
-  opts.filename = filename;
-
-  fs.readFile(filename, function (err, code) {
-    if (err) return callback(err);
-
-    var result;
-
-    try {
-      result = transform(code, opts);
-    } catch (err) {
-      return callback(err);
-    }
-
-    callback(null, result);
-  });
-};
-
-exports.transformFileSync = function (filename, opts) {
-  opts = opts || {};
-  opts.filename = filename;
-  return transform(fs.readFileSync(filename), opts);
-};

lib/babel/api/register/browser.js

@@ -1,7 +0,0 @@
-"use strict";
-
-// required to safely use babel/register within a browserify codebase
-
-module.exports = function () {};
-
-require("../../polyfill");

lib/babel/build-helpers.js

@@ -1,13 +0,0 @@
-var File = require("./transformation/file");
-var util = require("./util");
-var each = require("lodash/collection/each");
-var t    = require("./types");
-
-module.exports = function (body, namespace) {
-  each(File.helpers, function (name) {
-    var key = t.identifier(t.toIdentifier(name));
-    body.push(t.expressionStatement(
-      t.assignmentExpression("=", t.memberExpression(namespace, key), util.template(name))
-    ));
-  });
-};

lib/babel/generation/buffer.js

@@ -1,167 +0,0 @@
-"use strict";
-
-module.exports = Buffer;
-
-var repeating = require("repeating");
-var trimRight = require("trim-right");
-var isBoolean = require("lodash/lang/isBoolean");
-var includes  = require("lodash/collection/includes");
-var isNumber  = require("lodash/lang/isNumber");
-
-function Buffer(position, format) {
-  this.position = position;
-  this._indent  = format.indent.base;
-  this.format   = format;
-  this.buf      = "";
-}
-
-Buffer.prototype.get = function () {
-  return trimRight(this.buf);
-};
-
-Buffer.prototype.getIndent = function () {
-  if (this.format.compact || this.format.concise) {
-    return "";
-  } else {
-    return repeating(this.format.indent.style, this._indent);
-  }
-};
-
-Buffer.prototype.indentSize = function () {
-  return this.getIndent().length;
-};
-
-Buffer.prototype.indent = function () {
-  this._indent++;
-};
-
-Buffer.prototype.dedent = function () {
-  this._indent--;
-};
-
-Buffer.prototype.semicolon = function () {
-  this.push(";");
-};
-
-Buffer.prototype.ensureSemicolon = function () {
-  if (!this.isLast(";")) this.semicolon();
-};
-
-Buffer.prototype.rightBrace = function () {
-  this.newline(true);
-  this.push("}");
-};
-
-Buffer.prototype.keyword = function (name) {
-  this.push(name);
-  this.space();
-};
-
-Buffer.prototype.space = function () {
-  if (this.format.compact) return;
-
-  if (this.buf && !this.isLast([" ", "\n"])) {
-    this.push(" ");
-  }
-};
-
-Buffer.prototype.removeLast = function (cha) {
-  if (!this.isLast(cha)) return;
-
-  this.buf = this.buf.substr(0, this.buf.length - 1);
-  this.position.unshift(cha);
-};
-
-Buffer.prototype.newline = function (i, removeLast) {
-  if (this.format.compact || this.format.concise) {
-    this.space();
-    return;
-  }
-
-  removeLast = removeLast || false;
-
-  if (isNumber(i)) {
-    if (this.endsWith("{\n")) i--;
-    if (this.endsWith(repeating("\n", i > 0 ? i : 0))) return;
-
-    while (i--) {
-      this._newline(removeLast);
-    }
-    return;
-  }
-
-  if (isBoolean(i)) {
-    removeLast = i;
-  }
-
-  this._newline(removeLast);
-};
-
-Buffer.prototype._newline = function (removeLast) {
-  if (removeLast && this.isLast("\n")) this.removeLast("\n");
-
-  this.removeLast(" ");
-
-  // remove whitespace if last character was a newline
-  this._removeSpacesAfterLastNewline();
-  this._push("\n");
-};
-
-/**
- * If buffer ends with a newline and some spaces after it, trim those spaces.
- */
-Buffer.prototype._removeSpacesAfterLastNewline = function () {
-  var lastNewlineIndex = this.buf.lastIndexOf("\n");
-  if (lastNewlineIndex === -1)
-    return;
-
-  var index = this.buf.length - 1;
-  while (index > lastNewlineIndex) {
-    if (this.buf[index] !== " ") {
-      break;
-    }
-
-    index--;
-  }
-
-  if (index === lastNewlineIndex) {
-    this.buf = this.buf.substring(0, index + 1);
-  }
-};
-
-Buffer.prototype.push = function (str, noIndent) {
-  if (this._indent && !noIndent && str !== "\n") {
-    // we have an indent level and we aren't pushing a newline
-    var indent = this.getIndent();
-
-    // replace all newlines with newlines with the indentation
-    str = str.replace(/\n/g, "\n" + indent);
-
-    // we've got a newline before us so prepend on the indentation
-    if (this.isLast("\n")) str = indent + str;
-  }
-
-  this._push(str);
-};
-
-Buffer.prototype._push = function (str) {
-  this.position.push(str);
-  this.buf += str;
-};
-
-Buffer.prototype.endsWith = function (str) {
-  var d = this.buf.length - str.length;
-  return d >= 0 && this.buf.lastIndexOf(str) === d;
-};
-
-Buffer.prototype.isLast = function (cha, shouldTrimRight) {
-  var buf = this.buf;
-  if (shouldTrimRight) buf = trimRight(buf);
-  var last = buf[buf.length - 1];
-
-  if (Array.isArray(cha)) {
-    return includes(cha, last);
-  } else {
-    return cha === last;
-  }
-};

lib/babel/generation/generators/template-literals.js

@@ -1,32 +0,0 @@
-"use strict";
-
-var each = require("lodash/collection/each");
-
-exports.TaggedTemplateExpression = function (node, print) {
-  print(node.tag);
-  print(node.quasi);
-};
-
-exports.TemplateElement = function (node) {
-  this._push(node.value.raw);
-};
-
-exports.TemplateLiteral = function (node, print) {
-  this.push("`");
-
-  var quasis = node.quasis;
-  var self   = this;
-  var len    = quasis.length;
-
-  each(quasis, function (quasi, i) {
-    print(quasi);
-
-    if (i + 1 < len) {
-      self.push("${ ");
-      print(node.expressions[i]);
-      self.push(" }");
-    }
-  });
-
-  this._push("`");
-};

lib/babel/generation/index.js

@@ -1,361 +0,0 @@
-"use strict";
-
-module.exports = function (ast, opts, code) {
-  var gen = new CodeGenerator(ast, opts, code);
-  return gen.generate();
-};
-
-module.exports.CodeGenerator = CodeGenerator;
-
-var detectIndent = require("detect-indent");
-var Whitespace   = require("./whitespace");
-var repeating    = require("repeating");
-var SourceMap    = require("./source-map");
-var Position     = require("./position");
-var Buffer       = require("./buffer");
-var extend       = require("lodash/object/extend");
-var merge        = require("lodash/object/merge");
-var each         = require("lodash/collection/each");
-var n            = require("./node");
-var t            = require("../types");
-
-function CodeGenerator(ast, opts, code) {
-  opts = opts || {};
-
-  this.comments = ast.comments || [];
-  this.tokens   = ast.tokens || [];
-  this.format   = CodeGenerator.normalizeOptions(code, opts);
-  this.opts     = opts;
-  this.ast      = ast;
-
-  this.whitespace = new Whitespace(this.tokens, this.comments);
-  this.position   = new Position;
-  this.map        = new SourceMap(this.position, opts, code);
-  this.buffer     = new Buffer(this.position, this.format);
-}
-
-each(Buffer.prototype, function (fn, key) {
-  CodeGenerator.prototype[key] = function () {
-    return fn.apply(this.buffer, arguments);
-  };
-});
-
-CodeGenerator.normalizeOptions = function (code, opts) {
-  var style = "  ";
-  if (code) {
-    var indent = detectIndent(code).indent;
-    if (indent && indent !== " ") style = indent;
-  }
-
-  return merge({
-    parentheses: true,
-    comments: opts.comments == null || opts.comments,
-    compact: false,
-    concise: false,
-    indent: {
-      adjustMultilineComment: true,
-      style: style,
-      base: 0
-    }
-  }, opts.format || {});
-};
-
-CodeGenerator.generators = {
-  templateLiterals: require("./generators/template-literals"),
-  comprehensions:   require("./generators/comprehensions"),
-  expressions:      require("./generators/expressions"),
-  statements:       require("./generators/statements"),
-  playground:       require("./generators/playground"),
-  classes:          require("./generators/classes"),
-  methods:          require("./generators/methods"),
-  modules:          require("./generators/modules"),
-  types:            require("./generators/types"),
-  flow:             require("./generators/flow"),
-  base:             require("./generators/base"),
-  jsx:              require("./generators/jsx")
-};
-
-each(CodeGenerator.generators, function (generator) {
-  extend(CodeGenerator.prototype, generator);
-});
-
-CodeGenerator.prototype.generate = function () {
-  var ast = this.ast;
-
-  this.print(ast);
-
-  var comments = [];
-  each(ast.comments, function (comment) {
-    if (!comment._displayed) comments.push(comment);
-  });
-  this._printComments(comments);
-
-  return {
-    map:  this.map.get(),
-    code: this.buffer.get()
-  };
-};
-
-CodeGenerator.prototype.buildPrint = function (parent) {
-  var self = this;
-
-  var print = function (node, opts) {
-    return self.print(node, parent, opts);
-  };
-
-  print.sequence = function (nodes, opts) {
-    opts = opts || {};
-    opts.statement = true;
-    return self.printJoin(print, nodes, opts);
-  };
-
-  print.join = function (nodes, opts) {
-    return self.printJoin(print, nodes, opts);
-  };
-
-  print.list = function (items, opts) {
-    opts = opts || {};
-
-    var sep = opts.separator || ", ";
-    if (self.format.compact) sep = ",";
-    opts.separator = sep;
-
-    print.join(items, opts);
-  };
-
-  print.block = function (node) {
-    return self.printBlock(print, node);
-  };
-
-  print.indentOnComments = function (node) {
-    return self.printAndIndentOnComments(print, node);
-  };
-
-  return print;
-};
-
-CodeGenerator.prototype.print = function (node, parent, opts) {
-  if (!node) return "";
-
-  if (parent && parent._compact) {
-    node._compact = true;
-  }
-
-  var oldConcise = this.format.concise;
-  if (node._compact) {
-    this.format.concise = true;
-  }
-
-  var self = this;
-
-  opts = opts || {};
-
-  var newline = function (leading) {
-    if (!opts.statement && !n.isUserWhitespacable(node, parent)) {
-      return;
-    }
-
-    var lines = 0;
-
-    if (node.start != null && !node._ignoreUserWhitespace) {
-      // user node
-      if (leading) {
-        lines = self.whitespace.getNewlinesBefore(node);
-      } else {
-        lines = self.whitespace.getNewlinesAfter(node);
-      }
-    } else {
-      // generated node
-      if (!leading) lines++; // always include at least a single line after
-
-      var needs = n.needsWhitespaceAfter;
-      if (leading) needs = n.needsWhitespaceBefore;
-      lines += needs(node, parent);
-
-      // generated nodes can't add starting file whitespace
-      if (!self.buffer.get()) lines = 0;
-    }
-
-    self.newline(lines);
-  };
-
-  if (this[node.type]) {
-    var needsNoLineTermParens = n.needsParensNoLineTerminator(node, parent);
-    var needsParens           = needsNoLineTermParens || n.needsParens(node, parent);
-
-    if (needsParens) this.push("(");
-    if (needsNoLineTermParens) this.indent();
-
-    this.printLeadingComments(node, parent);
-
-    newline(true);
-
-    if (opts.before) opts.before();
-    this.map.mark(node, "start");
-
-    this[node.type](node, this.buildPrint(node), parent);
-
-    if (needsNoLineTermParens) {
-      this.newline();
-      this.dedent();
-    }
-    if (needsParens) this.push(")");
-
-    this.map.mark(node, "end");
-    if (opts.after) opts.after();
-
-    newline(false);
-
-    this.printTrailingComments(node, parent);
-  } else {
-    throw new ReferenceError("unknown node of type " + JSON.stringify(node.type) + " with constructor " + JSON.stringify(node && node.constructor.name));
-  }
-
-  this.format.concise = oldConcise;
-};
-
-CodeGenerator.prototype.printJoin = function (print, nodes, opts) {
-  if (!nodes || !nodes.length) return;
-
-  opts = opts || {};
-
-  var self = this;
-  var len  = nodes.length;
-
-  if (opts.indent) self.indent();
-
-  each(nodes, function (node, i) {
-    print(node, {
-      statement: opts.statement,
-      after: function () {
-        if (opts.iterator) {
-          opts.iterator(node, i);
-        }
-
-        if (opts.separator && i < len - 1) {
-          self.push(opts.separator);
-        }
-      }
-    });
-  });
-
-  if (opts.indent) self.dedent();
-};
-
-CodeGenerator.prototype.printAndIndentOnComments = function (print, node) {
-  var indent = !!node.leadingComments;
-  if (indent) this.indent();
-  print(node);
-  if (indent) this.dedent();
-};
-
-CodeGenerator.prototype.printBlock = function (print, node) {
-  if (t.isEmptyStatement(node)) {
-    this.semicolon();
-  } else {
-    this.push(" ");
-    print(node);
-  }
-};
-
-CodeGenerator.prototype.generateComment = function (comment) {
-  var val = comment.value;
-  if (comment.type === "Line") {
-    val = "//" + val;
-  } else {
-    val = "/*" + val + "*/";
-  }
-  return val;
-};
-
-CodeGenerator.prototype.printTrailingComments = function (node, parent) {
-  this._printComments(this.getComments("trailingComments", node, parent));
-};
-
-CodeGenerator.prototype.printLeadingComments = function (node, parent) {
-  this._printComments(this.getComments("leadingComments", node, parent));
-};
-
-CodeGenerator.prototype.getComments = function (key, node, parent) {
-  if (t.isExpressionStatement(parent)) {
-    return [];
-  }
-
-  var comments = [];
-  var nodes    = [node];
-  var self     = this;
-
-  if (t.isExpressionStatement(node)) {
-    nodes.push(node.argument);
-  }
-
-  each(nodes, function (node) {
-    comments = comments.concat(self._getComments(key, node));
-  });
-
-  return comments;
-};
-
-CodeGenerator.prototype._getComments = function (key, node) {
-  return (node && node[key]) || [];
-};
-
-CodeGenerator.prototype._printComments = function (comments) {
-  if (this.format.compact) return;
-  if (!this.format.comments) return;
-  if (!comments || !comments.length) return;
-
-  var self = this;
-
-  each(comments, function (comment) {
-    var skip = false;
-
-    // find the original comment in the ast and set it as displayed
-    each(self.ast.comments, function (origComment) {
-      if (origComment.start === comment.start) {
-        // comment has already been output
-        if (origComment._displayed) skip = true;
-
-        origComment._displayed = true;
-        return false;
-      }
-    });
-
-    if (skip) return;
-
-    // whitespace before
-    self.newline(self.whitespace.getNewlinesBefore(comment));
-
-    var column = self.position.column;
-    var val    = self.generateComment(comment);
-
-    if (column && !self.isLast(["\n", " ", "[", "{"])) {
-      self._push(" ");
-      column++;
-    }
-
-    //
-
-    if (comment.type === "Block" && self.format.indent.adjustMultilineComment) {
-      var offset = comment.loc.start.column;
-      if (offset) {
-        var newlineRegex = new RegExp("\\n\\s{1," + offset + "}", "g");
-        val = val.replace(newlineRegex, "\n");
-      }
-
-      var indent = Math.max(self.indentSize(), column);
-      val = val.replace(/\n/g, "\n" + repeating(" ", indent));
-    }
-
-    if (column === 0) {
-      val = self.getIndent() + val;
-    }
-
-    //
-
-    self._push(val);
-
-    // whitespace after
-    self.newline(self.whitespace.getNewlinesAfter(comment));
-  });
-};

lib/babel/generation/node/index.js

@@ -1,112 +0,0 @@
-"use strict";
-
-module.exports = Node;
-
-var whitespace = require("./whitespace");
-var parens     = require("./parentheses");
-var t          = require("../../types");
-var each       = require("lodash/collection/each");
-var some       = require("lodash/collection/some");
-
-var find = function (obj, node, parent) {
-  if (!obj) return;
-  var result;
-
-  var types = Object.keys(obj);
-  for (var i = 0; i < types.length; i++) {
-    var type = types[i];
-
-    if (t.is(type, node)) {
-      var fn = obj[type];
-      result = fn(node, parent);
-      if (result != null) break;
-    }
-  }
-
-  return result;
-};
-
-function Node(node, parent) {
-  this.parent = parent;
-  this.node   = node;
-}
-
-Node.isUserWhitespacable = function (node) {
-  return t.isUserWhitespacable(node);
-};
-
-Node.needsWhitespace = function (node, parent, type) {
-  if (!node) return 0;
-
-  if (t.isExpressionStatement(node)) {
-    node = node.expression;
-  }
-
-  var lines = find(whitespace[type].nodes, node, parent);
-  if (lines) return lines;
-
-  each(find(whitespace[type].list, node, parent), function (expr) {
-    lines = Node.needsWhitespace(expr, node, type);
-    if (lines) return false;
-  });
-  return lines || 0;
-};
-
-Node.needsWhitespaceBefore = function (node, parent) {
-  return Node.needsWhitespace(node, parent, "before");
-};
-
-Node.needsWhitespaceAfter = function (node, parent) {
-  return Node.needsWhitespace(node, parent, "after");
-};
-
-Node.needsParens = function (node, parent) {
-  if (!parent) return false;
-
-  if (t.isNewExpression(parent) && parent.callee === node) {
-    if (t.isCallExpression(node)) return true;
-
-    var hasCall = some(node, function (val) {
-      return t.isCallExpression(val);
-    });
-    if (hasCall) return true;
-  }
-
-  return find(parens, node, parent);
-};
-
-Node.needsParensNoLineTerminator = function (node, parent) {
-  if (!parent) return false;
-
-  // no comments
-  if (!node.leadingComments || !node.leadingComments.length) {
-    return false;
-  }
-
-  if (t.isYieldExpression(parent) || t.isAwaitExpression(parent)) {
-    return true;
-  }
-
-  if (t.isContinueStatement(parent) || t.isBreakStatement(parent) ||
-      t.isReturnStatement(parent) || t.isThrowStatement(parent)) {
-    return true;
-  }
-
-  return false;
-};
-
-each(Node, function (fn, key) {
-  Node.prototype[key] = function () {
-    // Avoid leaking arguments to prevent deoptimization
-    var args = new Array(arguments.length + 2);
-
-    args[0] = this.node;
-    args[1] = this.parent;
-
-    for (var i = 0; i < args.length; i++) {
-      args[i + 2] = arguments[i];
-    }
-
-    return Node[key].apply(null, args);
-  };
-});

lib/babel/generation/node/whitespace.js

@@ -1,84 +0,0 @@
-"use strict";
-
-var t        = require("../../types");
-var each     = require("lodash/collection/each");
-var map      = require("lodash/collection/map");
-var isNumber = require("lodash/lang/isNumber");
-
-exports.before = {
-  nodes: {
-    Property: function (node, parent) {
-      if (parent.properties[0] === node) {
-        return 1;
-      }
-    },
-
-    SpreadProperty: function (node, parent) {
-      return exports.before.nodes.Property(node, parent);
-    },
-
-    SwitchCase: function (node, parent) {
-      if (parent.cases[0] === node) {
-        return 1;
-      }
-    },
-
-    CallExpression: function (node) {
-      if (t.isFunction(node.callee)) {
-        return 1;
-      }
-    }
-  }
-};
-
-exports.after = {
-  nodes: {
-    LogicalExpression: function (node) {
-      return t.isFunction(node.left) || t.isFunction(node.right);
-    },
-
-    AssignmentExpression: function (node) {
-      if (t.isFunction(node.right)) {
-        return 1;
-      }
-    }
-  },
-
-  list: {
-    VariableDeclaration: function (node) {
-      return map(node.declarations, "init");
-    },
-
-    ArrayExpression: function (node) {
-      return node.elements;
-    },
-
-    ObjectExpression: function (node) {
-      return node.properties;
-    }
-  }
-};
-
-each({
-  Function: 1,
-  Class: 1,
-  For: 1,
-  ArrayExpression: { after: 1 },
-  ObjectExpression: { after: 1 },
-  SwitchStatement: 1,
-  IfStatement: { before: 1 },
-  CallExpression: { after: 1 },
-  Literal: { after: 1 }
-}, function (amounts, type) {
-  if (isNumber(amounts)) {
-    amounts = { after: amounts, before: amounts };
-  }
-
-  each([type].concat(t.FLIPPED_ALIAS_KEYS[type] || []), function (type) {
-    each(amounts, function (amount, key) {
-      exports[key].nodes[type] = function () {
-        return amount;
-      };
-    });
-  });
-});

lib/babel/generation/position.js

@@ -1,29 +0,0 @@
-"use strict";
-
-module.exports = Position;
-
-function Position() {
-  this.line = 1;
-  this.column = 0;
-}
-
-Position.prototype.push = function (str) {
-  for (var i = 0; i < str.length; i++) {
-    if (str[i] === "\n") {
-      this.line++;
-      this.column = 0;
-    } else {
-      this.column++;
-    }
-  }
-};
-
-Position.prototype.unshift = function (str) {
-  for (var i = 0; i < str.length; i++) {
-    if (str[i] === "\n") {
-      this.line--;
-    } else {
-      this.column--;
-    }
-  }
-};

lib/babel/generation/source-map.js

@@ -1,56 +0,0 @@
-"use strict";
-
-module.exports = SourceMap;
-
-var sourceMap = require("source-map");
-var t         = require("../types");
-
-function SourceMap(position, opts, code) {
-  this.position = position;
-  this.opts     = opts;
-
-  if (opts.sourceMap) {
-    this.map = new sourceMap.SourceMapGenerator({
-      file: opts.sourceMapName,
-      sourceRoot: opts.sourceRoot
-    });
-
-    this.map.setSourceContent(opts.sourceFileName, code);
-  } else {
-    this.map = null;
-  }
-}
-
-SourceMap.prototype.get = function () {
-  var map = this.map;
-  if (map) {
-    return map.toJSON();
-  } else {
-    return map;
-  }
-};
-
-SourceMap.prototype.mark = function (node, type) {
-  var loc = node.loc;
-  if (!loc) return; // no location info
-
-  var map = this.map;
-  if (!map) return; // no source map
-
-  if (t.isProgram(node) || t.isFile(node)) return; // illegal mapping nodes
-
-  var position = this.position;
-
-  var generated = {
-    line: position.line,
-    column: position.column
-  };
-
-  var original = loc[type];
-
-  map.addMapping({
-    source: this.opts.sourceFileName,
-    generated: generated,
-    original: original
-  });
-};

lib/babel/generation/whitespace.js

@@ -1,113 +0,0 @@
-"use strict";
-
-module.exports = Whitespace;
-
-var sortBy = require("lodash/collection/sortBy");
-
-/**
- * Returns `i`th number from `base`, continuing from 0 when `max` is reached.
- * Useful for shifting `for` loop by a fixed number but going over all items.
- *
- * @param {Number} i Current index in the loop
- * @param {Number} base Start index for which to return 0
- * @param {Number} max Array length
- * @returns {Number} shiftedIndex
- */
-function getLookupIndex(i, base, max) {
-  i += base;
-
-  if (i >= max)
-    i -= max;
-
-  return i;
-}
-
-function Whitespace(tokens, comments) {
-  this.tokens = sortBy(tokens.concat(comments), "start");
-  this.used   = {};
-
-  // Profiling this code shows that while generator passes over it, indexes
-  // returned by `getNewlinesBefore` and `getNewlinesAfter` are always increasing.
-
-  // We use this implementation detail for an optimization: instead of always
-  // starting to look from `this.tokens[0]`, we will start `for` loops from the
-  // previous successful match. We will enumerate all tokens—but the common
-  // case will be much faster.
-
-  this._lastFoundIndex = 0;
-}
-
-Whitespace.prototype.getNewlinesBefore = function (node) {
-  var startToken;
-  var endToken;
-  var tokens = this.tokens;
-  var token;
-
-  for (var j = 0; j < tokens.length; j++) {
-    // optimize for forward traversal by shifting for loop index
-    var i = getLookupIndex(j, this._lastFoundIndex, this.tokens.length);
-    token = tokens[i];
-
-    // this is the token this node starts with
-    if (node.start === token.start) {
-      startToken = tokens[i - 1];
-      endToken = token;
-
-      this._lastFoundIndex = i;
-      break;
-    }
-  }
-
-  return this.getNewlinesBetween(startToken, endToken);
-};
-
-Whitespace.prototype.getNewlinesAfter = function (node) {
-  var startToken;
-  var endToken;
-  var tokens = this.tokens;
-  var token;
-
-  for (var j = 0; j < tokens.length; j++) {
-    // optimize for forward traversal by shifting for loop index
-    var i = getLookupIndex(j, this._lastFoundIndex, this.tokens.length);
-    token = tokens[i];
-
-    // this is the token this node ends with
-    if (node.end === token.end) {
-      startToken = token;
-      endToken = tokens[i + 1];
-
-      this._lastFoundIndex = i;
-      break;
-    }
-  }
-
-  if (endToken && endToken.type.type === "eof") {
-    return 1;
-  } else {
-    var lines = this.getNewlinesBetween(startToken, endToken);
-    if (node.type === "Line" && !lines) {
-      // line comment
-      return 1;
-    } else {
-      return lines;
-    }
-  }
-};
-
-Whitespace.prototype.getNewlinesBetween = function (startToken, endToken) {
-  if (!endToken || !endToken.loc) return 0;
-
-  var start = startToken ? startToken.loc.end.line : 1;
-  var end   = endToken.loc.start.line;
-  var lines = 0;
-
-  for (var line = start; line < end; line++) {
-    if (typeof this.used[line] === "undefined") {
-      this.used[line] = true;
-      lines++;
-    }
-  }
-
-  return lines;
-};

lib/babel/helpers/code-frame.js

@@ -1,78 +0,0 @@
-// syntax highlighting based on https://github.com/dominictarr/ansi-highlight by the fantastic Dominic Tarr
-
-var repeating = require("repeating");
-var tokenize  = require("js-tokenizer");
-var chalk     = require("chalk");
-
-var defs = {
-  string1:  "red",
-  string2:  "red",
-  punct:    ["white", "bold"],
-  curly:    "green",
-  parens:   ["blue", "bold"],
-  square:   ["yellow"],
-  name:     "white",
-  keyword:  ["cyan"],
-  number:   "magenta",
-  regexp:   "magenta",
-  comment1: "grey",
-  comment2: "grey"
-};
-
-var highlight = function (text) {
-  var colorize = function (str, col) {
-    if (!col) return str;
-
-    if (Array.isArray(col)) {
-      col.forEach(function (col) {
-        str = chalk[col](str);
-      });
-    } else {
-      str = chalk[col](str);
-    }
-    return str;
-  };
-
-  return tokenize(text, true).map(function (str) {
-    var type = tokenize.type(str);
-    return colorize(str, defs[type]);
-  }).join("");
-};
-
-module.exports = function (lines, lineNumber, colNumber) {
-  colNumber = Math.max(colNumber, 0);
-
-  if (chalk.supportsColor) {
-    lines = highlight(lines);
-  }
-
-  lines = lines.split(/\r\n|[\n\r\u2028\u2029]/);
-
-  var start = Math.max(lineNumber - 3, 0);
-  var end   = Math.min(lines.length, lineNumber + 3);
-  var width = (end + "").length;
-
-  if (!lineNumber && !colNumber) {
-    start = 0;
-    end = lines.length;
-  }
-
-  return "\n" + lines.slice(start, end).map(function (line, i) {
-    var curr = i + start + 1;
-
-    var gutter = curr === lineNumber ? "> " : "  ";
-
-    var sep = curr + repeating(" ", width + 1);
-    gutter += sep + "| ";
-
-    var str = gutter + line;
-
-    if (colNumber && curr === lineNumber) {
-      str += "\n";
-      str += repeating(" ", gutter.length - 2);
-      str += "|" + repeating(" ", colNumber) + "^";
-    }
-
-    return str;
-  }).join("\n");
-};

lib/babel/transformation/file.js

@@ -1,464 +0,0 @@
-"use strict";
-
-module.exports = File;
-
-var sourceMapToComment = require("source-map-to-comment");
-var shebangRegex       = require("shebang-regex");
-var isFunction         = require("lodash/lang/isFunction");
-var transform          = require("./index");
-var generate           = require("../generation");
-var defaults           = require("lodash/object/defaults");
-var includes           = require("lodash/collection/includes");
-var assign             = require("lodash/object/assign");
-var parse              = require("../helpers/parse");
-var Scope              = require("../traversal/scope");
-var slash              = require("slash");
-var util               = require("../util");
-var path               = require("path");
-var each               = require("lodash/collection/each");
-var t                  = require("../types");
-
-function File(opts) {
-  this.dynamicImportedNoDefault = [];
-  this.dynamicImportIds         = {};
-  this.dynamicImported          = [];
-  this.dynamicImports           = [];
-
-  this.dynamicData      = {};
-  this.data             = {};
-
-  this.lastStatements   = [];
-  this.opts             = this.normalizeOptions(opts);
-  this.ast              = {};
-
-  this.buildTransformers();
-}
-
-File.helpers = [
-  "inherits",
-  "defaults",
-  "prototype-properties",
-  "apply-constructor",
-  "tagged-template-literal",
-  "tagged-template-literal-loose",
-  "interop-require",
-  "to-array",
-  "to-consumable-array",
-  "sliced-to-array",
-  "object-without-properties",
-  "has-own",
-  "slice",
-  "bind",
-  "define-property",
-  "async-to-generator",
-  "interop-require-wildcard",
-  "typeof",
-  "extends",
-  "get",
-  "set",
-  "class-call-check",
-  "object-destructuring-empty",
-  "temporal-undefined",
-  "temporal-assert-defined",
-  "tail-call"
-];
-
-File.validOptions = [
-  "filename",
-  "filenameRelative",
-  "blacklist",
-  "whitelist",
-  "loose",
-  "optional",
-  "modules",
-  "sourceMap",
-  "sourceMapName",
-  "sourceFileName",
-  "sourceRoot",
-  "moduleRoot",
-  "moduleIds",
-  "comments",
-  "reactCompat",
-  "keepModuleIdExtensions",
-  "code",
-  "ast",
-  "format",
-  "playground",
-  "experimental",
-  "resolveModuleSource",
-  "externalHelpers",
-  "auxiliaryComment",
-
-  // these are used by plugins
-  "ignore",
-  "only",
-  "extensions",
-  "accept"
-];
-
-File.prototype.normalizeOptions = function (opts) {
-  opts = assign({}, opts);
-
-  for (var key in opts) {
-    if (key[0] !== "_" && File.validOptions.indexOf(key) < 0) {
-      throw new ReferenceError("Unknown option: " + key);
-    }
-  }
-
-  defaults(opts, {
-    keepModuleIdExtensions: false,
-    resolveModuleSource:    null,
-    externalHelpers:        false,
-    auxilaryComment:        "",
-    experimental:           false,
-    reactCompat:            false,
-    playground:             false,
-    whitespace:             true,
-    moduleIds:              false,
-    blacklist:              [],
-    whitelist:              [],
-    sourceMap:              false,
-    optional:               [],
-    comments:               true,
-    filename:               "unknown",
-    modules:                "common",
-    loose:                  [],
-    code:                   true,
-    ast:                    true
-  });
-
-  // normalize windows path separators to unix
-  opts.filename = slash(opts.filename);
-  if (opts.sourceRoot) {
-    opts.sourceRoot = slash(opts.sourceRoot);
-  }
-
-  opts.basename = path.basename(opts.filename, path.extname(opts.filename));
-
-  opts.blacklist = util.arrayify(opts.blacklist);
-  opts.whitelist = util.arrayify(opts.whitelist);
-  opts.optional  = util.arrayify(opts.optional);
-  opts.loose     = util.arrayify(opts.loose);
-
-  if (includes(opts.loose, "all") || includes(opts.loose, true)) {
-    opts.loose = Object.keys(transform.transformers);
-  }
-
-  defaults(opts, {
-    moduleRoot: opts.sourceRoot
-  });
-
-  defaults(opts, {
-    sourceRoot: opts.moduleRoot
-  });
-
-  defaults(opts, {
-    filenameRelative: opts.filename
-  });
-
-  defaults(opts, {
-    sourceFileName: opts.filenameRelative,
-    sourceMapName:  opts.filenameRelative
-  });
-
-  if (opts.playground) {
-    opts.experimental = true;
-  }
-
-  if (opts.externalHelpers) {
-    this.set("runtimeIdentifier", t.identifier("babelHelpers"));
-  }
-
-  opts.blacklist = transform._ensureTransformerNames("blacklist", opts.blacklist);
-  opts.whitelist = transform._ensureTransformerNames("whitelist", opts.whitelist);
-  opts.optional  = transform._ensureTransformerNames("optional", opts.optional);
-  opts.loose     = transform._ensureTransformerNames("loose", opts.loose);
-
-  if (opts.reactCompat) {
-    opts.optional.push("reactCompat");
-    console.error("The reactCompat option has been moved into the optional transformer " +
-                  "`reactCompat` - backwards compatibility will be removed in v4.0.0");
-  }
-
-  var ensureEnabled = function (key) {
-    var namespace = transform.transformerNamespaces[key];
-    if (namespace === "es7") opts.experimental = true;
-    if (namespace === "playground") opts.playground = true;
-  };
-
-  each(opts.whitelist, ensureEnabled);
-  each(opts.optional, ensureEnabled);
-
-  return opts;
-};
-
-File.prototype.isLoose = function (key) {
-  return includes(this.opts.loose, key);
-};
-
-File.prototype.buildTransformers = function () {
-  var file = this;
-
-  var transformers = {};
-
-  var secondaryStack = [];
-  var stack = [];
-
-  each(transform.transformers, function (transformer, key) {
-    var pass = transformers[key] = transformer.buildPass(file);
-
-    if (pass.canRun(file)) {
-      stack.push(pass);
-
-      if (transformer.secondPass) {
-        secondaryStack.push(pass);
-      }
-
-      if (transformer.manipulateOptions) {
-        transformer.manipulateOptions(file.opts, file);
-      }
-    }
-  });
-
-  this.transformerStack = stack.concat(secondaryStack);
-  this.transformers = transformers;
-};
-
-File.prototype.debug = function (msg) {
-  var parts = this.opts.filename;
-  if (msg) parts += ": " + msg;
-  util.debug(parts);
-};
-
-File.prototype.getModuleFormatter = function (type) {
-  var ModuleFormatter = isFunction(type) ? type : transform.moduleFormatters[type];
-
-  if (!ModuleFormatter) {
-    var loc = util.resolve(type);
-    if (loc) ModuleFormatter = require(loc);
-  }
-
-  if (!ModuleFormatter) {
-    throw new ReferenceError("Unknown module formatter type " + JSON.stringify(type));
-  }
-
-  return new ModuleFormatter(this);
-};
-
-File.prototype.parseShebang = function (code) {
-  var shebangMatch = shebangRegex.exec(code);
-
-  if (shebangMatch) {
-    this.shebang = shebangMatch[0];
-
-    // remove shebang
-    code = code.replace(shebangRegex, "");
-  }
-
-  return code;
-};
-
-File.prototype.set = function (key, val) {
-  return this.data[key] = val;
-};
-
-File.prototype.setDynamic = function (key, fn) {
-  this.dynamicData[key] = fn;
-};
-
-File.prototype.get = function (key) {
-  var data = this.data[key];
-  if (data) {
-    return data;
-  } else {
-    var dynamic = this.dynamicData[key];
-    if (dynamic) {
-      return this.set(key, dynamic());
-    }
-  }
-};
-
-File.prototype.addImport = function (source, name, noDefault) {
-  name = name || source;
-  var id = this.dynamicImportIds[name];
-
-  if (!id) {
-    id = this.dynamicImportIds[name] = this.scope.generateUidIdentifier(name);
-
-    var specifiers = [t.importSpecifier(t.identifier("default"), id)];
-    var declar = t.importDeclaration(specifiers, t.literal(source));
-    declar._blockHoist = 3;
-
-    this.dynamicImported.push(declar);
-    if (noDefault) this.dynamicImportedNoDefault.push(declar);
-
-    this.moduleFormatter.importSpecifier(specifiers[0], declar, this.dynamicImports);
-  }
-
-  return id;
-};
-
-File.prototype.isConsequenceExpressionStatement = function (node) {
-  return t.isExpressionStatement(node) && this.lastStatements.indexOf(node) >= 0;
-};
-
-File.prototype.attachAuxiliaryComment = function (node) {
-  var comment = this.opts.auxiliaryComment;
-  if (comment) {
-    node.leadingComments = node.leadingComments || [];
-    node.leadingComments.push({
-      type: "Line",
-      value: " " + comment
-    });
-  }
-  return node;
-};
-
-File.prototype.addHelper = function (name) {
-  if (!includes(File.helpers, name)) {
-    throw new ReferenceError("Unknown helper " + name);
-  }
-
-  var program = this.ast.program;
-
-  var declar = program._declarations && program._declarations[name];
-  if (declar) return declar.id;
-
-  var runtime = this.get("runtimeIdentifier");
-  if (runtime) {
-    name = t.identifier(t.toIdentifier(name));
-    return t.memberExpression(runtime, name);
-  } else {
-    var ref = util.template(name);
-    ref._compact = true;
-    var uid = this.scope.generateUidIdentifier(name);
-    this.scope.push({
-      key: name,
-      id: uid,
-      init: ref
-    });
-    return uid;
-  }
-};
-
-File.prototype.logDeopt = function () {
-  // todo, (node, msg)
-};
-
-File.prototype.errorWithNode = function (node, msg, Error) {
-  Error = Error || SyntaxError;
-
-  var loc = node.loc.start;
-  var err = new Error("Line " + loc.line + ": " + msg);
-  err.loc = loc;
-  return err;
-};
-
-File.prototype.addCode = function (code) {
-  code = (code || "") + "";
-  this.code = code;
-  return this.parseShebang(code);
-};
-
-File.prototype.parse = function (code) {
-  var self = this;
-
-  code = this.addCode(code);
-
-  var opts = this.opts;
-
-  opts.allowImportExportEverywhere = this.isLoose("es6.modules");
-  opts.strictMode = this.transformers.useStrict.canRun();
-
-  return parse(opts, code, function (tree) {
-    self.transform(tree);
-    return self.generate();
-  });
-};
-
-File.prototype.transform = function (ast) {
-  this.debug();
-
-  this.ast = ast;
-  this.lastStatements = t.getLastStatements(ast.program);
-  this.scope = new Scope(ast.program, ast, null, this);
-
-  var modFormatter = this.moduleFormatter = this.getModuleFormatter(this.opts.modules);
-  if (modFormatter.init && this.transformers["es6.modules"].canRun()) {
-    modFormatter.init();
-  }
-
-  this.checkNode(ast);
-
-  this.call("pre");
-
-  each(this.transformerStack, function (pass) {
-    pass.transform();
-  });
-
-  this.call("post");
-};
-
-File.prototype.call = function (key) {
-  var stack = this.transformerStack;
-  for (var i = 0; i < stack.length; i++) {
-    var transformer = stack[i].transformer;
-    if (transformer[key]) {
-      transformer[key](this);
-    }
-  }
-};
-
-var checkTransformerVisitor = {
-  enter: function (node, parent, scope, state) {
-    checkNode(state.stack, node, scope);
-  }
-};
-
-var checkNode = function (stack, node, scope) {
-  each(stack, function (pass) {
-    if (pass.shouldRun) return;
-    pass.checkNode(node, scope);
-  });
-};
-
-File.prototype.checkNode = function (node, scope) {
-  var stack = this.transformerStack;
-  scope = scope || this.scope;
-
-  checkNode(stack, node, scope);
-
-  scope.traverse(node, checkTransformerVisitor, {
-    stack: stack
-  });
-};
-
-File.prototype.generate = function () {
-  var opts = this.opts;
-  var ast  = this.ast;
-
-  var result = {
-    code: "",
-    map: null,
-    ast: null
-  };
-
-  if (opts.ast) result.ast = ast;
-  if (!opts.code) return result;
-
-  var _result = generate(ast, opts, this.code);
-  result.code = _result.code;
-  result.map  = _result.map;
-
-  if (this.shebang) {
-    // add back shebang
-    result.code = this.shebang + "\n" + result.code;
-  }
-
-  if (opts.sourceMap === "inline") {
-    result.code += "\n" + sourceMapToComment(result.map);
-    result.map = null;
-  }
-
-  return result;
-};

lib/babel/transformation/helpers/name-method.js

@@ -1,53 +0,0 @@
-"use strict";
-
-var util = require("../../util");
-var t    = require("../../types");
-
-var visitor = {
-  enter: function (node, parent, scope, state) {
-    // check if this node is an identifier that matches the same as our function id
-    if (!t.isIdentifier(node, { name: state.id })) return;
-
-    // check if this node is the one referenced
-    if (!t.isReferenced(node, parent)) return;
-
-    // check that we don't have a local variable declared as that removes the need
-    // for the wrapper
-    var localDeclar = scope.getBindingIdentifier(state.id);
-    if (localDeclar !== state.outerDeclar) return;
-
-    state.selfReference = true;
-    this.stop();
-  }
-};
-
-exports.property = function (node, file, scope) {
-  var key = t.toComputedKey(node, node.key);
-  if (!t.isLiteral(key)) return node; // we can't set a function id with this
-
-  var id = t.toIdentifier(key.value);
-  key = t.identifier(id);
-
-  var state = {
-    id: id,
-    selfReference: false,
-    outerDeclar: scope.getBindingIdentifier(id),
-  };
-
-  scope.traverse(node, visitor, state);
-
-  var method = node.value;
-
-  if (state.selfReference) {
-    var templateName = "property-method-assignment-wrapper";
-    if (method.generator) templateName += "-generator";
-    node.value = util.template(templateName, {
-      FUNCTION: method,
-      FUNCTION_ID: key,
-      FUNCTION_KEY: scope.generateUidIdentifier(id),
-      WRAPPER_KEY: scope.generateUidIdentifier(id + "Wrapper")
-    });
-  } else {
-    method.id = key;
-  }
-};

lib/babel/transformation/helpers/replace-supers.js

@@ -1,303 +0,0 @@
-"use strict";
-
-module.exports = ReplaceSupers;
-
-var messages = require("../../messages");
-var t        = require("../../types");
-
-/**
- * Description
- *
- * @param {Object} opts
- * @param {Boolean} [inClass]
- */
-
-function ReplaceSupers(opts, inClass) {
-  this.topLevelThisReference = opts.topLevelThisReference;
-  this.methodNode            = opts.methodNode;
-  this.className             = opts.className;
-  this.superName             = opts.superName;
-  this.isStatic              = opts.isStatic;
-  this.hasSuper              = false;
-  this.inClass               = inClass;
-  this.isLoose               = opts.isLoose;
-  this.scope                 = opts.scope;
-  this.file                  = opts.file;
-}
-
-/**
- * Sets a super class value of the named property.
- *
- * @example
- *
- *   _set(Object.getPrototypeOf(CLASS.prototype), "METHOD", "VALUE", this)
- *
- * @param {Node} property
- * @param {Node} value
- * @param {Boolean} isComputed
- * @param {Node} thisExpression
- *
- * @returns {Node}
- */
-
-ReplaceSupers.prototype.setSuperProperty = function (property, value, isComputed, thisExpression) {
-  return t.callExpression(
-    this.file.addHelper("set"),
-    [
-      t.callExpression(
-        t.memberExpression(t.identifier("Object"), t.identifier("getPrototypeOf")),
-        [
-          this.isStatic ? this.className : t.memberExpression(this.className, t.identifier("prototype"))
-        ]
-      ),
-      isComputed ? property : t.literal(property.name),
-      value,
-      thisExpression
-    ]
-  );
-};
-
-/**
- * Gets a node representing the super class value of the named property.
- *
- * @example
- *
- *   _get(Object.getPrototypeOf(CLASS.prototype), "METHOD", this)
- *
- * @param {Node} property
- * @param {Boolean} isComputed
- * @param {Node} thisExpression
- *
- * @returns {Node}
- */
-
-ReplaceSupers.prototype.getSuperProperty = function (property, isComputed, thisExpression) {
-  return t.callExpression(
-    this.file.addHelper("get"),
-    [
-      t.callExpression(
-        t.memberExpression(t.identifier("Object"), t.identifier("getPrototypeOf")),
-        [
-          this.isStatic ? this.className : t.memberExpression(this.className, t.identifier("prototype"))
-        ]
-      ),
-      isComputed ? property : t.literal(property.name),
-      thisExpression
-    ]
-  );
-};
-
-/**
- * Description
- */
-
-ReplaceSupers.prototype.replace = function () {
-  this.traverseLevel(this.methodNode.value, true);
-};
-
-var visitor = {
-  enter: function (node, parent, scope, state) {
-    var topLevel = state.topLevel;
-    var self = state.self;
-
-    if (t.isFunction(node) && !t.isArrowFunctionExpression(node)) {
-      // we need to call traverseLevel again so we're context aware
-      self.traverseLevel(node, false);
-      return this.skip();
-    }
-
-    if (t.isProperty(node, { method: true }) || t.isMethodDefinition(node)) {
-      // break on object methods
-      return this.skip();
-    }
-
-    var getThisReference = topLevel ?
-      // top level so `this` is the instance
-      t.thisExpression :
-      // not in the top level so we need to create a reference
-      self.getThisReference.bind(self);
-
-    var callback = self.specHandle;
-    if (self.isLoose) callback = self.looseHandle;
-    return callback.call(self, getThisReference, node, parent);
-  }
-};
-
-/**
- * Description
- *
- * @param {Object} node
- * @param {Boolean} topLevel
- */
-
-ReplaceSupers.prototype.traverseLevel = function (node, topLevel) {
-  var state = { self: this, topLevel: topLevel };
-  this.scope.traverse(node, visitor, state);
-};
-
-/**
- * Description
- */
-
-ReplaceSupers.prototype.getThisReference = function () {
-  if (this.topLevelThisReference) {
-    return this.topLevelThisReference;
-  } else {
-    var ref = this.topLevelThisReference = this.scope.generateUidIdentifier("this");
-    this.methodNode.value.body.body.unshift(t.variableDeclaration("var", [
-      t.variableDeclarator(this.topLevelThisReference, t.thisExpression())
-    ]));
-    return ref;
-  }
-};
-
-/**
- * Description
- *
- * @param {Object} node
- * @param {Object} id
- * @param {Object} parent
- * @returns {Object}
- */
-
-ReplaceSupers.prototype.getLooseSuperProperty = function (id, parent) {
-  var methodNode = this.methodNode;
-  var methodName = methodNode.key;
-  var superName  = this.superName || t.identifier("Function");
-
-  if (parent.property === id) {
-    return;
-  } else if (t.isCallExpression(parent, { callee: id })) {
-    // super(); -> ClassName.prototype.MethodName.call(this);
-    parent.arguments.unshift(t.thisExpression());
-
-    if (methodName.name === "constructor") {
-      // constructor() { super(); }
-      return t.memberExpression(superName, t.identifier("call"));
-    } else {
-      id = superName;
-
-      // foo() { super(); }
-      if (!methodNode.static) {
-        id = t.memberExpression(id, t.identifier("prototype"));
-      }
-
-      id = t.memberExpression(id, methodName, methodNode.computed);
-      return t.memberExpression(id, t.identifier("call"));
-    }
-  } else if (t.isMemberExpression(parent) && !methodNode.static) {
-    // super.test -> ClassName.prototype.test
-    return t.memberExpression(superName, t.identifier("prototype"));
-  } else {
-    return superName;
-  }
-};
-
-/**
- * Description
- *
- * @param {Function} getThisReference
- * @param {Object} node
- * @param {Object} parent
- */
-
-ReplaceSupers.prototype.looseHandle = function (getThisReference, node, parent) {
-  if (t.isIdentifier(node, { name: "super" })) {
-    this.hasSuper = true;
-    return this.getLooseSuperProperty(node, parent);
-  } else if (t.isCallExpression(node)) {
-    var callee = node.callee;
-    if (!t.isMemberExpression(callee)) return;
-    if (callee.object.name !== "super") return;
-
-    // super.test(); -> ClassName.prototype.MethodName.call(this);
-    this.hasSuper = true;
-    t.appendToMemberExpression(callee, t.identifier("call"));
-    node.arguments.unshift(getThisReference());
-  }
-};
-
-/**
- * Description
- *
- * @param {Function} getThisReference
- * @param {Object} node
- * @param {Object} parent
- */
-
-ReplaceSupers.prototype.specHandle = function (getThisReference, node, parent) {
-  var methodNode = this.methodNode;
-  var property;
-  var computed;
-  var args;
-  var thisReference;
-
-  if (isIllegalBareSuper(node, parent)) {
-    throw this.file.errorWithNode(node, messages.get("classesIllegalBareSuper"));
-  }
-
-  if (t.isCallExpression(node)) {
-    var callee = node.callee;
-    if (isSuper(callee, node)) {
-      // super(); -> _get(Object.getPrototypeOf(ClassName), "MethodName", this).call(this);
-      property = methodNode.key;
-      computed = methodNode.computed;
-      args = node.arguments;
-
-      // bare `super` call is illegal inside non-constructors
-      //  - https://esdiscuss.org/topic/super-call-in-methods
-      //  - https://twitter.com/wycats/status/544553184396836864
-      if (methodNode.key.name !== "constructor" || !this.inClass) {
-        var methodName = methodNode.key.name || "METHOD_NAME";
-        throw this.file.errorWithNode(node, messages.get("classesIllegalSuperCall", methodName));
-      }
-    } else if (t.isMemberExpression(callee) && isSuper(callee.object, callee)) {
-      // super.test(); -> _get(Object.getPrototypeOf(ClassName.prototype), "test", this).call(this);
-      property = callee.property;
-      computed = callee.computed;
-      args = node.arguments;
-    }
-  } else if (t.isMemberExpression(node) && isSuper(node.object, node)) {
-    // super.name; -> _get(Object.getPrototypeOf(ClassName.prototype), "name", this);
-    property = node.property;
-    computed = node.computed;
-  } else if (t.isAssignmentExpression(node) && isSuper(node.left.object, node.left) && methodNode.kind === "set") {
-    // super.name = "val"; -> _set(Object.getPrototypeOf(ClassName.prototype), "name", this);
-    this.hasSuper = true;
-    return this.setSuperProperty(node.left.property, node.right, node.left.computed, getThisReference());
-  }
-
-  if (!property) return;
-
-  this.hasSuper = true;
-
-  thisReference = getThisReference();
-  var superProperty = this.getSuperProperty(property, computed, thisReference);
-  if (args) {
-    if (args.length === 1 && t.isSpreadElement(args[0])) {
-      // super(...arguments);
-      return t.callExpression(
-        t.memberExpression(superProperty, t.identifier("apply")),
-        [thisReference, args[0].argument]
-      );
-    } else {
-      return t.callExpression(
-        t.memberExpression(superProperty, t.identifier("call")),
-        [thisReference].concat(args)
-      );
-    }
-  } else {
-    return superProperty;
-  }
-};
-
-var isIllegalBareSuper = function (node, parent) {
-  if (!isSuper(node, parent)) return false;
-  if (t.isMemberExpression(parent, { computed: false })) return false;
-  if (t.isCallExpression(parent, { callee: node })) return false;
-  return true;
-};
-
-var isSuper = function (node, parent) {
-  return t.isIdentifier(node, { name: "super" }) && t.isReferenced(node, parent);
-};

lib/babel/transformation/modules/_default.js

@@ -1,293 +0,0 @@
-"use strict";
-
-module.exports = DefaultFormatter;
-
-var messages = require("../../messages");
-var extend   = require("lodash/object/extend");
-var object   = require("../../helpers/object");
-var util     = require("../../util");
-var t        = require("../../types");
-
-function DefaultFormatter(file) {
-  this.scope = file.scope;
-  this.file  = file;
-  this.ids   = object();
-
-  this.hasNonDefaultExports = false;
-
-  this.hasLocalExports = false;
-  this.hasLocalImports = false;
-
-  this.localImportOccurences = object();
-  this.localExports = object();
-  this.localImports = object();
-
-  this.getLocalExports();
-  this.getLocalImports();
-
-  this.remapAssignments();
-}
-
-DefaultFormatter.prototype.doDefaultExportInterop = function (node) {
-  return node.default && !this.noInteropRequireExport && !this.hasNonDefaultExports;
-};
-
-DefaultFormatter.prototype.bumpImportOccurences = function (node) {
-  var source = node.source.value;
-  var occurs = this.localImportOccurences;
-  occurs[source] = occurs[source] || 0;
-  occurs[source] += node.specifiers.length;
-};
-
-var exportsVisitor = {
-  enter: function (node, parent, scope, formatter) {
-    var declar = node && node.declaration;
-    if (t.isExportDeclaration(node)) {
-      formatter.hasLocalImports = true;
-
-      if (declar && t.isStatement(declar)) {
-        extend(formatter.localExports, t.getBindingIdentifiers(declar));
-      }
-
-      if (!node.default) {
-        formatter.hasNonDefaultExports = true;
-      }
-
-      if (node.source) {
-        formatter.bumpImportOccurences(node);
-      }
-    }
-  }
-};
-
-DefaultFormatter.prototype.getLocalExports = function () {
-  this.file.scope.traverse(this.file.ast, exportsVisitor, this);
-};
-
-var importsVisitor = {
-  enter: function (node, parent, scope, formatter) {
-    if (t.isImportDeclaration(node)) {
-      formatter.hasLocalImports = true;
-      extend(formatter.localImports, t.getBindingIdentifiers(node));
-      formatter.bumpImportOccurences(node);
-    }
-  }
-};
-
-DefaultFormatter.prototype.getLocalImports = function () {
-  this.file.scope.traverse(this.file.ast, importsVisitor, this);
-};
-
-var remapVisitor = {
-  enter: function (node, parent, scope, formatter) {
-    if (t.isUpdateExpression(node) && formatter.isLocalReference(node.argument, scope)) {
-      this.skip();
-
-      // expand to long file assignment expression
-      var assign = t.assignmentExpression(node.operator[0] + "=", node.argument, t.literal(1));
-
-      // remap this assignment expression
-      var remapped = formatter.remapExportAssignment(assign);
-
-      // we don't need to change the result
-      if (t.isExpressionStatement(parent) || node.prefix) {
-        return remapped;
-      }
-
-      var nodes = [];
-      nodes.push(remapped);
-
-      var operator;
-      if (node.operator === "--") {
-        operator = "+";
-      } else { // "++"
-        operator = "-";
-      }
-      nodes.push(t.binaryExpression(operator, node.argument, t.literal(1)));
-
-      return t.sequenceExpression(nodes);
-    }
-
-    if (t.isAssignmentExpression(node) && formatter.isLocalReference(node.left, scope)) {
-      this.skip();
-      return formatter.remapExportAssignment(node);
-    }
-  }
-};
-
-DefaultFormatter.prototype.remapAssignments = function () {
-  if (this.hasLocalImports) {
-    this.file.scope.traverse(this.file.ast, remapVisitor, this);
-  }
-};
-
-DefaultFormatter.prototype.isLocalReference = function (node) {
-  var localImports = this.localImports;
-  return t.isIdentifier(node) && localImports[node.name] && localImports[node.name] !== node;
-};
-
-DefaultFormatter.prototype.remapExportAssignment = function (node) {
-  return t.assignmentExpression(
-    "=",
-    node.left,
-    t.assignmentExpression(
-      node.operator,
-      t.memberExpression(t.identifier("exports"), node.left),
-      node.right
-    )
-  );
-};
-
-DefaultFormatter.prototype.isLocalReference = function (node, scope) {
-  var localExports = this.localExports;
-  var name = node.name;
-  return t.isIdentifier(node) && localExports[name] && localExports[name] === scope.getBindingIdentifier(name);
-};
-
-DefaultFormatter.prototype.getModuleName = function () {
-  var opts = this.file.opts;
-  var filenameRelative = opts.filenameRelative;
-  var moduleName = "";
-
-  if (opts.moduleRoot) {
-    moduleName = opts.moduleRoot + "/";
-  }
-
-  if (!opts.filenameRelative) {
-    return moduleName + opts.filename.replace(/^\//, "");
-  }
-
-  if (opts.sourceRoot) {
-    // remove sourceRoot from filename
-    var sourceRootRegEx = new RegExp("^" + opts.sourceRoot + "\/?");
-    filenameRelative = filenameRelative.replace(sourceRootRegEx, "");
-  }
-
-  if (!opts.keepModuleIdExtensions) {
-    // remove extension
-    filenameRelative = filenameRelative.replace(/\.(\w*?)$/, "");
-  }
-
-  moduleName += filenameRelative;
-
-  // normalize path separators
-  moduleName = moduleName.replace(/\\/g, "/");
-
-  return moduleName;
-};
-
-DefaultFormatter.prototype._pushStatement = function (ref, nodes) {
-  if (t.isClass(ref) || t.isFunction(ref)) {
-    if (ref.id) {
-      nodes.push(t.toStatement(ref));
-      ref = ref.id;
-    }
-  }
-
-  return ref;
-};
-
-DefaultFormatter.prototype._hoistExport = function (declar, assign, priority) {
-  if (t.isFunctionDeclaration(declar)) {
-    assign._blockHoist = priority || 2;
-  }
-
-  return assign;
-};
-
-DefaultFormatter.prototype.getExternalReference = function (node, nodes) {
-  var ids = this.ids;
-  var id = node.source.value;
-
-  if (ids[id]) {
-    return ids[id];
-  } else {
-    return this.ids[id] = this._getExternalReference(node, nodes);
-  }
-};
-
-DefaultFormatter.prototype.checkExportIdentifier = function (node) {
-  if (t.isIdentifier(node, { name: "__esModule" })) {
-    throw this.file.errorWithNode(node, messages.get("modulesIllegalExportName", node.name));
-  }
-};
-
-DefaultFormatter.prototype.exportSpecifier = function (specifier, node, nodes) {
-  if (node.source) {
-    var ref = this.getExternalReference(node, nodes);
-
-    if (t.isExportBatchSpecifier(specifier)) {
-      // export * from "foo";
-      nodes.push(this.buildExportsWildcard(ref, node));
-    } else {
-      if (t.isSpecifierDefault(specifier) && !this.noInteropRequireExport) {
-        // importing a default so we need to normalize it
-        ref = t.callExpression(this.file.addHelper("interop-require"), [ref]);
-      } else {
-        ref = t.memberExpression(ref, t.getSpecifierId(specifier));
-      }
-
-      // export { foo } from "test";
-      nodes.push(this.buildExportsAssignment(
-        t.getSpecifierName(specifier),
-        ref,
-        node
-      ));
-    }
-  } else {
-    // export { foo };
-    nodes.push(this.buildExportsAssignment(t.getSpecifierName(specifier), specifier.id, node));
-  }
-};
-
-DefaultFormatter.prototype.buildExportsWildcard = function (objectIdentifier) {
-  return t.expressionStatement(t.callExpression(this.file.addHelper("defaults"), [
-    t.identifier("exports"),
-    t.callExpression(this.file.addHelper("interop-require-wildcard"), [objectIdentifier])
-  ]));
-};
-
-DefaultFormatter.prototype.buildExportsAssignment = function (id, init) {
-  this.checkExportIdentifier(id);
-  return util.template("exports-assign", {
-    VALUE: init,
-    KEY:   id
-  }, true);
-};
-
-DefaultFormatter.prototype.exportDeclaration = function (node, nodes) {
-  var declar = node.declaration;
-
-  var id = declar.id;
-
-  if (node.default) {
-    id = t.identifier("default");
-  }
-
-  var assign;
-
-  if (t.isVariableDeclaration(declar)) {
-    for (var i = 0; i < declar.declarations.length; i++) {
-      var decl = declar.declarations[i];
-
-      decl.init = this.buildExportsAssignment(decl.id, decl.init, node).expression;
-
-      var newDeclar = t.variableDeclaration(declar.kind, [decl]);
-      if (i === 0) t.inherits(newDeclar, declar);
-      nodes.push(newDeclar);
-    }
-  } else {
-    var ref = declar;
-
-    if (t.isFunctionDeclaration(declar) || t.isClassDeclaration(declar)) {
-      ref = declar.id;
-      nodes.push(declar);
-    }
-
-    assign = this.buildExportsAssignment(id, ref, node);
-
-    nodes.push(assign);
-
-    this._hoistExport(declar, assign);
-  }
-};

lib/babel/transformation/modules/amd.js

@@ -1,108 +0,0 @@
-"use strict";
-
-module.exports = AMDFormatter;
-
-var DefaultFormatter = require("./_default");
-var CommonFormatter  = require("./common");
-var includes         = require("lodash/collection/includes");
-var values           = require("lodash/object/values");
-var util             = require("../../util");
-var t                = require("../../types");
-
-function AMDFormatter() {
-  CommonFormatter.apply(this, arguments);
-}
-
-util.inherits(AMDFormatter, DefaultFormatter);
-
-AMDFormatter.prototype.init = CommonFormatter.prototype.init;
-
-AMDFormatter.prototype.buildDependencyLiterals = function () {
-  var names = [];
-  for (var name in this.ids) {
-    names.push(t.literal(name));
-  }
-  return names;
-};
-
-/**
- * Wrap the entire body in a `define` wrapper.
- */
-
-AMDFormatter.prototype.transform = function (program) {
-  var body = program.body;
-
-  // build an array of module names
-
-  var names = [t.literal("exports")];
-  if (this.passModuleArg) names.push(t.literal("module"));
-  names = names.concat(this.buildDependencyLiterals());
-  names = t.arrayExpression(names);
-
-  // build up define container
-
-  var params = values(this.ids);
-  if (this.passModuleArg) params.unshift(t.identifier("module"));
-  params.unshift(t.identifier("exports"));
-
-  var container = t.functionExpression(null, params, t.blockStatement(body));
-
-  var defineArgs = [names, container];
-  var moduleName = this.getModuleName();
-  if (moduleName) defineArgs.unshift(t.literal(moduleName));
-
-  var call = t.callExpression(t.identifier("define"), defineArgs);
-
-  program.body = [t.expressionStatement(call)];
-};
-
-/**
- * Get the AMD module name that we'll prepend to the wrapper
- * to define this module
- */
-
-AMDFormatter.prototype.getModuleName = function () {
-  if (this.file.opts.moduleIds) {
-    return DefaultFormatter.prototype.getModuleName.apply(this, arguments);
-  } else {
-    return null;
-  }
-};
-
-AMDFormatter.prototype._getExternalReference = function (node) {
-  return this.scope.generateUidIdentifier(node.source.value);
-};
-
-AMDFormatter.prototype.importDeclaration = function (node) {
-  this.getExternalReference(node);
-};
-
-AMDFormatter.prototype.importSpecifier = function (specifier, node, nodes) {
-  var key = t.getSpecifierName(specifier);
-  var ref = this.getExternalReference(node);
-
-  if (includes(this.file.dynamicImportedNoDefault, node)) {
-    // Prevent unnecessary renaming of dynamic imports.
-    this.ids[node.source.value] = ref;
-  } else if (t.isImportBatchSpecifier(specifier)) {
-    // import * as bar from "foo";
-  } else if (!includes(this.file.dynamicImported, node) && t.isSpecifierDefault(specifier) && !this.noInteropRequireImport) {
-    // import foo from "foo";
-    ref = t.callExpression(this.file.addHelper("interop-require"), [ref]);
-  } else {
-    // import {foo} from "foo";
-    ref = t.memberExpression(ref, t.getSpecifierId(specifier), false);
-  }
-
-  nodes.push(t.variableDeclaration("var", [
-    t.variableDeclarator(key, ref)
-  ]));
-};
-
-AMDFormatter.prototype.exportDeclaration = function (node) {
-  if (this.doDefaultExportInterop(node)) {
-    this.passModuleArg = true;
-  }
-
-  CommonFormatter.prototype.exportDeclaration.apply(this, arguments);
-};

lib/babel/transformation/modules/common-standard.js

@@ -1,13 +0,0 @@
-"use strict";
-
-module.exports = CommonStandardFormatter;
-
-var CommonStrictFormatter = require("./common-strict");
-var util = require("../../util");
-
-function CommonStandardFormatter() {
-  this.noInteropRequireImport = true;
-  CommonStrictFormatter.apply(this, arguments);
-}
-
-util.inherits(CommonStandardFormatter, CommonStrictFormatter);

lib/babel/transformation/modules/common.js

@@ -1,106 +0,0 @@
-"use strict";
-
-module.exports = CommonJSFormatter;
-
-var DefaultFormatter = require("./_default");
-var includes         = require("lodash/collection/includes");
-var util             = require("../../util");
-var t                = require("../../types");
-
-function CommonJSFormatter() {
-  DefaultFormatter.apply(this, arguments);
-}
-
-util.inherits(CommonJSFormatter, DefaultFormatter);
-
-CommonJSFormatter.prototype.init = function () {
-  var file  = this.file;
-  var scope = file.scope;
-
-  scope.rename("module");
-
-  if (!this.noInteropRequireImport && this.hasNonDefaultExports) {
-    var templateName = "exports-module-declaration";
-    if (this.file.isLoose("es6.modules")) templateName += "-loose";
-    file.ast.program.body.push(util.template(templateName, true));
-  }
-};
-
-CommonJSFormatter.prototype.importSpecifier = function (specifier, node, nodes) {
-  var variableName = t.getSpecifierName(specifier);
-
-  var ref = this.getExternalReference(node, nodes);
-
-  // import foo from "foo";
-  if (t.isSpecifierDefault(specifier)) {
-    if (!includes(this.file.dynamicImportedNoDefault, node)) {
-      if (this.noInteropRequireImport || includes(this.file.dynamicImported, node)) {
-        ref = t.memberExpression(ref, t.identifier("default"));
-      } else {
-        ref = t.callExpression(this.file.addHelper("interop-require"), [ref]);
-      }
-    }
-    nodes.push(t.variableDeclaration("var", [t.variableDeclarator(variableName, ref)]));
-  } else {
-    if (specifier.type === "ImportBatchSpecifier") {
-
-      if (!this.noInteropRequireImport) {
-        ref = t.callExpression(this.file.addHelper("interop-require-wildcard"), [ref]);
-      }
-
-      // import * as bar from "foo";
-      nodes.push(t.variableDeclaration("var", [
-        t.variableDeclarator(variableName, ref)
-      ]));
-    } else {
-      // import { foo } from "foo";
-      nodes.push(t.variableDeclaration("var", [
-        t.variableDeclarator(
-          variableName,
-          t.memberExpression(ref, t.getSpecifierId(specifier))
-        )
-      ]));
-    }
-  }
-};
-
-CommonJSFormatter.prototype.importDeclaration = function (node, nodes) {
-  // import "foo";
-  nodes.push(util.template("require", {
-    MODULE_NAME: node.source
-  }, true));
-};
-
-CommonJSFormatter.prototype.exportDeclaration = function (node, nodes) {
-  if (this.doDefaultExportInterop(node)) {
-    var declar = node.declaration;
-    var assign = util.template("exports-default-assign", {
-      VALUE: this._pushStatement(declar, nodes)
-    }, true);
-
-    if (t.isFunctionDeclaration(declar)) {
-      // we can hoist this assignment to the top of the file
-      assign._blockHoist = 3;
-    }
-
-    nodes.push(assign);
-    return;
-  }
-
-  DefaultFormatter.prototype.exportDeclaration.apply(this, arguments);
-};
-
-CommonJSFormatter.prototype._getExternalReference = function (node, nodes) {
-  var source = node.source.value;
-  var call = t.callExpression(t.identifier("require"), [node.source]);
-
-  if (this.localImportOccurences[source] > 1) {
-    var uid = this.scope.generateUidIdentifier(source);
-    nodes.push(t.variableDeclaration("var", [
-      t.variableDeclarator(uid, call)
-    ]));
-    return uid;
-  } else {
-    return call;
-  }
-};

lib/babel/transformation/modules/ignore.js

@@ -1,20 +0,0 @@
-"use strict";
-
-module.exports = IgnoreFormatter;
-
-var t = require("../../types");
-
-function IgnoreFormatter() {
-
-}
-
-IgnoreFormatter.prototype.exportDeclaration = function (node, nodes) {
-  var declar = t.toStatement(node.declaration, true);
-  if (declar) nodes.push(t.inherits(declar, node));
-};
-
-IgnoreFormatter.prototype.importDeclaration =
-IgnoreFormatter.prototype.importSpecifier =
-IgnoreFormatter.prototype.exportSpecifier = function () {
-
-};

lib/babel/transformation/modules/index.js

@@ -1,11 +0,0 @@
-module.exports = {
-  commonStandard: require("./common-standard"),
-  commonStrict:   require("./common-strict"),
-  amdStrict:      require("./amd-strict"),
-  umdStrict:      require("./umd-strict"),
-  common:         require("./common"),
-  system:         require("./system"),
-  ignore:         require("./ignore"),
-  amd:            require("./amd"),
-  umd:            require("./umd")
-};

lib/babel/transformation/modules/system.js

@@ -1,201 +0,0 @@
-"use strict";
-
-module.exports = SystemFormatter;
-
-var DefaultFormatter = require("./_default");
-var AMDFormatter     = require("./amd");
-var useStrict        = require("../helpers/use-strict");
-var util             = require("../../util");
-var t                = require("../../types");
-var last             = require("lodash/array/last");
-var each             = require("lodash/collection/each");
-var map              = require("lodash/collection/map");
-
-function SystemFormatter(file) {
-  this.exportIdentifier = file.scope.generateUidIdentifier("export");
-  this.noInteropRequireExport = true;
-  this.noInteropRequireImport = true;
-
-  DefaultFormatter.apply(this, arguments);
-}
-
-util.inherits(SystemFormatter, AMDFormatter);
-
-SystemFormatter.prototype.init = function () {};
-
-SystemFormatter.prototype._addImportSource = function (node, exportNode) {
-  node._importSource = exportNode.source && exportNode.source.value;
-  return node;
-};
-
-SystemFormatter.prototype.buildExportsWildcard = function (objectIdentifier, node) {
-  var leftIdentifier = this.scope.generateUidIdentifier("key");
-  var valIdentifier  = t.memberExpression(objectIdentifier, leftIdentifier, true);
-
-  var left = t.variableDeclaration("var", [
-    t.variableDeclarator(leftIdentifier)
-  ]);
-
-  var right = objectIdentifier;
-
-  var block = t.blockStatement([
-    t.expressionStatement(this.buildExportCall(leftIdentifier, valIdentifier))
-  ]);
-
-  return this._addImportSource(t.forInStatement(left, right, block), node);
-};
-
-SystemFormatter.prototype.buildExportsAssignment = function (id, init, node) {
-  var call = this.buildExportCall(t.literal(id.name), init, true);
-  return this._addImportSource(call, node);
-};
-
-SystemFormatter.prototype.remapExportAssignment = function (node) {
-  return this.buildExportCall(t.literal(node.left.name), node);
-};
-
-SystemFormatter.prototype.buildExportCall = function (id, init, isStatement) {
-  var call = t.callExpression(this.exportIdentifier, [id, init]);
-  if (isStatement) {
-    return t.expressionStatement(call);
-  } else {
-    return call;
-  }
-};
-
-SystemFormatter.prototype.importSpecifier = function (specifier, node, nodes) {
-  AMDFormatter.prototype.importSpecifier.apply(this, arguments);
-  this._addImportSource(last(nodes), node);
-};
-
-var runnerSettersVisitor = {
-  enter: function (node, parent, scope, state) {
-    if (node._importSource === state.source) {
-      if (t.isVariableDeclaration(node)) {
-        each(node.declarations, function (declar) {
-          state.hoistDeclarators.push(t.variableDeclarator(declar.id));
-          state.nodes.push(t.expressionStatement(
-            t.assignmentExpression("=", declar.id, declar.init)
-          ));
-        });
-      } else {
-        state.nodes.push(node);
-      }
-
-      this.remove();
-    }
-  }
-};
-
-SystemFormatter.prototype.buildRunnerSetters = function (block, hoistDeclarators) {
-  var scope = this.file.scope;
-
-  return t.arrayExpression(map(this.ids, function (uid, source) {
-    var state = {
-      source:           source,
-      nodes:            [],
-      hoistDeclarators: hoistDeclarators
-    };
-
-    scope.traverse(block, runnerSettersVisitor, state);
-
-    return t.functionExpression(null, [uid], t.blockStatement(state.nodes));
-  }));
-};
-
-var hoistVariablesVisitor = {
-  enter: function (node, parent, scope, hoistDeclarators) {
-    if (t.isFunction(node)) {
-      // nothing inside is accessible
-      return this.skip();
-    }
-
-    if (t.isVariableDeclaration(node)) {
-      if (node.kind !== "var" && !t.isProgram(parent)) { // let, const
-        // can't be accessed
-        return;
-      }
-
-      // ignore block hoisted nodes as these can be left in
-      if (node._blockHoist) return;
-
-      var nodes = [];
-
-      for (var i = 0; i < node.declarations.length; i++) {
-        var declar = node.declarations[i];
-        hoistDeclarators.push(t.variableDeclarator(declar.id));
-        if (declar.init) {
-          // no initializer so we can just hoist it as-is
-          var assign = t.expressionStatement(t.assignmentExpression("=", declar.id, declar.init));
-          nodes.push(assign);
-        }
-      }
-
-      // for (var i in test)
-      // for (var i = 0;;)
-      if (t.isFor(parent)) {
-        if (parent.left === node) {
-          return node.declarations[0].id;
-        }
-
-        if (parent.init === node) {
-          return t.toSequenceExpression(nodes, scope);
-        }
-      }
-
-      return nodes;
-    }
-  }
-};
-
-var hoistFunctionsVisitor = {
-  enter: function (node, parent, scope, handlerBody) {
-    if (t.isFunction(node)) this.skip();
-
-    if (t.isFunctionDeclaration(node) || node._blockHoist) {
-      handlerBody.push(node);
-      this.remove();
-    }
-  }
-};
-
-SystemFormatter.prototype.transform = function (program) {
-  var hoistDeclarators = [];
-  var moduleName = this.getModuleName();
-  var moduleNameLiteral = t.literal(moduleName);
-
-  var block = t.blockStatement(program.body);
-
-  var runner = util.template("system", {
-    MODULE_NAME: moduleNameLiteral,
-    MODULE_DEPENDENCIES: t.arrayExpression(this.buildDependencyLiterals()),
-    EXPORT_IDENTIFIER: this.exportIdentifier,
-    SETTERS: this.buildRunnerSetters(block, hoistDeclarators),
-    EXECUTE: t.functionExpression(null, [], block)
-  }, true);
-
-  var handlerBody = runner.expression.arguments[2].body.body;
-  if (!moduleName) runner.expression.arguments.shift();
-
-  var returnStatement = handlerBody.pop();
-
-  // hoist up all variable declarations
-  this.file.scope.traverse(block, hoistVariablesVisitor, hoistDeclarators);
-
-  if (hoistDeclarators.length) {
-    var hoistDeclar = t.variableDeclaration("var", hoistDeclarators);
-    hoistDeclar._blockHoist = true;
-    handlerBody.unshift(hoistDeclar);
-  }
-
-  // hoist up function declarations for circular references
-  this.file.scope.traverse(block, hoistFunctionsVisitor, handlerBody);
-
-  handlerBody.push(returnStatement);
-
-  if (useStrict.has(block)) {
-    handlerBody.unshift(block.body.shift());
-  }
-
-  program.body = [runner];
-};

lib/babel/transformation/modules/umd.js

@@ -1,73 +0,0 @@
-"use strict";
-
-module.exports = UMDFormatter;
-
-var AMDFormatter = require("./amd");
-var util         = require("../../util");
-var t            = require("../../types");
-var values       = require("lodash/object/values");
-
-function UMDFormatter() {
-  AMDFormatter.apply(this, arguments);
-}
-
-util.inherits(UMDFormatter, AMDFormatter);
-
-UMDFormatter.prototype.transform = function (program) {
-  var body = program.body;
-
-  // build an array of module names
-
-  var names = [];
-  for (var name in this.ids) {
-    names.push(t.literal(name));
-  }
-
-  // factory
-
-  var ids  = values(this.ids);
-  var args = [t.identifier("exports")];
-  if (this.passModuleArg) args.push(t.identifier("module"));
-  args = args.concat(ids);
-
-  var factory = t.functionExpression(null, args, t.blockStatement(body));
-
-  // amd
-
-  var defineArgs = [t.literal("exports")];
-  if (this.passModuleArg) defineArgs.push(t.literal("module"));
-  defineArgs = defineArgs.concat(names);
-  defineArgs = [t.arrayExpression(defineArgs)];
-
-  // common
-
-  var testExports = util.template("test-exports");
-  var testModule  = util.template("test-module");
-  var commonTests = this.passModuleArg ? t.logicalExpression("&&", testExports, testModule) : testExports;
-
-  var commonArgs = [t.identifier("exports")];
-  if (this.passModuleArg) commonArgs.push(t.identifier("module"));
-  commonArgs = commonArgs.concat(names.map(function (name) {
-    return t.callExpression(t.identifier("require"), [name]);
-  }));
-
-  // globals
-
-  //var umdArgs = [];
-
-  //
-
-  var moduleName = this.getModuleName();
-  if (moduleName) defineArgs.unshift(t.literal(moduleName));
-
-  var runner = util.template("umd-runner-body", {
-    AMD_ARGUMENTS: defineArgs,
-    COMMON_TEST: commonTests,
-    COMMON_ARGUMENTS: commonArgs
-  });
-
-  //
-
-  var call = t.callExpression(runner, [factory]);
-  program.body = [t.expressionStatement(call)];
-};

lib/babel/transformation/templates/.babelrc

@@ -1,3 +0,0 @@
-{
-  "blacklist": ["useStrict"]
-}

lib/babel/transformation/templates/for-of.js

@@ -1,3 +0,0 @@
-for (var ITERATOR_KEY = OBJECT[Symbol.iterator](), STEP_KEY; !(STEP_KEY = ITERATOR_KEY.next()).done; ) {
-
-}

lib/babel/transformation/templates/tail-call-body.js

@@ -1,3 +0,0 @@
-{
-  FUNCTION_ID:while (true) BLOCK
-}

lib/babel/transformation/templates/tail-call.js

@@ -1,23 +0,0 @@
-(function () {
-  function Tail(func, args, context) {
-    this.func = func;
-    this.args = args;
-    this.context = context;
-  }
-
-  Tail.prototype._isTailDescriptor = true;
-
-  var isRunning = false;
-
-  return function (func, args, context) {
-    var result = new Tail(func, args, context);
-    if (!isRunning) {
-      isRunning = true;
-      do {
-        result = result.func.apply(result.context, result.args);
-      } while (result instanceof Tail || (result && result._isTailDescriptor));
-      isRunning = false;
-    }
-    return result;
-  };
-})()

lib/babel/transformation/transformer-pass.js

@@ -1,63 +0,0 @@
-module.exports = TransformerPass;
-
-var includes = require("lodash/collection/includes");
-
-/**
- * This class is responsible for traversing over the provided `File`s
- * AST and running it's parent transformers handlers over it.
- */
-
-function TransformerPass(file, transformer) {
-  this.transformer = transformer;
-  this.shouldRun   = !transformer.check;
-  this.handlers    = transformer.handlers;
-  this.file        = file;
-}
-
-TransformerPass.prototype.canRun = function () {
-  var transformer = this.transformer;
-
-  var opts = this.file.opts;
-  var key  = transformer.key;
-
-  // internal
-  if (key[0] === "_") return true;
-
-  // blacklist
-  var blacklist = opts.blacklist;
-  if (blacklist.length && includes(blacklist, key)) return false;
-
-  // whitelist
-  var whitelist = opts.whitelist;
-  if (whitelist.length) return includes(whitelist, key);
-
-  // optional
-  if (transformer.optional && !includes(opts.optional, key)) return false;
-
-  // experimental
-  if (transformer.experimental && !opts.experimental) return false;
-
-  // playground
-  if (transformer.playground && !opts.playground) return false;
-
-  return true;
-};
-
-TransformerPass.prototype.checkNode = function (node) {
-  var check = this.transformer.check;
-  if (check) {
-    return this.shouldRun = check(node);
-  } else {
-    return true;
-  }
-};
-
-TransformerPass.prototype.transform = function () {
-  if (!this.shouldRun) return;
-
-  var file = this.file;
-
-  file.debug("Running transformer " + this.transformer.key);
-
-  file.scope.traverse(file.ast, this.handlers, file);
-};

lib/babel/transformation/transformer.js

@@ -1,75 +0,0 @@
-"use strict";
-
-module.exports = Transformer;
-
-var TransformerPass = require("./transformer-pass");
-var isFunction      = require("lodash/lang/isFunction");
-var traverse        = require("../traversal");
-var isObject        = require("lodash/lang/isObject");
-var assign          = require("lodash/object/assign");
-var each            = require("lodash/collection/each");
-
-/**
- * This is the class responsible for normalising a transformers handlers
- * as well as constructing a `TransformerPass` that is repsonsible for
- * actually running the transformer over the provided `File`.
- */
-
-function Transformer(key, transformer, opts) {
-  transformer = assign({}, transformer);
-
-  var take = function (key) {
-    var val = transformer[key];
-    delete transformer[key];
-    return val;
-  };
-
-  this.manipulateOptions = take("manipulateOptions");
-  this.check             = take("check");
-  this.post              = take("post");
-  this.pre               = take("pre");
-
-  this.experimental = !!take("experimental");
-  this.playground   = !!take("playground");
-  this.secondPass   = !!take("secondPass");
-  this.optional     = !!take("optional");
-
-  this.handlers = this.normalize(transformer);
-  this.opts     = opts || {};
-  this.key      = key;
-}
-
-Transformer.prototype.normalize = function (transformer) {
-  var self = this;
-
-  if (isFunction(transformer)) {
-    transformer = { ast: transformer };
-  }
-
-  traverse.explode(transformer);
-
-  each(transformer, function (fns, type) {
-    // hidden property
-    if (type[0] === "_") {
-      self[type] = fns;
-      return;
-    }
-
-    if (type === "enter" || type === "exit") return;
-
-    if (isFunction(fns)) fns = { enter: fns };
-
-    if (!isObject(fns)) return;
-
-    if (!fns.enter) fns.enter = function () { };
-    if (!fns.exit) fns.exit = function () { };
-
-    transformer[type] = fns;
-  });
-
-  return transformer;
-};
-
-Transformer.prototype.buildPass = function (file) {
-  return new TransformerPass(file, this);
-};

lib/babel/transformation/transformers/deprecated.json

@@ -1 +0,0 @@
-{}

lib/babel/transformation/transformers/es6/block-scoping.js

@@ -1,559 +0,0 @@
-"use strict";
-
-var traverse = require("../../../traversal");
-var object   = require("../../../helpers/object");
-var util     = require("../../../util");
-var t        = require("../../../types");
-var values   = require("lodash/object/values");
-var extend   = require("lodash/object/extend");
-
-exports.check = function (node) {
-  return t.isVariableDeclaration(node) && (node.kind === "let" || node.kind === "const");
-};
-
-var isLet = function (node, parent) {
-  if (!t.isVariableDeclaration(node)) return false;
-  if (node._let) return true;
-  if (node.kind !== "let") return false;
-
-  // https://github.com/babel/babel/issues/255
-  if (isLetInitable(node, parent)) {
-    for (var i = 0; i < node.declarations.length; i++) {
-      var declar = node.declarations[i];
-      declar.init = declar.init || t.identifier("undefined");
-    }
-  }
-
-  node._let = true;
-  node.kind = "var";
-  return true;
-};
-
-var isLetInitable = function (node, parent) {
-  return !t.isFor(parent) || t.isFor(parent) && parent.left !== node;
-};
-
-var isVar = function (node, parent) {
-  return t.isVariableDeclaration(node, { kind: "var" }) && !isLet(node, parent);
-};
-
-var standardizeLets = function (declars) {
-  for (var i = 0; i < declars.length; i++) {
-    delete declars[i]._let;
-  }
-};
-
-exports.VariableDeclaration = function (node, parent, scope, file) {
-  if (!isLet(node, parent)) return;
-
-  if (isLetInitable(node) && file.transformers["es6.blockScopingTDZ"].canRun()) {
-    var nodes = [node];
-
-    for (var i = 0; i < node.declarations.length; i++) {
-      var decl = node.declarations[i];
-      if (decl.init) {
-        var assign = t.assignmentExpression("=", decl.id, decl.init);
-        assign._ignoreBlockScopingTDZ = true;
-        nodes.push(t.expressionStatement(assign));
-      }
-      decl.init = file.addHelper("temporal-undefined");
-    }
-
-    node._blockHoist = 2;
-
-    return nodes;
-  }
-};
-
-exports.Loop = function (node, parent, scope, file) {
-  var init = node.left || node.init;
-  if (isLet(init, node)) {
-    t.ensureBlock(node);
-    node.body._letDeclarators = [init];
-  }
-  var blockScoping = new BlockScoping(node, node.body, parent, scope, file);
-  blockScoping.run();
-};
-
-exports.Program =
-exports.BlockStatement = function (block, parent, scope, file) {
-  if (!t.isLoop(parent)) {
-    var blockScoping = new BlockScoping(false, block, parent, scope, file);
-    blockScoping.run();
-  }
-};
-
-/**
- * Description
- *
- * @param {Boolean|Node} loopParent
- * @param {Node} block
- * @param {Node} parent
- * @param {Scope} scope
- * @param {File} file
- */
-
-function BlockScoping(loopParent, block, parent, scope, file) {
-  this.loopParent = loopParent;
-  this.parent     = parent;
-  this.scope      = scope;
-  this.block      = block;
-  this.file       = file;
-
-  this.outsideLetReferences = object();
-  this.hasLetReferences     = false;
-  this.letReferences        = block._letReferences = object();
-  this.body                 = [];
-}
-
-/**
- * Start the ball rolling.
- */
-
-BlockScoping.prototype.run = function () {
-  var block = this.block;
-  if (block._letDone) return;
-  block._letDone = true;
-
-  var needsClosure = this.getLetReferences();
-
-  // this is a block within a `Function/Program` so we can safely leave it be
-  if (t.isFunction(this.parent) || t.isProgram(this.block)) return;
-
-  // we can skip everything
-  if (!this.hasLetReferences) return;
-
-  if (needsClosure) {
-    this.wrapClosure();
-  } else {
-    this.remap();
-  }
-};
-
-function replace(node, parent, scope, remaps) {
-  if (!t.isReferencedIdentifier(node, parent)) return;
-
-  var remap = remaps[node.name];
-  if (!remap) return;
-
-  var ownBinding = scope.getBindingIdentifier(node.name);
-  if (ownBinding === remap.binding) {
-    node.name = remap.uid;
-  } else {
-    // scope already has it's own binding that doesn't
-    // match the one we have a stored replacement for
-    if (this) this.skip();
-  }
-}
-
-var replaceVisitor = {
-  enter: replace
-};
-
-function traverseReplace(node, parent, scope, remaps) {
-  replace(node, parent, scope, remaps);
-  scope.traverse(node, replaceVisitor, remaps);
-}
-
-/**
- * Description
- */
-
-BlockScoping.prototype.remap = function () {
-  var hasRemaps = false;
-  var letRefs   = this.letReferences;
-  var scope     = this.scope;
-
-  // alright, so since we aren't wrapping this block in a closure
-  // we have to check if any of our let variables collide with
-  // those in upper scopes and then if they do, generate a uid
-  // for them and replace all references with it
-  var remaps = object();
-
-  for (var key in letRefs) {
-    // just an Identifier node we collected in `getLetReferences`
-    // this is the defining identifier of a declaration
-    var ref = letRefs[key];
-
-    if (scope.parentHasBinding(key) || scope.hasGlobal(key)) {
-      var uid = scope.generateUidIdentifier(ref.name).name;
-      ref.name = uid;
-
-      hasRemaps = true;
-      remaps[key] = remaps[uid] = {
-        binding: ref,
-        uid: uid
-      };
-    }
-  }
-
-  if (!hasRemaps) return;
-
-  //
-
-  var loopParent = this.loopParent;
-  if (loopParent) {
-    traverseReplace(loopParent.right, loopParent, scope, remaps);
-    traverseReplace(loopParent.test, loopParent, scope, remaps);
-    traverseReplace(loopParent.update, loopParent, scope, remaps);
-  }
-
-  scope.traverse(this.block, replaceVisitor, remaps);
-};
-
-/**
- * Description
- */
-
-BlockScoping.prototype.wrapClosure = function () {
-  var block = this.block;
-
-  var outsideRefs = this.outsideLetReferences;
-
-  // remap loop heads with colliding variables
-  if (this.loopParent) {
-    for (var name in outsideRefs) {
-      var id = outsideRefs[name];
-
-      if (this.scope.hasGlobal(id.name)) {
-        delete outsideRefs[id.name];
-        delete this.letReferences[id.name];
-
-        this.scope.rename(id.name);
-
-        this.letReferences[id.name] = id;
-        outsideRefs[id.name] = id;
-      }
-    }
-  }
-
-  // if we're inside of a for loop then we search to see if there are any
-  // `break`s, `continue`s, `return`s etc
-  this.has = this.checkLoop();
-
-  // hoist var references to retain scope
-  this.hoistVarDeclarations();
-
-  // turn outsideLetReferences into an array
-  var params = values(outsideRefs);
-
-  // build the closure that we're going to wrap the block with
-  var fn = t.functionExpression(null, params, t.blockStatement(block.body));
-  fn._aliasFunction = true;
-
-  // replace the current block body with the one we're going to build
-  block.body = this.body;
-
-  // build a call and a unique id that we can assign the return value to
-  var call = t.callExpression(fn, params);
-  var ret  = this.scope.generateUidIdentifier("ret");
-
-  // handle generators
-  var hasYield = traverse.hasType(fn.body, this.scope, "YieldExpression", t.FUNCTION_TYPES);
-  if (hasYield) {
-    fn.generator = true;
-    call = t.yieldExpression(call, true);
-  }
-
-  // handlers async functions
-  var hasAsync = traverse.hasType(fn.body, this.scope, "AwaitExpression", t.FUNCTION_TYPES);
-  if (hasAsync) {
-    fn.async = true;
-    call = t.awaitExpression(call, true);
-  }
-
-  this.build(ret, call);
-};
-
-var letReferenceFunctionVisitor = {
-  enter: function (node, parent, scope, state) {
-    // not a direct reference
-    if (!t.isReferencedIdentifier(node, parent)) return;
-
-    // this scope has a variable with the same name so it couldn't belong
-    // to our let scope
-    if (scope.hasOwnBinding(node.name)) return;
-
-    // not a part of our scope
-    if (!state.letReferences[node.name]) return;
-
-    state.closurify = true;
-  }
-};
-
-var letReferenceBlockVisitor = {
-  enter: function (node, parent, scope, state) {
-    if (t.isFunction(node)) {
-      scope.traverse(node, letReferenceFunctionVisitor, state);
-      return this.skip();
-    }
-  }
-};
-
-/**
- * Description
- */
-
-BlockScoping.prototype.getLetReferences = function () {
-  var block = this.block;
-
-  var declarators = block._letDeclarators || [];
-  var declar;
-
-  //
-  for (var i = 0; i < declarators.length; i++) {
-    declar = declarators[i];
-    extend(this.outsideLetReferences, t.getBindingIdentifiers(declar));
-  }
-
-  //
-  if (block.body) {
-    for (i = 0; i < block.body.length; i++) {
-      declar = block.body[i];
-      if (isLet(declar, block)) {
-        declarators = declarators.concat(declar.declarations);
-      }
-    }
-  }
-
-  //
-  for (i = 0; i < declarators.length; i++) {
-    declar = declarators[i];
-    var keys = t.getBindingIdentifiers(declar);
-    extend(this.letReferences, keys);
-    this.hasLetReferences = true;
-  }
-
-  // no let references so we can just quit
-  if (!this.hasLetReferences) return;
-
-  // set let references to plain var references
-  standardizeLets(declarators);
-
-  var state = {
-    letReferences: this.letReferences,
-    closurify:     false
-  };
-
-  // traverse through this block, stopping on functions and checking if they
-  // contain any local let references
-  this.scope.traverse(this.block, letReferenceBlockVisitor, state);
-
-  return state.closurify;
-};
-
-var loopNodeTo = function (node) {
-  if (t.isBreakStatement(node)) {
-    return "break";
-  } else if (t.isContinueStatement(node)) {
-    return "continue";
-  }
-};
-
-var loopVisitor = {
-  enter: function (node, parent, scope, state) {
-    var replace;
-
-    if (t.isLoop(node)) {
-      state.ignoreLabeless = true;
-      scope.traverse(node, loopVisitor, state);
-      state.ignoreLabeless = false;
-    }
-
-    if (t.isFunction(node) || t.isLoop(node)) {
-      return this.skip();
-    }
-
-    var loopText = loopNodeTo(node);
-
-    if (loopText) {
-      if (node.label) {
-        // we shouldn't be transforming this because it exists somewhere inside
-        if (state.innerLabels.indexOf(node.label.name) >= 0) {
-          return;
-        }
-
-        loopText = loopText + "|" + node.label.name;
-      } else {
-        // we shouldn't be transforming these statements because
-        // they don't refer to the actual loop we're scopifying
-        if (state.ignoreLabeless) return;
-
-        // break statements mean something different in this context
-        if (t.isBreakStatement(node) && t.isSwitchCase(parent)) return;
-      }
-
-      state.hasBreakContinue = true;
-      state.map[loopText] = node;
-      replace = t.literal(loopText);
-    }
-
-    if (t.isReturnStatement(node)) {
-      state.hasReturn = true;
-      replace = t.objectExpression([
-        t.property("init", t.identifier("v"), node.argument || t.identifier("undefined"))
-      ]);
-    }
-
-    if (replace) {
-      replace = t.returnStatement(replace);
-      return t.inherits(replace, node);
-    }
-  }
-};
-
-var loopLabelVisitor = {
-  enter: function (node, parent, scope, state) {
-    if (t.isLabeledStatement(node)) {
-      state.innerLabels.push(node.label.name);
-    }
-  }
-};
-
-/**
- * If we're inside of a loop then traverse it and check if it has one of
- * the following node types `ReturnStatement`, `BreakStatement`,
- * `ContinueStatement` and replace it with a return value that we can track
- * later on.
- *
- * @returns {Object}
- */
-
-BlockScoping.prototype.checkLoop = function () {
-  var state = {
-    hasBreakContinue: false,
-    ignoreLabeless:   false,
-    innerLabels:      [],
-    hasReturn:        false,
-    isLoop:           !!this.loopParent,
-    map:              {}
-  };
-
-  this.scope.traverse(this.block, loopLabelVisitor, state);
-  this.scope.traverse(this.block, loopVisitor, state);
-
-  return state;
-};
-
-var hoistVarDeclarationsVisitor = {
-  enter: function (node, parent, scope, self) {
-    if (t.isForStatement(node)) {
-      if (isVar(node.init, node)) {
-        node.init = t.sequenceExpression(self.pushDeclar(node.init));
-      }
-    } else if (t.isFor(node)) {
-      if (isVar(node.left, node)) {
-        node.left = node.left.declarations[0].id;
-      }
-    } else if (isVar(node, parent)) {
-      return self.pushDeclar(node).map(t.expressionStatement);
-    } else if (t.isFunction(node)) {
-      return this.skip();
-    }
-  }
-};
-
-/**
- * Hoist all var declarations in this block to before it so they retain scope
- * once we wrap everything in a closure.
- */
-
-BlockScoping.prototype.hoistVarDeclarations = function () {
-  traverse(this.block, hoistVarDeclarationsVisitor, this.scope, this);
-};
-
-/**
- * Turn a `VariableDeclaration` into an array of `AssignmentExpressions` with
- * their declarations hoisted to before the closure wrapper.
- *
- * @param {Node} node VariableDeclaration
- * @returns {Array}
- */
-
-BlockScoping.prototype.pushDeclar = function (node) {
-  this.body.push(t.variableDeclaration(node.kind, node.declarations.map(function (declar) {
-    return t.variableDeclarator(declar.id);
-  })));
-
-  var replace = [];
-
-  for (var i = 0; i < node.declarations.length; i++) {
-    var declar = node.declarations[i];
-    if (!declar.init) continue;
-
-    var expr = t.assignmentExpression("=", declar.id, declar.init);
-    replace.push(t.inherits(expr, declar));
-  }
-
-  return replace;
-};
-
-/**
- * Push the closure to the body.
- *
- * @param {Node} ret Identifier
- * @param {Node} call CallExpression
- */
-
-BlockScoping.prototype.build = function (ret, call) {
-  var has = this.has;
-  if (has.hasReturn || has.hasBreakContinue) {
-    this.buildHas(ret, call);
-  } else {
-    this.body.push(t.expressionStatement(call));
-  }
-};
-
-/**
- * Description
- *
- * @param {Node} ret Identifier
- * @param {Node} call CallExpression
- */
-
-BlockScoping.prototype.buildHas = function (ret, call) {
-  var body = this.body;
-
-  body.push(t.variableDeclaration("var", [
-    t.variableDeclarator(ret, call)
-  ]));
-
-  var loopParent = this.loopParent;
-  var retCheck;
-  var has = this.has;
-  var cases = [];
-
-  if (has.hasReturn) {
-    // typeof ret === "object"
-    retCheck = util.template("let-scoping-return", {
-      RETURN: ret
-    });
-  }
-
-  if (has.hasBreakContinue) {
-    if (!loopParent) {
-      throw new Error("Has no loop parent but we're trying to reassign breaks " +
-                      "and continues, something is going wrong here.");
-    }
-
-    for (var key in has.map) {
-      cases.push(t.switchCase(t.literal(key), [has.map[key]]));
-    }
-
-    if (has.hasReturn) {
-      cases.push(t.switchCase(null, [retCheck]));
-    }
-
-    if (cases.length === 1) {
-      var single = cases[0];
-      body.push(t.ifStatement(
-        t.binaryExpression("===", ret, single.test),
-        single.consequent[0]
-      ));
-    } else {
-      body.push(t.switchStatement(ret, cases));
-    }
-  } else {
-    if (has.hasReturn) body.push(retCheck);
-  }
-};

lib/babel/transformation/transformers/es6/classes.js

@@ -1,296 +0,0 @@
-"use strict";
-
-var ReplaceSupers = require("../../helpers/replace-supers");
-var nameMethod    = require("../../helpers/name-method");
-var defineMap     = require("../../helpers/define-map");
-var messages      = require("../../../messages");
-var util          = require("../../../util");
-var t             = require("../../../types");
-
-exports.check = t.isClass;
-
-exports.ClassDeclaration = function (node, parent, scope, file) {
-  return new ClassTransformer(node, file, scope, true).run();
-};
-
-exports.ClassExpression = function (node, parent, scope, file) {
-  if (!node.id) {
-    if (t.isProperty(parent) && parent.value === node && !parent.computed && t.isIdentifier(parent.key)) {
-      // var o = { foo: class {} };
-      node.id = parent.key;
-    }
-
-    if (t.isVariableDeclarator(parent) && t.isIdentifier(parent.id)) {
-      // var foo = class {};
-      node.id = parent.id;
-    }
-  }
-
-  return new ClassTransformer(node, file, scope, false).run();
-};
-
-/**
- * Description
- *
- * @param {Node} node
- * @param {File} file
- * @param {Scope} scope
- * @param {Boolean} isStatement
- */
-
-function ClassTransformer(node, file, scope, isStatement) {
-  this.isStatement = isStatement;
-  this.scope       = scope;
-  this.node        = node;
-  this.file        = file;
-
-  this.hasInstanceMutators = false;
-  this.hasStaticMutators   = false;
-
-  this.instanceMutatorMap = {};
-  this.staticMutatorMap   = {};
-  this.hasConstructor     = false;
-  this.className          = node.id || scope.generateUidIdentifier("class");
-  this.superName          = node.superClass || t.identifier("Function");
-  this.hasSuper           = !!node.superClass;
-  this.isLoose            = file.isLoose("es6.classes");
-}
-
-/**
- * Description
- *
- * @returns {Array}
- */
-
-ClassTransformer.prototype.run = function () {
-  var superName = this.superName;
-  var className = this.className;
-  var file      = this.file;
-
-  //
-
-  var body = this.body = [];
-
-  var constructorBody = t.blockStatement([
-    t.expressionStatement(t.callExpression(file.addHelper("class-call-check"), [
-      t.thisExpression(),
-      className
-    ]))
-  ]);
-  var constructor;
-
-  if (this.node.id) {
-    constructor = t.functionDeclaration(className, [], constructorBody);
-    body.push(constructor);
-  } else {
-    constructor = t.functionExpression(null, [], constructorBody);
-    body.push(t.variableDeclaration("var", [
-      t.variableDeclarator(className, constructor)
-    ]));
-  }
-  this.constructor = constructor;
-
-  var closureParams = [];
-  var closureArgs = [];
-
-  //
-
-  if (this.hasSuper) {
-    closureArgs.push(superName);
-
-    if (!t.isIdentifier(superName)) {
-      superName = this.scope.generateUidBasedOnNode(superName, this.file);
-    }
-
-    closureParams.push(superName);
-
-    this.superName = superName;
-    body.push(t.expressionStatement(t.callExpression(file.addHelper("inherits"), [className, superName])));
-  }
-
-  this.buildBody();
-
-  t.inheritsComments(body[0], this.node);
-
-  var init;
-
-  if (body.length === 1) {
-    // only a constructor so no need for a closure container
-    init = t.toExpression(constructor);
-  } else {
-    body.push(t.returnStatement(className));
-    init = t.callExpression(
-      t.functionExpression(null, closureParams, t.blockStatement(body)),
-      closureArgs
-    );
-  }
-
-  if (this.isStatement) {
-    return t.variableDeclaration("let", [
-      t.variableDeclarator(className, init)
-    ]);
-  } else {
-    return init;
-  }
-};
-
-/**
- * Description
- */
-
-ClassTransformer.prototype.buildBody = function () {
-  var constructor = this.constructor;
-  var className   = this.className;
-  var superName   = this.superName;
-  var classBody   = this.node.body.body;
-  var body        = this.body;
-
-  for (var i = 0; i < classBody.length; i++) {
-    var node = classBody[i];
-    if (t.isMethodDefinition(node)) {
-      var replaceSupers = new ReplaceSupers({
-        methodNode: node,
-        className:  this.className,
-        superName:  this.superName,
-        isStatic:   node.static,
-        isLoose:    this.isLoose,
-        scope:      this.scope,
-        file:       this.file
-      }, true);
-      replaceSupers.replace();
-
-      if (node.key.name === "constructor") {
-        this.pushConstructor(node);
-      } else {
-        this.pushMethod(node);
-      }
-    } else if (t.isPrivateDeclaration(node)) {
-      this.closure = true;
-      body.unshift(node);
-    } else if (t.isClassProperty(node)) {
-      this.pushProperty(node);
-    }
-  }
-
-  // we have no constructor, we have a super, and the super doesn't appear to be falsy
-  if (!this.hasConstructor && this.hasSuper && !t.isFalsyExpression(superName)) {
-    var helperName = "class-super-constructor-call";
-    if (this.isLoose) helperName += "-loose";
-    constructor.body.body.push(util.template(helperName, {
-      CLASS_NAME: className,
-      SUPER_NAME: this.superName
-    }, true));
-  }
-
-  var instanceProps;
-  var staticProps;
-
-  if (this.hasInstanceMutators) {
-    instanceProps = defineMap.build(this.instanceMutatorMap);
-  }
-
-  if (this.hasStaticMutators) {
-    staticProps = defineMap.build(this.staticMutatorMap);
-  }
-
-  if (instanceProps || staticProps) {
-    staticProps = staticProps || t.literal(null);
-
-    var args = [className, staticProps];
-    if (instanceProps) args.push(instanceProps);
-
-    body.push(t.expressionStatement(
-      t.callExpression(this.file.addHelper("prototype-properties"), args)
-    ));
-  }
-};
-
-/**
- * Push a method to its respective mutatorMap.
- *
- * @param {Node} node MethodDefinition
- */
-
-ClassTransformer.prototype.pushMethod = function (node) {
-  var methodName = node.key;
-
-  var kind = node.kind;
-
-  if (kind === "") {
-    nameMethod.property(node, this.file, this.scope);
-
-    if (this.isLoose) {
-      // use assignments instead of define properties for loose classes
-
-      var className = this.className;
-      if (!node.static) className = t.memberExpression(className, t.identifier("prototype"));
-      methodName = t.memberExpression(className, methodName, node.computed);
-
-      var expr = t.expressionStatement(t.assignmentExpression("=", methodName, node.value));
-      t.inheritsComments(expr, node);
-      this.body.push(expr);
-      return;
-    }
-
-    kind = "value";
-  }
-
-  var mutatorMap = this.instanceMutatorMap;
-  if (node.static) {
-    this.hasStaticMutators = true;
-    mutatorMap = this.staticMutatorMap;
-  } else {
-    this.hasInstanceMutators = true;
-  }
-
-  defineMap.push(mutatorMap, methodName, kind, node.computed, node);
-  defineMap.push(mutatorMap, methodName, "enumerable", node.computed, false);
-};
-
-/**
- * Description
- *
- * @param {Node} node
- */
-
-ClassTransformer.prototype.pushProperty = function (node) {
-  if (!node.value) return;
-
-  var key;
-
-  if (node.static) {
-    key = t.memberExpression(this.className, node.key);
-    this.body.push(
-      t.expressionStatement(t.assignmentExpression("=", key, node.value))
-    );
-  } else {
-    key = t.memberExpression(t.thisExpression(), node.key);
-    this.constructor.body.body.unshift(
-      t.expressionStatement(t.assignmentExpression("=", key, node.value))
-    );
-  }
-};
-
-/**
- * Replace the constructor body of our class.
- *
- * @param {Node} method MethodDefinition
- */
-
-ClassTransformer.prototype.pushConstructor = function (method) {
-  if (method.kind) {
-    throw this.file.errorWithNode(method, messages.get("classesIllegalConstructorKind"));
-  }
-
-  var construct = this.constructor;
-  var fn        = method.value;
-
-  this.hasConstructor = true;
-
-  t.inherits(construct, fn);
-  t.inheritsComments(construct, method);
-
-  construct._ignoreUserWhitespace = true;
-  construct.params                = fn.params;
-  construct.body.body             = construct.body.body.concat(fn.body.body);
-};

lib/babel/transformation/transformers/es6/destructuring.js

@@ -1,403 +0,0 @@
-"use strict";
-
-var messages = require("../../../messages");
-var t        = require("../../../types");
-
-exports.check = t.isPattern;
-
-function DestructuringTransformer(opts) {
-  this.blockHoist = opts.blockHoist;
-  this.operator   = opts.operator;
-  this.nodes      = opts.nodes;
-  this.scope      = opts.scope;
-  this.file       = opts.file;
-  this.kind       = opts.kind;
-}
-
-DestructuringTransformer.prototype.buildVariableAssignment = function (id, init) {
-  var op = this.operator;
-  if (t.isMemberExpression(id)) op = "=";
-
-  var node;
-
-  if (op) {
-    node = t.expressionStatement(t.assignmentExpression(op, id, init));
-  } else {
-    node = t.variableDeclaration(this.kind, [
-      t.variableDeclarator(id, init)
-    ]);
-  }
-
-  node._blockHoist = this.blockHoist;
-
-  return node;
-};
-
-DestructuringTransformer.prototype.buildVariableDeclaration = function (id, init) {
-  var declar = t.variableDeclaration("var", [
-    t.variableDeclarator(id, init)
-  ]);
-  declar._blockHoist = this.blockHoist;
-  return declar;
-};
-
-DestructuringTransformer.prototype.push = function (elem, parentId) {
-  if (t.isObjectPattern(elem)) {
-    this.pushObjectPattern(elem, parentId);
-  } else if (t.isArrayPattern(elem)) {
-    this.pushArrayPattern(elem, parentId);
-  } else if (t.isAssignmentPattern(elem)) {
-    this.pushAssignmentPattern(elem, parentId);
-  } else {
-    this.nodes.push(this.buildVariableAssignment(elem, parentId));
-  }
-};
-
-DestructuringTransformer.prototype.pushAssignmentPattern = function (pattern, parentId) {
-  var tempParentId = this.scope.generateUidBasedOnNode(parentId);
-
-  var declar = t.variableDeclaration("var", [
-    t.variableDeclarator(tempParentId, parentId)
-  ]);
-  declar._blockHoist = this.blockHoist;
-  this.nodes.push(declar);
-
-  this.nodes.push(this.buildVariableAssignment(
-    pattern.left,
-    t.conditionalExpression(
-      t.binaryExpression("===", tempParentId, t.identifier("undefined")),
-      pattern.right,
-      tempParentId
-    )
-  ));
-};
-
-DestructuringTransformer.prototype.pushObjectSpread = function (pattern, parentId, prop, i) {
-  // get all the keys that appear in this object before the current spread
-  var keys = [];
-  for (var i2 = 0; i2 < pattern.properties.length; i2++) {
-    var prop2 = pattern.properties[i2];
-
-    if (i2 >= i) break;
-    if (t.isSpreadProperty(prop2)) continue;
-
-    var key = prop2.key;
-    if (t.isIdentifier(key)) {
-      key = t.literal(prop2.key.name);
-    }
-    keys.push(key);
-  }
-  keys = t.arrayExpression(keys);
-
-  var value = t.callExpression(this.file.addHelper("object-without-properties"), [parentId, keys]);
-  this.nodes.push(this.buildVariableAssignment(prop.argument, value));
-};
-
-DestructuringTransformer.prototype.pushObjectProperty = function (prop, parentId) {
-  if (t.isLiteral(prop.key)) prop.computed = true;
-
-  var pattern2   = prop.value;
-  var patternId2 = t.memberExpression(parentId, prop.key, prop.computed);
-
-  if (t.isPattern(pattern2)) {
-    this.push(pattern2, patternId2);
-  } else {
-    this.nodes.push(this.buildVariableAssignment(pattern2, patternId2));
-  }
-};
-
-DestructuringTransformer.prototype.pushObjectPattern = function (pattern, parentId) {
-  if (!pattern.properties.length) {
-    this.nodes.push(t.expressionStatement(
-      t.callExpression(this.file.addHelper("object-destructuring-empty"), [parentId])
-    ));
-  }
-
-  if (pattern.properties.length > 1 && t.isMemberExpression(parentId)) {
-    var temp = this.scope.generateUidBasedOnNode(parentId, this.file);
-    this.nodes.push(this.buildVariableDeclaration(temp, parentId));
-    parentId = temp;
-  }
-
-  for (var i = 0; i < pattern.properties.length; i++) {
-    var prop = pattern.properties[i];
-    if (t.isSpreadProperty(prop)) {
-      this.pushObjectSpread(pattern, parentId, prop, i);
-    } else {
-      this.pushObjectProperty(prop, parentId);
-    }
-  }
-};
-
-var hasRest = function (pattern) {
-  for (var i = 0; i < pattern.elements.length; i++) {
-    if (t.isRestElement(pattern.elements[i])) {
-      return true;
-    }
-  }
-  return false;
-};
-
-DestructuringTransformer.prototype.pushArrayPattern = function (pattern, parentId) {
-  if (!pattern.elements) return;
-
-  // if we have a rest then we need all the elements
-  var count = !hasRest(pattern) && pattern.elements.length;
-
-  var toArray = this.scope.toArray(parentId, count);
-
-  var _parentId = this.scope.generateUidBasedOnNode(parentId);
-  this.nodes.push(this.buildVariableDeclaration(_parentId, toArray));
-  parentId = _parentId;
-
-  this.scope.assignTypeGeneric(parentId.name, "Array");
-
-  for (var i = 0; i < pattern.elements.length; i++) {
-    var elem = pattern.elements[i];
-
-    // hole
-    if (!elem) continue;
-
-    var newPatternId;
-
-    if (t.isRestElement(elem)) {
-      newPatternId = this.scope.toArray(parentId);
-
-      if (i > 0) {
-        newPatternId = t.callExpression(t.memberExpression(newPatternId, t.identifier("slice")), [t.literal(i)]);
-      }
-
-      elem = elem.argument;
-    } else {
-      newPatternId = t.memberExpression(parentId, t.literal(i), true);
-    }
-
-    this.push(elem, newPatternId);
-  }
-};
-
-DestructuringTransformer.prototype.init = function (pattern, parentId) {
-  if (!t.isArrayExpression(parentId) && !t.isMemberExpression(parentId) && !t.isIdentifier(parentId)) {
-    var key = this.scope.generateUidBasedOnNode(parentId);
-    this.nodes.push(this.buildVariableDeclaration(key, parentId));
-    parentId = key;
-  }
-
-  this.push(pattern, parentId);
-};
-
-exports.ForInStatement =
-exports.ForOfStatement = function (node, parent, scope, file) {
-  var left = node.left;
-
-  if (t.isPattern(left)) {
-    // for ({ length: k } in { abc: 3 });
-
-    var temp = scope.generateUidIdentifier("ref");
-
-    node.left = t.variableDeclaration("var", [
-      t.variableDeclarator(temp)
-    ]);
-
-    t.ensureBlock(node);
-
-    node.body.body.unshift(t.variableDeclaration("var", [
-      t.variableDeclarator(left, temp)
-    ]));
-
-    return;
-  }
-
-  if (!t.isVariableDeclaration(left)) return;
-
-  var pattern = left.declarations[0].id;
-  if (!t.isPattern(pattern)) return;
-
-  var key = scope.generateUidIdentifier("ref");
-  node.left = t.variableDeclaration(left.kind, [
-    t.variableDeclarator(key, null)
-  ]);
-
-  var nodes = [];
-
-  var destructuring = new DestructuringTransformer({
-    kind: left.kind,
-    file: file,
-    scope: scope,
-    nodes: nodes
-  });
-
-  destructuring.init(pattern, key);
-
-  t.ensureBlock(node);
-
-  var block = node.body;
-  block.body = nodes.concat(block.body);
-};
-
-exports.Function = function (node, parent, scope, file) {
-  var nodes = [];
-
-  var hasDestructuringTransformer = false;
-
-  node.params = node.params.map(function (pattern, i) {
-    if (!t.isPattern(pattern)) return pattern;
-
-    hasDestructuringTransformer = true;
-    var parentId = scope.generateUidIdentifier("ref");
-
-    var destructuring = new DestructuringTransformer({
-      blockHoist: node.params.length - i,
-      nodes:      nodes,
-      scope:      scope,
-      file:       file,
-      kind:       "var",
-    });
-    destructuring.init(pattern, parentId);
-
-    return parentId;
-  });
-
-  if (!hasDestructuringTransformer) return;
-
-  t.ensureBlock(node);
-
-  var block = node.body;
-  block.body = nodes.concat(block.body);
-};
-
-exports.CatchClause = function (node, parent, scope, file) {
-  var pattern = node.param;
-  if (!t.isPattern(pattern)) return;
-
-  var ref = scope.generateUidIdentifier("ref");
-  node.param = ref;
-
-  var nodes = [];
-
-  var destructuring = new DestructuringTransformer({
-    kind: "let",
-    file: file,
-    scope: scope,
-    nodes: nodes
-  });
-  destructuring.init(pattern, ref);
-
-  node.body.body = nodes.concat(node.body.body);
-
-  return node;
-};
-
-exports.ExpressionStatement = function (node, parent, scope, file) {
-  var expr = node.expression;
-  if (expr.type !== "AssignmentExpression") return;
-  if (!t.isPattern(expr.left)) return;
-  if (file.isConsequenceExpressionStatement(node)) return;
-
-  var nodes = [];
-
-  var ref = scope.generateUidIdentifier("ref");
-  nodes.push(t.variableDeclaration("var", [
-    t.variableDeclarator(ref, expr.right)
-  ]));
-
-  var destructuring = new DestructuringTransformer({
-    operator: expr.operator,
-    file: file,
-    scope: scope,
-    nodes: nodes
-  });
-  destructuring.init(expr.left, ref);
-
-  return nodes;
-};
-
-exports.AssignmentExpression = function (node, parent, scope, file) {
-  if (!t.isPattern(node.left)) return;
-
-  var ref = scope.generateUidIdentifier("temp");
-  scope.push({
-    key: ref.name,
-    id: ref
-  });
-
-  var nodes = [];
-  nodes.push(t.assignmentExpression("=", ref, node.right));
-
-  var destructuring = new DestructuringTransformer({
-    operator: node.operator,
-    file: file,
-    scope: scope,
-    nodes: nodes
-  });
-  destructuring.init(node.left, ref);
-
-  nodes.push(ref);
-
-  return t.toSequenceExpression(nodes, scope);
-};
-
-var variableDeclarationhasPattern = function (node) {
-  for (var i = 0; i < node.declarations.length; i++) {
-    if (t.isPattern(node.declarations[i].id)) {
-      return true;
-    }
-  }
-  return false;
-};
-
-exports.VariableDeclaration = function (node, parent, scope, file) {
-  if (t.isForInStatement(parent) || t.isForOfStatement(parent)) return;
-  if (!variableDeclarationhasPattern(node)) return;
-
-  var nodes = [];
-  var declar;
-
-  for (var i = 0; i < node.declarations.length; i++) {
-    declar = node.declarations[i];
-
-    var patternId = declar.init;
-    var pattern   = declar.id;
-
-    var destructuring = new DestructuringTransformer({
-      nodes: nodes,
-      scope: scope,
-      kind:  node.kind,
-      file:  file
-    });
-
-    if (t.isPattern(pattern) && patternId) {
-      destructuring.init(pattern, patternId);
-
-      if (+i !== node.declarations.length - 1) {
-        // we aren't the last declarator so let's just make the
-        // last transformed node inherit from us
-        t.inherits(nodes[nodes.length - 1], declar);
-      }
-    } else {
-      nodes.push(t.inherits(destructuring.buildVariableAssignment(declar.id, declar.init), declar));
-    }
-  }
-
-  if (!t.isProgram(parent) && !t.isBlockStatement(parent)) {
-    // https://github.com/babel/babel/issues/113
-    // for (let [x] = [0]; false;) {}
-
-    declar = null;
-
-    for (i = 0; i < nodes.length; i++) {
-      node = nodes[i];
-      declar = declar || t.variableDeclaration(node.kind, []);
-
-      if (!t.isVariableDeclaration(node) && declar.kind !== node.kind) {
-        throw file.errorWithNode(node, messages.get("invalidParentForThisNode"));
-      }
-
-      declar.declarations = declar.declarations.concat(node.declarations);
-    }
-
-    return declar;
-  }
-
-  return nodes;
-};

lib/babel/transformation/transformers/es6/for-of.js

@@ -1,106 +0,0 @@
-"use strict";
-
-var messages = require("../../../messages");
-var util     = require("../../../util");
-var t        = require("../../../types");
-
-exports.check = t.isForOfStatement;
-
-exports.ForOfStatement = function (node, parent, scope, file) {
-  var callback = spec;
-  if (file.isLoose("es6.forOf")) callback = loose;
-
-  var build  = callback(node, parent, scope, file);
-  var declar = build.declar;
-  var loop   = build.loop;
-  var block  = loop.body;
-
-  // inherit comments from the original loop
-  t.inheritsComments(loop, node);
-
-  // ensure that it's a block so we can take all its statements
-  t.ensureBlock(node);
-
-  // add the value declaration to the new loop body
-  if (declar) {
-    block.body.push(declar);
-  }
-
-  // push the rest of the original loop body onto our new body
-  block.body = block.body.concat(node.body.body);
-
-  t.inherits(loop, node);
-
-  // todo: find out why this is necessary? #538
-  loop._scopeInfo = node._scopeInfo;
-
-  return loop;
-};
-
-var loose = function (node, parent, scope, file) {
-  var left = node.left;
-  var declar, id;
-
-  if (t.isIdentifier(left) || t.isPattern(left)) {
-    // for (i of test), for ({ i } of test)
-    id = left;
-  } else if (t.isVariableDeclaration(left)) {
-    // for (var i of test)
-    id = scope.generateUidIdentifier("ref");
-    declar = t.variableDeclaration(left.kind, [
-      t.variableDeclarator(left.declarations[0].id, id)
-    ]);
-  } else {
-    throw file.errorWithNode(left, messages.get("unknownForHead", left.type));
-  }
-
-  var loop = util.template("for-of-loose", {
-    LOOP_OBJECT:  scope.generateUidIdentifier("iterator"),
-    IS_ARRAY:     scope.generateUidIdentifier("isArray"),
-    OBJECT:       node.right,
-    INDEX:        scope.generateUidIdentifier("i"),
-    ID:           id
-  });
-
-  if (!declar) {
-    // no declaration so we need to remove the variable declaration at the top of
-    // the for-of-loose template
-    loop.body.body.shift();
-  }
-
-  return {
-    declar: declar,
-    loop:   loop
-  };
-};
-
-var spec = function (node, parent, scope, file) {
-  var left = node.left;
-  var declar;
-
-  var stepKey   = scope.generateUidIdentifier("step");
-  var stepValue = t.memberExpression(stepKey, t.identifier("value"));
-
-  if (t.isIdentifier(left) || t.isPattern(left)) {
-    // for (i of test), for ({ i } of test)
-    declar = t.expressionStatement(t.assignmentExpression("=", left, stepValue));
-  } else if (t.isVariableDeclaration(left)) {
-    // for (var i of test)
-    declar = t.variableDeclaration(left.kind, [
-      t.variableDeclarator(left.declarations[0].id, stepValue)
-    ]);
-  } else {
-    throw file.errorWithNode(left, messages.get("unknownForHead", left.type));
-  }
-
-  var loop = util.template("for-of", {
-    ITERATOR_KEY: scope.generateUidIdentifier("iterator"),
-    STEP_KEY:     stepKey,
-    OBJECT:       node.right
-  });
-
-  return {
-    declar: declar,
-    loop:   loop
-  };
-};

lib/babel/transformation/transformers/es6/parameters.rest.js

@@ -1,76 +0,0 @@
-"use strict";
-
-var util = require("../../../util");
-var t    = require("../../../types");
-
-exports.check = t.isRestElement;
-
-var hasRest = function (node) {
-  return t.isRestElement(node.params[node.params.length - 1]);
-};
-
-exports.Function = function (node, parent, scope) {
-  if (!hasRest(node)) return;
-
-  var rest = node.params.pop().argument;
-
-  var argsId = t.identifier("arguments");
-
-  // otherwise `arguments` will be remapped in arrow functions
-  argsId._ignoreAliasFunctions = true;
-
-  var start = t.literal(node.params.length);
-  var key = scope.generateUidIdentifier("key");
-  var len = scope.generateUidIdentifier("len");
-
-  var arrKey = key;
-  var arrLen = len;
-  if (node.params.length) {
-    // this method has additional params, so we need to subtract
-    // the index of the current argument position from the
-    // position in the array that we want to populate
-    arrKey = t.binaryExpression("-", key, start);
-
-    // we need to work out the size of the array that we're
-    // going to store all the rest parameters
-    //
-    // we need to add a check to avoid constructing the array
-    // with <0 if there are less arguments than params as it'll
-    // cause an error
-    arrLen = t.conditionalExpression(
-      t.binaryExpression(">", len, start),
-      t.binaryExpression("-", len, start),
-      t.literal(0)
-    );
-  }
-
-  // support patterns
-  if (t.isPattern(rest)) {
-    var pattern = rest;
-    rest = scope.generateUidIdentifier("ref");
-
-    // let the destructuring transformer handle this
-    var restDeclar = t.variableDeclaration("var", [
-      t.variableDeclarator(pattern, rest)
-    ]);
-
-    // retain evaluation position
-    restDeclar._blockHoist = node.params.length + 1;
-
-    node.body.body.unshift(restDeclar);
-  }
-
-  scope.assignTypeGeneric(rest.name, "Array");
-
-  var loop = util.template("rest", {
-    ARGUMENTS: argsId,
-    ARRAY_KEY: arrKey,
-    ARRAY_LEN: arrLen,
-    START: start,
-    ARRAY: rest,
-    KEY: key,
-    LEN: len,
-  });
-  loop._blockHoist = node.params.length + 1;
-  node.body.body.unshift(loop);
-};

lib/babel/transformation/transformers/es6/properties.shorthand.js

@@ -1,21 +0,0 @@
-"use strict";
-
-var nameMethod = require("../../helpers/name-method");
-var t          = require("../../../types");
-var clone      = require("lodash/lang/clone");
-
-exports.check = function (node) {
-  return t.isProperty(node) && (node.method || node.shorthand);
-};
-
-exports.Property = function (node, parent, scope, file) {
-  if (node.method) {
-    node.method = false;
-    nameMethod.property(node, file, scope);
-  }
-
-  if (node.shorthand) {
-    node.shorthand = false;
-    node.key = t.removeComments(clone(node.key));
-  }
-};

lib/babel/transformation/transformers/es6/tail-call.js

@@ -1,367 +0,0 @@
-"use strict";
-
-var reduceRight = require("lodash/collection/reduceRight");
-var messages    = require("../../../messages");
-var flatten     = require("lodash/array/flatten");
-var util        = require("../../../util");
-var map         = require("lodash/collection/map");
-var t           = require("../../../types");
-
-function returnBlock(expr) {
-  return t.blockStatement([t.returnStatement(expr)]);
-}
-
-function TailCallTransformer(node, scope, file) {
-  this.hasTailRecursion = false;
-  this.needsArguments   = false;
-  this.setsArguments    = false;
-  this.needsThis        = false;
-  this.ownerId          = node.id;
-  this.vars             = [];
-
-  this.scope = scope;
-  this.file  = file;
-  this.node  = node;
-}
-
-TailCallTransformer.prototype.getArgumentsId = function () {
-  return this.argumentsId = this.argumentsId || this.scope.generateUidIdentifier("arguments");
-};
-
-TailCallTransformer.prototype.getThisId = function () {
-  return this.thisId = this.thisId || this.scope.generateUidIdentifier("this");
-};
-
-TailCallTransformer.prototype.getLeftId = function () {
-  return this.leftId = this.leftId || this.scope.generateUidIdentifier("left");
-};
-
-TailCallTransformer.prototype.getFunctionId = function () {
-  return this.functionId = this.functionId || this.scope.generateUidIdentifier("function");
-};
-
-TailCallTransformer.prototype.getParams = function () {
-  var params = this.params;
-
-  if (!params) {
-    params = this.node.params;
-    this.paramDecls = [];
-
-    for (var i = 0; i < params.length; i++) {
-      var param = params[i];
-      if (!param._isDefaultPlaceholder) {
-        this.paramDecls.push(t.variableDeclarator(
-          param,
-          params[i] = this.scope.generateUidIdentifier("x")
-        ));
-      }
-    }
-  }
-
-  return this.params = params;
-};
-
-TailCallTransformer.prototype.hasDeopt = function () {
-  // check if the ownerId has been reassigned, if it has then it's not safe to
-  // perform optimisations
-  var ownerIdInfo = this.scope.getBindingInfo(this.ownerId.name);
-  return ownerIdInfo && ownerIdInfo.reassigned;
-};
-
-TailCallTransformer.prototype.run = function () {
-  var scope = this.scope;
-  var node  = this.node;
-
-  // only tail recursion can be optimized as for now, so we can skip anonymous
-  // functions entirely
-  var ownerId = this.ownerId;
-  if (!ownerId) return;
-
-  // traverse the function and look for tail recursion
-  scope.traverse(node, firstPass, this);
-
-  if (!this.hasTailRecursion) return;
-
-  if (this.hasDeopt()) {
-    this.file.logDeopt(node, messages.get("tailCallReassignmentDeopt"));
-    return;
-  }
-
-  //
-
-  scope.traverse(node, secondPass, this);
-
-  if (!this.needsThis || !this.needsArguments) {
-    scope.traverse(node, thirdPass, this);
-  }
-
-  var body = t.ensureBlock(node).body;
-
-  if (this.vars.length > 0) {
-    var declarations = flatten(map(this.vars, function (decl) {
-      return decl.declarations;
-    }, this));
-    var statement = reduceRight(declarations, function (expr, decl) {
-      return t.assignmentExpression("=", decl.id, expr);
-    }, t.identifier("undefined"));
-    body.unshift(t.expressionStatement(statement));
-  }
-
-  var paramDecls = this.paramDecls;
-  if (paramDecls.length > 0) {
-    body.unshift(t.variableDeclaration("var", paramDecls));
-  }
-
-  node.body = util.template("tail-call-body", {
-    THIS_ID:       this.thisId,
-    ARGUMENTS_ID:  this.argumentsId,
-    FUNCTION_ID:   this.getFunctionId(),
-    BLOCK:         node.body
-  });
-
-  var topVars = [];
-
-  if (this.needsThis) {
-    topVars.push(t.variableDeclarator(this.getThisId(), t.thisExpression()));
-  }
-
-  if (this.needsArguments || this.setsArguments) {
-    var decl = t.variableDeclarator(this.getArgumentsId());
-    if (this.needsArguments) {
-      decl.init = t.identifier("arguments");
-    }
-    topVars.push(decl);
-  }
-
-  var leftId = this.leftId;
-  if (leftId) {
-    topVars.push(t.variableDeclarator(leftId));
-  }
-
-  if (topVars.length > 0) {
-    node.body.body.unshift(t.variableDeclaration("var", topVars));
-  }
-};
-
-TailCallTransformer.prototype.subTransform = function (node) {
-  if (!node) return;
-
-  var handler = this["subTransform" + node.type];
-  if (handler) return handler.call(this, node);
-};
-
-TailCallTransformer.prototype.subTransformConditionalExpression = function (node) {
-  var callConsequent = this.subTransform(node.consequent);
-  var callAlternate = this.subTransform(node.alternate);
-  if (!callConsequent && !callAlternate) {
-    return;
-  }
-
-  // if ternary operator had tail recursion in value, convert to optimized if-statement
-  node.type = "IfStatement";
-  node.consequent = callConsequent ? t.toBlock(callConsequent) : returnBlock(node.consequent);
-
-  if (callAlternate) {
-    node.alternate = t.isIfStatement(callAlternate) ? callAlternate : t.toBlock(callAlternate);
-  } else {
-    node.alternate = returnBlock(node.alternate);
-  }
-
-  return [node];
-};
-
-TailCallTransformer.prototype.subTransformLogicalExpression = function (node) {
-  // only call in right-value of can be optimized
-  var callRight = this.subTransform(node.right);
-  if (!callRight) return;
-
-  // cache left value as it might have side-effects
-  var leftId = this.getLeftId();
-  var testExpr = t.assignmentExpression(
-    "=",
-    leftId,
-    node.left
-  );
-
-  if (node.operator === "&&") {
-    testExpr = t.unaryExpression("!", testExpr);
-  }
-
-  return [t.ifStatement(testExpr, returnBlock(leftId))].concat(callRight);
-};
-
-TailCallTransformer.prototype.subTransformSequenceExpression = function (node) {
-  var seq = node.expressions;
-
-  // only last element can be optimized
-  var lastCall = this.subTransform(seq[seq.length - 1]);
-  if (!lastCall) {
-    return;
-  }
-
-  // remove converted expression from sequence
-  // and convert to regular expression if needed
-  if (--seq.length === 1) {
-    node = seq[0];
-  }
-
-  return [t.expressionStatement(node)].concat(lastCall);
-};
-
-TailCallTransformer.prototype.subTransformCallExpression = function (node) {
-  var callee = node.callee, thisBinding, args;
-
-  if (t.isMemberExpression(callee, { computed: false }) && t.isIdentifier(callee.property)) {
-    switch (callee.property.name) {
-      case "call":
-        args = t.arrayExpression(node.arguments.slice(1));
-        break;
-
-      case "apply":
-        args = node.arguments[1] || t.identifier("undefined");
-        break;
-
-      default:
-        return;
-    }
-
-    thisBinding = node.arguments[0];
-    callee = callee.object;
-  }
-
-  // only tail recursion can be optimized as for now
-  if (!t.isIdentifier(callee) || !this.scope.bindingIdentifierEquals(callee.name, this.ownerId)) {
-    return;
-  }
-
-  this.hasTailRecursion = true;
-
-  if (this.hasDeopt()) return;
-
-  var body = [];
-
-  if (!t.isThisExpression(thisBinding)) {
-    body.push(t.expressionStatement(t.assignmentExpression(
-      "=",
-      this.getThisId(),
-      thisBinding || t.identifier("undefined")
-    )));
-  }
-
-  if (!args) {
-    args = t.arrayExpression(node.arguments);
-  }
-
-  var argumentsId = this.getArgumentsId();
-  var params = this.getParams();
-
-  body.push(t.expressionStatement(t.assignmentExpression(
-    "=",
-    argumentsId,
-    args
-  )));
-
-  var i, param;
-
-  if (t.isArrayExpression(args)) {
-    var elems = args.elements;
-    for (i = 0; i < elems.length && i < params.length; i++) {
-      param = params[i];
-      var elem = elems[i] || (elems[i] = t.identifier("undefined"));
-      if (!param._isDefaultPlaceholder) {
-        elems[i] = t.assignmentExpression("=", param, elem);
-      }
-    }
-  } else {
-    this.setsArguments = true;
-    for (i = 0; i < params.length; i++) {
-      param = params[i];
-      if (!param._isDefaultPlaceholder) {
-        body.push(t.expressionStatement(t.assignmentExpression(
-          "=",
-          param,
-          t.memberExpression(argumentsId, t.literal(i), true)
-        )));
-      }
-    }
-  }
-
-  body.push(t.continueStatement(this.getFunctionId()));
-
-  return body;
-};
-
-// looks for and replaces tail recursion calls
-var firstPass = {
-  enter: function (node, parent, scope, state) {
-    if (t.isIfStatement(node)) {
-      if (t.isReturnStatement(node.alternate)) {
-        t.ensureBlock(node, "alternate");
-      }
-
-      if (t.isReturnStatement(node.consequent)) {
-        t.ensureBlock(node, "consequent");
-      }
-    } else if (t.isReturnStatement(node)) {
-      this.skip();
-      return state.subTransform(node.argument);
-    } else if (t.isTryStatement(parent)) {
-      if (node === parent.block) {
-        this.skip();
-      } else if (parent.finalizer && node !== parent.finalizer) {
-        this.skip();
-      }
-    } else if (t.isFunction(node)) {
-      this.skip();
-    } else if (t.isVariableDeclaration(node)) {
-      this.skip();
-      state.vars.push(node);
-    }
-  }
-};
-
-// hoists up function declarations, replaces `this` and `arguments` and marks
-// them as needed
-var secondPass = {
-  enter: function (node, parent, scope, state) {
-    if (t.isThisExpression(node)) {
-      state.needsThis = true;
-      return state.getThisId();
-    } else if (t.isReferencedIdentifier(node, parent, { name: "arguments" })) {
-      state.needsArguments = true;
-      return state.getArgumentsId();
-    } else if (t.isFunction(node)) {
-      this.skip();
-      if (t.isFunctionDeclaration(node)) {
-        node = t.variableDeclaration("var", [
-          t.variableDeclarator(node.id, t.toExpression(node))
-        ]);
-        node._blockHoist = 2;
-        return node;
-      }
-    }
-  }
-};
-
-// optimizes recursion by removing `this` and `arguments` if they aren't used
-var thirdPass = {
-  enter: function (node, parent, scope, state) {
-    if (!t.isExpressionStatement(node)) return;
-
-    var expr = node.expression;
-    if (!t.isAssignmentExpression(expr)) return;
-
-    if (!state.needsThis && expr.left === state.getThisId()) {
-      this.remove();
-    } else if (!state.needsArguments && expr.left === state.getArgumentsId() && t.isArrayExpression(expr.right)) {
-      return map(expr.right.elements, function (elem) {
-        return t.expressionStatement(elem);
-      });
-    }
-  }
-};
-
-exports.Function = function (node, parent, scope, file) {
-  var tailCall = new TailCallTransformer(node, scope, file);
-  tailCall.run();
-};

lib/babel/transformation/transformers/es6/unicode-regex.js

@@ -1,21 +0,0 @@
-"use strict";
-
-var rewritePattern = require("regexpu/rewrite-pattern");
-var pull           = require("lodash/array/pull");
-var t              = require("../../../types");
-
-exports.check = function (node) {
-  return t.isLiteral(node) && node.regex && node.regex.flags.indexOf("u") >= 0;
-};
-
-exports.Literal = function (node) {
-  var regex = node.regex;
-  if (!regex) return;
-
-  var flags = regex.flags.split("");
-  if (regex.flags.indexOf("u") < 0) return;
-  pull(flags, "u");
-
-  regex.pattern = rewritePattern(regex.pattern, regex.flags);
-  regex.flags   = flags.join("");
-};

lib/babel/transformation/transformers/internal/block-hoist.js

@@ -1,36 +0,0 @@
-"use strict";
-
-var useStrict = require("../../helpers/use-strict");
-var groupBy   = require("lodash/collection/groupBy");
-var flatten   = require("lodash/array/flatten");
-var values    = require("lodash/object/values");
-
-// Priority:
-//
-//  - 0 We want this to be at the **very** bottom
-//  - 1 Default node position
-//  - 2 Priority over normal nodes
-//  - 3 We want this to be at the **very** top
-
-exports.BlockStatement =
-exports.Program = {
-  exit: function (node) {
-    var hasChange = false;
-    for (var i = 0; i < node.body.length; i++) {
-      var bodyNode = node.body[i];
-      if (bodyNode && bodyNode._blockHoist != null) hasChange = true;
-    }
-    if (!hasChange) return;
-
-    useStrict.wrap(node, function () {
-      var nodePriorities = groupBy(node.body, function (bodyNode) {
-        var priority = bodyNode._blockHoist;
-        if (priority == null) priority = 1;
-        if (priority === true) priority = 2;
-        return priority;
-      });
-
-      node.body = flatten(values(nodePriorities).reverse());
-    });
-  }
-};

lib/babel/transformation/transformers/minification/remove-debugger.js

@@ -1,9 +0,0 @@
-var t = require("../../../types");
-
-exports.optional = true;
-
-exports.ExpressionStatement = function (node) {
-  if (t.isIdentifier(node.expression, { name: "debugger" })) {
-    this.remove();
-  }
-};

lib/babel/transformation/transformers/other/async-to-generator.js

@@ -1,14 +0,0 @@
-"use strict";
-
-var remapAsyncToGenerator = require("../../helpers/remap-async-to-generator");
-var bluebirdCoroutines    = require("./bluebird-coroutines");
-
-exports.optional = true;
-
-exports.manipulateOptions = bluebirdCoroutines.manipulateOptions;
-
-exports.Function = function (node, parent, scope, file) {
-  if (!node.async || node.generator) return;
-
-  return remapAsyncToGenerator(node, file.addHelper("async-to-generator"), scope);
-};

lib/babel/transformation/transformers/other/flow.js

@@ -1,13 +0,0 @@
-var t = require("../../../types");
-
-exports.TypeCastExpression = function (node) {
-  return node.expression;
-};
-
-exports.ImportDeclaration = function (node) {
-  if (node.isType) this.remove();
-};
-
-exports.ExportDeclaration = function (node) {
-  if (t.isTypeAlias(node.declaration)) this.remove();
-};

lib/babel/transformation/transformers/other/react.js

@@ -1,20 +0,0 @@
-"use strict";
-
-var react = require("../../helpers/react");
-var t     = require("../../../types");
-
-require("../../helpers/build-react-transformer")(exports, {
-  pre: function (state) {
-    var tagName = state.tagName;
-    var args    = state.args;
-    if (react.isCompatTag(tagName)) {
-      args.push(t.literal(tagName));
-    } else {
-      args.push(state.tagExpr);
-    }
-  },
-
-  post: function (state) {
-    state.callee = t.memberExpression(t.identifier("React"), t.identifier("createElement"));
-  }
-});

lib/babel/transformation/transformers/other/regenerator.js

@@ -1,15 +0,0 @@
-"use strict";
-
-var regenerator = require("regenerator-babel");
-var t           = require("../../../types");
-
-exports.check = function (node) {
-  return t.isFunction(node) && (node.async || node.generator);
-};
-
-exports.Program = {
-  enter: function (ast) {
-    regenerator.transform(ast);
-    this.stop();
-  }
-};

lib/babel/transformation/transformers/other/use-strict.js

@@ -1,26 +0,0 @@
-"use strict";
-
-var useStrict = require("../../helpers/use-strict");
-var messages  = require("../../../messages");
-var t         = require("../../../types");
-
-exports.Program = function (program) {
-  if (!useStrict.has(program)) {
-    program.body.unshift(t.expressionStatement(t.literal("use strict")));
-  }
-};
-
-exports.FunctionDeclaration =
-exports.FunctionExpression = function () {
-  this.skip();
-};
-
-exports.ThisExpression = function () {
-  return t.identifier("undefined");
-};
-
-exports.CallExpression = function (node, parent, scope, file) {
-  if (t.isIdentifier(node.callee, { name: "eval" })) {
-    throw file.errorWithNode(node, messages.get("evalInStrictMode"));
-  }
-};

lib/babel/traversal/context.js

@@ -1,54 +0,0 @@
-"use strict";
-
-module.exports = TraversalContext;
-
-var TraversalPath = require("./path");
-var flatten       = require("lodash/array/flatten");
-var compact       = require("lodash/array/compact");
-
-function TraversalContext(scope, opts, state, parentPath) {
-  this.shouldFlatten = false;
-  this.parentPath    = parentPath;
-
-  this.scope = scope;
-  this.state = state;
-  this.opts  = opts;
-}
-
-TraversalContext.prototype.flatten = function () {
-  this.shouldFlatten = true;
-};
-
-TraversalContext.prototype.visitNode = function (node, obj, key) {
-  var iteration = new TraversalPath(this, node, obj, key);
-  return iteration.visit();
-};
-
-TraversalContext.prototype.visit = function (node, key) {
-  var nodes = node[key];
-  if (!nodes) return;
-
-  if (!Array.isArray(nodes)) {
-    return this.visitNode(node, node, key);
-  }
-
-  // nothing to traverse!
-  if (nodes.length === 0) {
-    return;
-  }
-
-  for (var i = 0; i < nodes.length; i++) {
-    if (nodes[i] && this.visitNode(node, nodes, i)) {
-      return true;
-    }
-  }
-
-  if (this.shouldFlatten) {
-    node[key] = flatten(node[key]);
-
-    if (key === "body") {
-      // we can safely compact this
-      node[key] = compact(node[key]);
-    }
-  }
-};

lib/babel/traversal/path.js

@@ -1,156 +0,0 @@
-"use strict";
-
-module.exports = TraversalPath;
-
-/* jshint maxparams:7 */
-
-var traverse = require("./index");
-var includes = require("lodash/collection/includes");
-var Scope    = require("./scope");
-var t        = require("../types");
-
-function TraversalPath(context, parent, obj, key) {
-  this.shouldRemove = false;
-  this.shouldSkip   = false;
-  this.shouldStop   = false;
-
-  this.parentPath = context.parentPath;
-  this.context    = context;
-  this.state      = this.context.state;
-  this.opts       = this.context.opts;
-
-  this.key     = key;
-  this.obj     = obj;
-
-  this.parent = parent;
-  this.scope  = TraversalPath.getScope(this.getNode(), parent, context.scope);
-  this.state  = context.state;
-}
-
-TraversalPath.prototype.remove = function () {
-  this.shouldRemove = true;
-  this.shouldSkip   = true;
-};
-
-TraversalPath.prototype.skip = function () {
-  this.shouldSkip = true;
-};
-
-TraversalPath.prototype.stop = function () {
-  this.shouldStop = true;
-  this.shouldSkip = true;
-};
-
-TraversalPath.prototype.flatten = function () {
-  this.context.flatten();
-};
-
-TraversalPath.getScope = function (node, parent, scope) {
-  var ourScope = scope;
-
-  // we're entering a new scope so let's construct it!
-  if (t.isScope(node, parent)) {
-    ourScope = new Scope(node, parent, scope);
-  }
-
-  return ourScope;
-};
-
-TraversalPath.prototype.maybeRemove = function () {
-  if (this.shouldRemove) {
-    this.setNode(null);
-    this.flatten();
-  }
-};
-
-TraversalPath.prototype.setNode = function (val) {
-  return this.obj[this.key] = val;
-};
-
-TraversalPath.prototype.getNode = function () {
-  return this.obj[this.key];
-};
-
-TraversalPath.prototype.replaceNode = function (replacement) {
-  var isArray = Array.isArray(replacement);
-
-  // inherit comments from original node to the first replacement node
-  var inheritTo = replacement;
-  if (isArray) inheritTo = replacement[0];
-  if (inheritTo) t.inheritsComments(inheritTo, this.getNode());
-
-  // replace the node
-  this.setNode(replacement);
-
-  var file = this.scope && this.scope.file;
-  if (file) {
-    if (isArray) {
-      for (var i = 0; i < replacement.length; i++) {
-        file.checkNode(replacement[i], this.scope);
-      }
-    } else {
-      file.checkNode(replacement, this.scope);
-    }
-  }
-
-  // we're replacing a statement or block node with an array of statements so we better
-  // ensure that it's a block
-  if (isArray) {
-    if (includes(t.STATEMENT_OR_BLOCK_KEYS, this.key) && !t.isBlockStatement(this.obj)) {
-      t.ensureBlock(this.obj, this.key);
-    }
-
-    this.flatten();
-  }
-};
-
-TraversalPath.prototype.call = function (key) {
-  var node = this.getNode();
-  if (!node) return;
-
-  var opts = this.opts;
-  var fn   = opts[key] || opts;
-  if (opts[node.type]) fn = opts[node.type][key] || fn;
-
-  var replacement = fn.call(this, node, this.parent, this.scope, this.state);
-
-  if (replacement) {
-    this.replaceNode(replacement);
-    node = replacement;
-  }
-
-  this.maybeRemove();
-
-  return node;
-};
-
-TraversalPath.prototype.visit = function () {
-  var opts = this.opts;
-  var node = this.getNode();
-
-  // type is blacklisted
-  if (opts.blacklist && opts.blacklist.indexOf(node.type) > -1) {
-    return;
-  }
-
-  this.call("enter");
-
-  if (this.shouldSkip) {
-    return this.shouldStop;
-  }
-
-  node = this.getNode();
-
-  if (Array.isArray(node)) {
-    // traverse over these replacement nodes we purposely don't call exitNode
-    // as the original node has been destroyed
-    for (var i = 0; i < node.length; i++) {
-      traverse.node(node[i], opts, this.scope, this.state, this);
-    }
-  } else {
-    traverse.node(node, opts, this.scope, this.state, this);
-    this.call("exit");
-  }
-
-  return this.shouldStop;
-};

lib/babel/traversal/scope.js

@@ -1,646 +0,0 @@
-"use strict";
-
-module.exports = Scope;
-
-var includes = require("lodash/collection/includes");
-var traverse = require("./index");
-var defaults = require("lodash/object/defaults");
-var messages = require("../messages");
-var globals  = require("globals");
-var flatten  = require("lodash/array/flatten");
-var extend   = require("lodash/object/extend");
-var object   = require("../helpers/object");
-var each     = require("lodash/collection/each");
-var t        = require("../types");
-
-/**
- * This searches the current "scope" and collects all references/bindings
- * within.
- *
- * @param {Node} block
- * @param {Node} parentBlock
- * @param {Scope} [parent]
- * @param {File} [file]
- */
-
-function Scope(block, parentBlock, parent, file) {
-  this.parent = parent;
-  this.file   = parent ? parent.file : file;
-
-  this.parentBlock = parentBlock;
-  this.block       = block;
-
-  this.crawl();
-}
-
-Scope.globals = flatten([globals.builtin, globals.browser, globals.node].map(Object.keys));
-
-/**
- * Description
- *
- * @param {Object} node
- * @param {Object} opts
- * @param [state]
- */
-
-Scope.prototype.traverse = function (node, opts, state) {
-  traverse(node, opts, this, state);
-};
-
-/**
- * Description
- *
- * @param {String} [name="temp"]
- */
-
-Scope.prototype.generateTemp = function (name) {
-  var id = this.generateUidIdentifier(name || "temp");
-  this.push({
-    key: id.name,
-    id: id
-  });
-  return id;
-};
-
-/**
- * Description
- *
- * @param {String} name
- */
-
-Scope.prototype.generateUidIdentifier = function (name) {
-  var id = t.identifier(this.generateUid(name));
-  this.getFunctionParent().registerBinding("uid", id);
-  return id;
-};
-
-/**
- * Description
- *
- * @param {String} name
- */
-
-Scope.prototype.generateUid = function (name) {
-  name = t.toIdentifier(name).replace(/^_+/, "");
-
-  var uid;
-  var i = 0;
-  do {
-    uid = this._generateUid(name, i);
-    i++;
-  } while (this.hasBinding(uid) || this.hasGlobal(uid));
-  return uid;
-};
-
-Scope.prototype._generateUid = function (name, i) {
-  var id = name;
-  if (i > 1) id += i;
-  return "_" + id;
-};
-
-/*
- * Description
- *
- * @param {Object} parent
- * @returns {Object}
- */
-
-Scope.prototype.generateUidBasedOnNode = function (parent) {
-  var node = parent;
-
-  if (t.isAssignmentExpression(parent)) {
-    node = parent.left;
-  } else if (t.isVariableDeclarator(parent)) {
-    node = parent.id;
-  } else if (t.isProperty(node)) {
-    node = node.key;
-  }
-
-  var parts = [];
-
-  var add = function (node) {
-    if (t.isMemberExpression(node)) {
-      add(node.object);
-      add(node.property);
-    } else if (t.isIdentifier(node)) {
-      parts.push(node.name);
-    } else if (t.isLiteral(node)) {
-      parts.push(node.value);
-    } else if (t.isCallExpression(node)) {
-      add(node.callee);
-    }
-  };
-
-  add(node);
-
-  var id = parts.join("$");
-  id = id.replace(/^_/, "") || "ref";
-
-  return this.generateUidIdentifier(id);
-};
-
-/**
- * Description
- *
- * @param {Object} node
- * @returns {Object}
- */
-
-Scope.prototype.generateTempBasedOnNode = function (node) {
-  if (t.isIdentifier(node) && this.hasBinding(node.name)) {
-    return null;
-  }
-
-  var id = this.generateUidBasedOnNode(node);
-  this.push({
-    key: id.name,
-    id: id
-  });
-  return id;
-};
-
-Scope.prototype.checkBlockScopedCollisions = function (kind, name, id) {
-  var local = this.getOwnBindingInfo(name);
-  if (!local) return;
-
-  if (kind === "param") return;
-  if (kind === "hoisted" && local.kind === "let") return;
-
-  if (local.kind === "let" || local.kind === "const" || local.kind === "module") {
-    throw this.file.errorWithNode(id, messages.get("scopeDuplicateDeclaration", name), TypeError);
-  }
-};
-
-Scope.prototype.rename = function (oldName, newName) {
-  newName = newName || this.generateUidIdentifier(oldName).name;
-
-  var info = this.getBindingInfo(oldName);
-  if (!info) return;
-
-  var binding = info.identifier;
-  var scope = info.scope;
-
-  scope.traverse(scope.block, {
-    enter: function (node, parent, scope) {
-      if (t.isReferencedIdentifier(node, parent) && node.name === oldName) {
-        node.name = newName;
-      } else if (t.isDeclaration(node)) {
-        var ids = t.getBindingIdentifiers(node);
-        for (var name in ids) {
-          if (name === oldName) ids[name].name = newName;
-        }
-      } else if (t.isScope(node, parent)) {
-        if (!scope.bindingIdentifierEquals(oldName, binding)) {
-          this.skip();
-        }
-      }
-    }
-  });
-
-  this.clearOwnBinding(oldName);
-  scope.bindings[newName] = info;
-
-  binding.name = newName;
-};
-
-Scope.prototype.inferType = function (node) {
-  var target;
-
-  if (t.isVariableDeclarator(node)) {
-    target = node.init;
-  }
-
-  if (t.isArrayExpression(target)) {
-    return t.genericTypeAnnotation(t.identifier("Array"));
-  }
-
-  if (t.isObjectExpression(target)) {
-    return;
-  }
-
-  if (t.isLiteral(target)) {
-    return;
-  }
-
-  if (t.isCallExpression(target) && t.isIdentifier(target.callee)) {
-    var funcInfo = this.getBindingInfo(target.callee.name);
-    if (funcInfo) {
-      var funcNode = funcInfo.node;
-      return !funcInfo.reassigned && t.isFunction(funcNode) && node.returnType;
-    }
-  }
-
-  if (t.isIdentifier(target)) {
-    return;
-  }
-};
-
-Scope.prototype.isTypeGeneric = function (name, genericName) {
-  var info = this.getBindingInfo(name);
-  if (!info) return false;
-
-  var type = info.typeAnnotation;
-  return t.isGenericTypeAnnotation(type) && t.isIdentifier(type.id, { name: genericName });
-};
-
-Scope.prototype.assignTypeGeneric = function (name, type) {
-  this.assignType(name, t.genericTypeAnnotation(t.identifier(type)));
-};
-
-Scope.prototype.assignType = function (name, type) {
-  var info = this.getBindingInfo(name);
-  if (!info) return;
-
-  info.identifier.typeAnnotation = info.typeAnnotation = type;
-};
-
-Scope.prototype.getTypeAnnotation = function (name, id, node) {
-  var info = {
-    annotation: null,
-    inferred: false
-  };
-
-  var type;
-
-  if (id.typeAnnotation) {
-    type = id.typeAnnotation;
-  }
-
-  if (!type) {
-    info.inferred = true;
-    type = this.inferType(node);
-  }
-
-  if (type) {
-    if (t.isTypeAnnotation(type)) type = type.typeAnnotation;
-    info.annotation = type;
-  }
-
-  return info;
-};
-
-Scope.prototype.toArray = function (node, i) {
-  var file = this.file;
-
-  if (t.isIdentifier(node) && this.isTypeGeneric(node.name, "Array")) {
-    return node;
-  }
-
-  if (t.isArrayExpression(node)) {
-    return node;
-  }
-
-  if (t.isIdentifier(node, { name: "arguments" })) {
-    return t.callExpression(t.memberExpression(file.addHelper("slice"), t.identifier("call")), [node]);
-  }
-
-  var helperName = "to-array";
-  var args = [node];
-  if (i === true) {
-    helperName = "to-consumable-array";
-  } else if (i) {
-    args.push(t.literal(i));
-    helperName = "sliced-to-array";
-  }
-  return t.callExpression(file.addHelper(helperName), args);
-};
-
-Scope.prototype.clearOwnBinding = function (name) {
-  delete this.bindings[name];
-};
-
-Scope.prototype.registerDeclaration = function (node) {
-  if (t.isFunctionDeclaration(node)) {
-    this.registerBinding("hoisted", node);
-  } else if (t.isVariableDeclaration(node)) {
-    for (var i = 0; i < node.declarations.length; i++) {
-      this.registerBinding(node.kind, node.declarations[i]);
-    }
-  } else if (t.isClassDeclaration(node)) {
-    this.registerBinding("let", node);
-  } else if (t.isImportDeclaration(node) || t.isExportDeclaration(node)) {
-    this.registerBinding("module", node);
-  } else {
-    this.registerBinding("unknown", node);
-  }
-};
-
-Scope.prototype.registerBindingReassignment = function (node) {
-  var ids = t.getBindingIdentifiers(node);
-  for (var name in ids) {
-    var info = this.getBindingInfo(name);
-    if (info) {
-      info.reassigned = true;
-
-      if (info.typeAnnotationInferred) {
-        // destroy the inferred typeAnnotation
-        info.typeAnnotation = null;
-      }
-    }
-  }
-};
-
-Scope.prototype.registerBinding = function (kind, node) {
-  if (!kind) throw new ReferenceError("no `kind`");
-
-  var ids = t.getBindingIdentifiers(node);
-
-  for (var name in ids) {
-    var id = ids[name];
-
-    this.checkBlockScopedCollisions(kind, name, id);
-
-    var typeInfo = this.getTypeAnnotation(name, id, node);
-
-    this.bindings[name] = {
-      typeAnnotationInferred: typeInfo.inferred,
-      typeAnnotation:         typeInfo.annotation,
-      reassigned:             false,
-      identifier:             id,
-      scope:                  this,
-      node:                   node,
-      kind:                   kind
-    };
-  }
-};
-
-Scope.prototype.registerVariableDeclaration = function (declar) {
-  var declars = declar.declarations;
-  for (var i = 0; i < declars.length; i++) {
-    this.registerBinding(declars[i], declar.kind);
-  }
-};
-
-var functionVariableVisitor = {
-  enter: function (node, parent, scope, state) {
-    if (t.isFor(node)) {
-      each(t.FOR_INIT_KEYS, function (key) {
-        var declar = node[key];
-        if (t.isVar(declar)) state.scope.registerBinding("var", declar);
-      });
-    }
-
-    // this block is a function so we'll stop since none of the variables
-    // declared within are accessible
-    if (t.isFunction(node)) return this.skip();
-
-    // function identifier doesn't belong to this scope
-    if (state.blockId && node === state.blockId) return;
-
-    // delegate block scope handling to the `blockVariableVisitor`
-    if (t.isBlockScoped(node)) return;
-
-    // this will be hit again once we traverse into it after this iteration
-    if (t.isExportDeclaration(node) && t.isDeclaration(node.declaration)) return;
-
-    // we've ran into a declaration!
-    if (t.isDeclaration(node)) state.scope.registerDeclaration(node);
-  }
-};
-
-Scope.prototype.addGlobal = function (node) {
-  this.globals[node.name] = node;
-};
-
-Scope.prototype.hasGlobal = function (name) {
-  var scope = this;
-
-  do {
-    if (scope.globals[name]) return true;
-  } while (scope = scope.parent);
-
-  return false;
-};
-
-var programReferenceVisitor = {
-  enter: function (node, parent, scope, state) {
-    if (t.isReferencedIdentifier(node, parent) && !scope.hasBinding(node.name)) {
-      state.addGlobal(node);
-    } else if (t.isLabeledStatement(node)) {
-      state.addGlobal(node);
-    } else if (t.isAssignmentExpression(node) || t.isUpdateExpression(node) || (t.isUnaryExpression(node) && node.operator === "delete")) {
-      scope.registerBindingReassignment(node);
-    }
-  }
-};
-
-var blockVariableVisitor = {
-  enter: function (node, parent, scope, state) {
-    if (t.isFunctionDeclaration(node) || t.isBlockScoped(node)) {
-      state.registerDeclaration(node);
-    } else if (t.isScope(node, parent)) {
-      this.skip();
-    }
-  }
-};
-
-Scope.prototype.crawl = function () {
-  var block  = this.block;
-  var i;
-
-  //
-
-  var info = block._scopeInfo;
-  if (info) {
-    extend(this, info);
-    return;
-  }
-
-  info = block._scopeInfo = {
-    bindings: object(),
-    globals:  object()
-  };
-
-  extend(this, info);
-
-  // ForStatement - left, init
-
-  if (t.isLoop(block)) {
-    for (i = 0; i < t.FOR_INIT_KEYS.length; i++) {
-      var node = block[t.FOR_INIT_KEYS[i]];
-      if (t.isBlockScoped(node)) this.registerBinding("let", node);
-    }
-
-    if (t.isBlockStatement(block.body)) {
-      block = block.body;
-    }
-  }
-
-  // FunctionExpression - id
-
-  if (t.isFunctionExpression(block) && block.id) {
-    if (!t.isProperty(this.parentBlock, { method: true })) {
-      this.registerBinding("var", block.id);
-    }
-  }
-
-  // Function - params, rest
-
-  if (t.isFunction(block)) {
-    for (i = 0; i < block.params.length; i++) {
-      this.registerBinding("param", block.params[i]);
-    }
-    this.traverse(block.body, blockVariableVisitor, this);
-  }
-
-  // Program, BlockStatement, Function - let variables
-
-  if (t.isBlockStatement(block) || t.isProgram(block)) {
-    this.traverse(block, blockVariableVisitor, this);
-  }
-
-  // CatchClause - param
-
-  if (t.isCatchClause(block)) {
-    this.registerBinding("let", block.param);
-  }
-
-  // ComprehensionExpression - blocks
-
-  if (t.isComprehensionExpression(block)) {
-    this.registerBinding("let", block);
-  }
-
-  // Program, Function - var variables
-
-  if (t.isProgram(block) || t.isFunction(block)) {
-    this.traverse(block, functionVariableVisitor, {
-      blockId: block.id,
-      scope:   this
-    });
-  }
-
-  // Program
-
-  if (t.isProgram(block)) {
-    this.traverse(block, programReferenceVisitor, this);
-  }
-};
-
-/**
- * Description
- *
- * @param {Object} opts
- */
-
-Scope.prototype.push = function (opts) {
-  var block = this.block;
-
-  if (t.isLoop(block) || t.isCatchClause(block) || t.isFunction(block)) {
-    t.ensureBlock(block);
-    block = block.body;
-  }
-
-  if (t.isBlockStatement(block) || t.isProgram(block)) {
-    block._declarations = block._declarations || {};
-    block._declarations[opts.key] = {
-      kind: opts.kind,
-      id: opts.id,
-      init: opts.init
-    };
-  } else {
-    throw new TypeError("cannot add a declaration here in node type " + block.type);
-  }
-};
-
-/**
- * Walk up the scope tree until we hit either a Function or reach the
- * very top and hit Program.
- */
-
-Scope.prototype.getFunctionParent = function () {
-  var scope = this;
-  while (scope.parent && !t.isFunction(scope.block)) {
-    scope = scope.parent;
-  }
-  return scope;
-};
-
-/**
- * Walks the scope tree and gathers **all** bindings.
- *
- * @returns {Object}
- */
-
-Scope.prototype.getAllBindings = function () {
-  var ids = object();
-
-  var scope = this;
-  do {
-    defaults(ids, scope.bindings);
-    scope = scope.parent;
-  } while (scope);
-
-  return ids;
-};
-
-/**
- * Walks the scope tree and gathers all declarations of `kind`.
- *
- * @param {String} kind
- * @returns {Object}
- */
-
-Scope.prototype.getAllBindingsOfKind = function (kind) {
-  var ids = object();
-
-  var scope = this;
-  do {
-    for (var name in scope.bindings) {
-      var binding = scope.bindings[name];
-      if (binding.kind === kind) ids[name] = binding;
-    }
-    scope = scope.parent;
-  } while (scope);
-
-  return ids;
-};
-
-// misc
-
-Scope.prototype.bindingIdentifierEquals = function (name, node) {
-  return this.getBindingIdentifier(name) === node;
-};
-
-// get
-
-Scope.prototype.getBindingInfo = function (name) {
-  var scope = this;
-
-  do {
-    var binding = scope.getOwnBindingInfo(name);
-    if (binding) return binding;
-  } while (scope = scope.parent);
-};
-
-Scope.prototype.getOwnBindingInfo = function (name) {
-  return this.bindings[name];
-};
-
-Scope.prototype.getBindingIdentifier = function (name) {
-  var info = this.getBindingInfo(name);
-  return info && info.identifier;
-};
-
-Scope.prototype.getOwnBindingIdentifier = function (name) {
-  var binding = this.bindings[name];
-  return binding && binding.identifier;
-};
-
-// has
-
-Scope.prototype.hasOwnBinding = function (name) {
-  return !!this.getOwnBindingInfo(name);
-};
-
-Scope.prototype.hasBinding = function (name) {
-  if (!name) return false;
-  if (this.hasOwnBinding(name)) return true;
-  if (this.parentHasBinding(name)) return true;
-  if (includes(Scope.globals, name)) return true;
-  return false;
-};
-
-Scope.prototype.parentHasBinding = function (name) {
-  return this.parent && this.parent.hasBinding(name);
-};

package.json

@@ -1,7 +1,7 @@
 {
   "name": "babel",
   "description": "Turn ES6 code into readable vanilla ES5 with source maps",
-  "version": "4.2.0",
+  "version": "4.6.0",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
   "repository": "babel/babel",
@@ -12,11 +12,9 @@
   },
   "bin": {
     "6to5": "./bin/deprecated/6to5",
-    "6to5-minify": "./bin/deprecated/6to5-minify",
     "6to5-node": "./bin/deprecated/6to5-node",
     "6to5-runtime": "./bin/deprecated/6to5-runtime",
     "babel": "./bin/babel/index.js",
-    "babel-minify": "./bin/babel-minify",
     "babel-node": "./bin/babel-node",
     "babel-external-helpers": "./bin/babel-external-helpers"
   },
@@ -38,12 +36,12 @@
     "test": "make test"
   },
   "dependencies": {
-    "acorn-babel": "0.11.1-33",
+    "acorn-babel": "0.11.1-35",
     "ast-types": "~0.6.1",
-    "chalk": "^0.5.1",
+    "chalk": "^1.0.0",
     "chokidar": "^0.12.6",
     "commander": "^2.6.0",
-    "core-js": "^0.5.4",
+    "core-js": "^0.6.1",
     "debug": "^2.1.1",
     "detect-indent": "^3.0.0",
     "estraverse": "^1.9.1",
@@ -51,30 +49,31 @@
     "fs-readdir-recursive": "^0.1.0",
     "globals": "^6.2.0",
     "is-integer": "^1.0.4",
-    "js-tokenizer": "^1.3.3",
+    "js-tokens": "1.0.0",
     "leven": "^1.0.1",
+    "line-numbers": "0.2.0",
     "lodash": "^3.2.0",
     "output-file-sync": "^1.1.0",
     "path-is-absolute": "^1.0.0",
     "private": "^0.1.6",
-    "regenerator-babel": "0.8.10-2",
+    "regenerator-babel": "0.8.13-1",
     "regexpu": "^1.1.1",
     "repeating": "^1.1.2",
     "shebang-regex": "^1.0.0",
     "slash": "^1.0.0",
-    "source-map": "^0.1.43",
+    "source-map": "^0.4.0",
     "source-map-support": "^0.2.9",
     "source-map-to-comment": "^1.0.0",
     "trim-right": "^1.0.0"
   },
   "devDependencies": {
-    "browserify": "^8.1.3",
+    "babel": "4.5.1",
+    "browserify": "^9.0.3",
     "chai": "^2.0.0",
+    "eslint": "^0.15.1",
+    "babel-eslint": "^1.0.0",
     "esvalid": "^1.1.0",
     "istanbul": "^0.3.5",
-    "jscs": "^1.11.3",
-    "jshint": "^2.6.0",
-    "jshint-stylish": "^1.0.0",
     "matcha": "^0.6.0",
     "mocha": "^2.1.0",
     "rimraf": "^2.2.8",

packages/babel-runtime/package.json

@@ -1,7 +1,7 @@
 {
   "name": "babel-runtime",
   "description": "babel selfContained runtime",
-  "version": "4.1.1",
+  "version": "4.5.5",
   "repository": "babel/babel",
   "author": "Sebastian McKenzie <sebmck@gmail.com>"
 }

packages/build-runtime.js

@@ -1,7 +1,7 @@
 "use strict";
 
-var buildHelpers = require("../lib/babel/build-helpers");
 var transform    = require("../lib/babel/transformation");
+var buildHelpers = require("../lib/babel/build-helpers");
 var util         = require("../lib/babel/util");
 var fs           = require("fs");
 var t            = require("../lib/babel/types");

src/babel/api/browser.js

@@ -1,20 +1,16 @@
-"use strict";
-
 var transform = module.exports = require("../transformation");
 
 transform.version = require("../../../package").version;
 
 transform.transform = transform;
 
-transform.run = function (code, opts) {
-  opts = opts || {};
+transform.run = function (code, opts = {}) {
   opts.sourceMap = "inline";
   return new Function(transform(code, opts).code)();
 };
 
-transform.load = function (url, callback, opts, hold) {
-  opts = opts || {};
-  opts.filename = opts.filename || url;
+transform.load = function (url, callback, opts = {}, hold) {
+  opts.filename ||= url;
 
   var xhr = global.ActiveXObject ? new global.ActiveXObject("Microsoft.XMLHTTP") : new global.XMLHttpRequest();
   xhr.open("GET", url, true);

src/babel/api/node.js

@@ -0,0 +1,49 @@
+import isFunction from "lodash/lang/isFunction";
+import transform from "../transformation";
+import fs from "fs";
+
+export { default as acorn } from "acorn-babel";
+export { default as _util, canCompile } from "../util";
+export { default as transform } from "../transformation";
+export { default as traverse } from "../traversal";
+export { default as buildExternalHelpers } from "../build-external-helpers";
+export { default as types } from "../types";
+export { version } from "../../../package";
+
+export function register(opts) {
+  var callback = require("./register/node");
+  if (opts != null) callback(opts);
+  return callback;
+}
+
+export function polyfill() {
+  require("../polyfill");
+}
+
+export function transformFile(filename, opts, callback) {
+  if (isFunction(opts)) {
+    callback = opts;
+    opts = {};
+  }
+
+  opts.filename = filename;
+
+  fs.readFile(filename, function (err, code) {
+    if (err) return callback(err);
+
+    var result;
+
+    try {
+      result = transform(code, opts);
+    } catch (err) {
+      return callback(err);
+    }
+
+    callback(null, result);
+  });
+}
+
+export function transformFileSync(filename, opts = {}) {
+  opts.filename = filename;
+  return transform(fs.readFileSync(filename), opts);
+}

src/babel/api/register/browser.js

@@ -0,0 +1,5 @@
+// required to safely use babel/register within a browserify codebase
+
+export default function () {};
+
+import "../../polyfill";

src/babel/api/register/cache.js

@@ -1,24 +1,22 @@
-"use strict";
-
-var path = require("path");
-var os   = require("os");
-var fs   = require("fs");
+import path from "path";
+import os from "os";
+import fs from "fs";
 
 var FILENAME = process.env.BABEL_CACHE_PATH || path.join(os.tmpdir(), "babel.json");
 var data = {};
 
-exports.save = function () {
+export function save() {
   fs.writeFileSync(FILENAME, JSON.stringify(data, null, "  "));
-};
+}
 
-exports.load = function () {
+export function load() {
   if (process.env.BABEL_DISABLE_CACHE) return;
 
-  process.on("exit", exports.save);
+  process.on("exit", save);
 
   var sigint = function () {
     process.removeListener("SIGINT", sigint);
-    exports.save();
+    save();
     process.kill(process.pid, "SIGINT");
   };
 
@@ -31,8 +29,8 @@ exports.load = function () {
   } catch (err) {
     return;
   }
-};
+}
 
-exports.get = function () {
+export function get() {
   return data;
-};
+}

src/babel/api/register/node.js

@@ -1,17 +1,16 @@
-"use strict";
-
-require("../../polyfill");
-
-var sourceMapSupport = require("source-map-support");
-var registerCache    = require("./cache");
-var extend           = require("lodash/object/extend");
-var babel            = require("../node");
-var each             = require("lodash/collection/each");
-var util             = require("../../util");
-var fs               = require("fs");
+import "../../polyfill";
+import sourceMapSupport from "source-map-support";
+import * as registerCache from "./cache";
+import resolveRc from "./resolve-rc";
+import extend from "lodash/object/extend";
+import * as babel from "../node";
+import each from "lodash/collection/each";
+import * as util from  "../../util";
+import fs from "fs";
 
 sourceMapSupport.install({
-  retrieveSourceMap: function (source) {
+  handleUncaughtExceptions: false,
+  retrieveSourceMap(source) {
     var map = maps && maps[source];
     if (map) {
       return {
@@ -34,7 +33,7 @@ var cache = registerCache.get();
 var transformOpts = {};
 var ignoreRegex   = /node_modules/;
 var onlyRegex;
-var exts          = {};
+var oldHandlers   = {};
 var maps          = {};
 
 var mtime = function (filename) {
@@ -44,7 +43,10 @@ var mtime = function (filename) {
 var compile = function (filename) {
   var result;
 
-  var cacheKey = filename + ":" + JSON.stringify(transformOpts);
+  var opts = extend({}, transformOpts);
+  resolveRc(filename, opts);
+
+  var cacheKey = filename + ":" + JSON.stringify(opts);
 
   if (cache) {
     var cached = cache[cacheKey];
@@ -54,10 +56,10 @@ var compile = function (filename) {
   }
 
   if (!result) {
-    result = babel.transformFileSync(filename, extend({
+    result = babel.transformFileSync(filename, extend(opts, {
       sourceMap: true,
       ast:       false
-    }, transformOpts));
+    }));
   }
 
   if (cache) {
@@ -103,7 +105,7 @@ var normalLoader = function (m, filename) {
 };
 
 var registerExtension = function (ext) {
-  var old = require.extensions[ext];
+  var old = oldHandlers[ext] || oldHandlers[".js"];
 
   var loader = normalLoader;
   if (process.env.running_under_istanbul) loader = istanbulLoader; // jshint ignore:line
@@ -118,24 +120,25 @@ var registerExtension = function (ext) {
 };
 
 var hookExtensions = function (_exts) {
-  each(exts, function (old, ext) {
-    require.extensions[ext] = old;
+  each(oldHandlers, function (old, ext) {
+    if (old === undefined) {
+      delete require.extensions[ext];
+    } else {
+      require.extensions[ext] = old;
+    }
   });
 
-  exts = {};
+  oldHandlers = {};
 
   each(_exts, function (ext) {
-    exts[ext] = require.extensions[ext];
+    oldHandlers[ext] = require.extensions[ext];
     registerExtension(ext);
   });
 };
 
 hookExtensions(util.canCompile.EXTENSIONS);
 
-module.exports = function (opts) {
-  // normalize options
-  opts = opts || {};
-
+export default function (opts = {}) {
   if (opts.only != null) onlyRegex = util.regexify(opts.only);
   if (opts.ignore != null) ignoreRegex = util.regexify(opts.ignore);
 

src/babel/api/register/resolve-rc.js

@@ -0,0 +1,47 @@
+import merge from "lodash/object/merge";
+import path from "path";
+import fs from "fs";
+
+var cache = {};
+
+function exists(filename) {
+  var cached = cache[filename];
+  if (cached != null) return cached;
+  return cache[filename] = fs.existsSync(filename);
+}
+
+export default function (loc, opts = {}) {
+  var rel = ".babelrc";
+
+  function find(start, rel) {
+    var file = path.join(start, rel);
+
+    if (exists(file)) {
+      var content = fs.readFileSync(file, "utf8");
+      var json;
+
+      try {
+        json = JSON.parse(content);
+      } catch (err) {
+        err.message = file + ": " + err.message;
+        throw err;
+      }
+
+      if (json.breakConfig) return;
+      merge(opts, json, function(a, b) {
+        if (Array.isArray(a)) {
+          return a.concat(b);
+        }
+      });
+    }
+
+    var up = path.dirname(start);
+    if (up !== start) { // root
+      find(up, rel);
+    }
+  }
+
+  find(loc, rel);
+
+  return opts;
+};

src/babel/build-external-helpers.js

@@ -1,11 +1,9 @@
-"use strict";
+import buildHelpers from "./build-helpers";
+import generator from "./generation";
+import * as util from  "./util";
+import t from "./types";
 
-var buildHelpers = require("./build-helpers");
-var generator    = require("./generation");
-var util         = require("./util");
-var t            = require("./types");
-
-module.exports = function () {
+export default function (whitelist) {
   var namespace = t.identifier("babelHelpers");
 
   var body      = [];
@@ -19,7 +17,7 @@ module.exports = function () {
     )
   ]));
 
-  buildHelpers(body, namespace);
+  buildHelpers(body, namespace, whitelist);
 
   return generator(tree).code;
 };

src/babel/build-helpers.js

@@ -0,0 +1,15 @@
+import File from "./transformation/file";
+import * as util from  "./util";
+import each from "lodash/collection/each";
+import t from "./types";
+
+export default function (body, namespace, whitelist = []) {
+  each(File.helpers, function (name) {
+    if (whitelist.length && whitelist.indexOf(name) === -1) return;
+
+    var key = t.identifier(t.toIdentifier(name));
+    body.push(t.expressionStatement(
+      t.assignmentExpression("=", t.memberExpression(namespace, key), util.template(name))
+    ));
+  });
+};

src/babel/detection/index.js

@@ -1,10 +1,9 @@
-module.exports = detect;
+import SYNTAX_KEYS from "./syntax-keys";
+import traverse from "../traversal";
 
-var SYNTAX_KEYS = require("./syntax-keys");
-var traverse    = require("../traversal");
-var visitors    = traverse.explode(require("./visitors"));
+var visitors  = traverse.explode(require("./visitors"));
 
-function detect(ast) {
+export default function (ast) {
   var stats = {
     syntax: {},
     builtins: {}
@@ -15,7 +14,7 @@ function detect(ast) {
   };
 
   traverse(ast, {
-    enter: function (node, parent) {
+    enter(node, parent) {
       if (SYNTAX_KEYS[node.type]) {
         detectedSyntax(SYNTAX_KEYS[node.type]);
       }
@@ -26,4 +25,4 @@ function detect(ast) {
   });
 
   return stats;
-}
+};

src/babel/detection/visitors.js

@@ -1,19 +1,19 @@
-var t = require("../types");
-var includes = require("lodash/collection/includes");
+import includes from "lodash/collection/includes";
+import t from "../types";
 
-exports.AssignmentExpression = function (node, parent, detected) {
+export function AssignmentExpression(node, parent, detected) {
   if (node.operator === "**=") {
     detected("es6.exponentation");
   }
-};
+}
 
-exports.BinaryExpression = function (node, parent, detected) {
+export function BinaryExpression(node, parent, detected) {
   if (node.operator === "**") {
     detected("es6.exponentation");
   }
-};
+}
 
-exports.VariableDeclaration = function (node, parent, detected) {
+export function VariableDeclaration(node, parent, detected) {
   if (node.kind === "let" || node.kind === "const") {
     detected("es6.blockScoping");
   }
@@ -21,9 +21,9 @@ exports.VariableDeclaration = function (node, parent, detected) {
   if (node.kind === "const") {
     detected("es6.constants");
   }
-};
+}
 
-exports.Property = function (node, parent, detected) {
+export function Property(node, parent, detected) {
   if (node.shorthand || node.method) {
     detected("es6.properties.shorthand");
   }
@@ -35,13 +35,13 @@ exports.Property = function (node, parent, detected) {
   if (node.computed) {
     detected("es6.properties.computed");
   }
-};
+}
 
-exports.AssignmentPattern = function (node, parent, detected) {
+export function AssignmentPattern(node, parent, detected) {
   if (t.isFunction(parent) && includes(parent.params, node)) {
     detected("es6.parameters.default");
   }
-};
+}
 
 exports.Function = function (node, parent, detected) {
   if (node.generator) {

src/babel/generation/buffer.js

@@ -0,0 +1,173 @@
+import repeating from "repeating";
+import trimRight from "trim-right";
+import isBoolean from "lodash/lang/isBoolean";
+import includes from "lodash/collection/includes";
+import isNumber from "lodash/lang/isNumber";
+
+export default class Buffer {
+  constructor(position, format) {
+    this.position = position;
+    this._indent  = format.indent.base;
+    this.format   = format;
+    this.buf      = "";
+  }
+
+  get() {
+    return trimRight(this.buf);
+  }
+
+  getIndent() {
+    if (this.format.compact || this.format.concise) {
+      return "";
+    } else {
+      return repeating(this.format.indent.style, this._indent);
+    }
+  }
+
+  indentSize() {
+    return this.getIndent().length;
+  }
+
+  indent() {
+    this._indent++;
+  }
+
+  dedent() {
+    this._indent--;
+  }
+
+  semicolon() {
+    this.push(";");
+  }
+
+  ensureSemicolon() {
+    if (!this.isLast(";")) this.semicolon();
+  }
+
+  rightBrace() {
+    this.newline(true);
+    this.push("}");
+  }
+
+  keyword(name) {
+    this.push(name);
+    this.space();
+  }
+
+  space() {
+    if (this.format.compact) return;
+    if (this.buf && !this.isLast(" ") && !this.isLast("\n")) {
+      this.push(" ");
+    }
+  }
+
+  removeLast(cha) {
+    if (this.format.compact) return;
+    if (!this.isLast(cha)) return;
+
+    this.buf = this.buf.substr(0, this.buf.length - 1);
+    this.position.unshift(cha);
+  }
+
+  newline(i, removeLast) {
+    if (this.format.compact) return;
+
+    if (this.format.concise) {
+      this.space();
+      return;
+    }
+
+    removeLast ||= false;
+
+    if (isNumber(i)) {
+      i = Math.min(2, i);
+
+      if (this.endsWith("{\n") || this.endsWith(":\n")) i--;
+      if (i <= 0) return;
+
+      while (i > 0) {
+        this._newline(removeLast);
+        i--;
+      }
+      return;
+    }
+
+    if (isBoolean(i)) {
+      removeLast = i;
+    }
+
+    this._newline(removeLast);
+  }
+
+  _newline(removeLast) {
+    // never allow more than two lines
+    if (this.endsWith("\n\n")) return;
+
+    // remove the last newline
+    if (removeLast && this.isLast("\n")) this.removeLast("\n");
+
+    this.removeLast(" ");
+    this._removeSpacesAfterLastNewline();
+    this._push("\n");
+  }
+
+  /**
+   * If buffer ends with a newline and some spaces after it, trim those spaces.
+   */
+
+  _removeSpacesAfterLastNewline() {
+    var lastNewlineIndex = this.buf.lastIndexOf("\n");
+    if (lastNewlineIndex === -1)
+      return;
+
+    var index = this.buf.length - 1;
+    while (index > lastNewlineIndex) {
+      if (this.buf[index] !== " ") {
+        break;
+      }
+
+      index--;
+    }
+
+    if (index === lastNewlineIndex) {
+      this.buf = this.buf.substring(0, index + 1);
+    }
+  }
+
+  push(str, noIndent) {
+    if (!this.format.compact && this._indent && !noIndent && str !== "\n") {
+      // we have an indent level and we aren't pushing a newline
+      var indent = this.getIndent();
+
+      // replace all newlines with newlines with the indentation
+      str = str.replace(/\n/g, "\n" + indent);
+
+      // we've got a newline before us so prepend on the indentation
+      if (this.isLast("\n")) this._push(indent);
+    }
+
+    this._push(str);
+  }
+
+  _push(str) {
+    this.position.push(str);
+    this.buf += str;
+  }
+
+  endsWith(str) {
+    return this.buf.slice(-str.length) === str;
+  }
+
+  isLast(cha) {
+    if (this.format.compact) return false;
+
+    var buf = this.buf;
+    var last = buf[buf.length - 1];
+
+    if (Array.isArray(cha)) {
+      return includes(cha, last);
+    } else {
+      return cha === last;
+    }
+  }
+}

src/babel/generation/generators/base.js

@@ -1,14 +1,12 @@
-"use strict";
-
-exports.File = function (node, print) {
+export function File(node, print) {
   print(node.program);
-};
+}
 
-exports.Program = function (node, print) {
+export function Program(node, print) {
   print.sequence(node.body);
-};
+}
 
-exports.BlockStatement = function (node, print) {
+export function BlockStatement(node, print) {
   if (node.body.length === 0) {
     this.push("{}");
   } else {
@@ -18,4 +16,4 @@ exports.BlockStatement = function (node, print) {
     this.removeLast("\n");
     this.rightBrace();
   }
-};
+}

src/babel/generation/generators/classes.js

@@ -1,5 +1,3 @@
-"use strict";
-
 exports.ClassExpression =
 exports.ClassDeclaration = function (node, print) {
   this.push("class");
@@ -18,7 +16,7 @@ exports.ClassDeclaration = function (node, print) {
   print(node.body);
 };
 
-exports.ClassBody = function (node, print) {
+export function ClassBody(node, print) {
   if (node.body.length === 0) {
     this.push("{}");
   } else {
@@ -31,12 +29,12 @@ exports.ClassBody = function (node, print) {
 
     this.rightBrace();
   }
-};
+}
 
-exports.MethodDefinition = function (node, print) {
+export function MethodDefinition(node, print) {
   if (node.static) {
     this.push("static ");
   }
 
   this._method(node, print);
-};
+}

src/babel/generation/generators/comprehensions.js

@@ -1,15 +1,13 @@
-"use strict";
-
-exports.ComprehensionBlock = function (node, print) {
+export function ComprehensionBlock(node, print) {
   this.keyword("for");
   this.push("(");
   print(node.left);
   this.push(" of ");
   print(node.right);
   this.push(")");
-};
+}
 
-exports.ComprehensionExpression = function (node, print) {
+export function ComprehensionExpression(node, print) {
   this.push(node.generator ? "(" : "[");
 
   print.join(node.blocks, { separator: " " });
@@ -26,4 +24,4 @@ exports.ComprehensionExpression = function (node, print) {
   print(node.body);
 
   this.push(node.generator ? ")" : "]");
-};
+}

src/babel/generation/generators/expressions.js

@@ -1,10 +1,8 @@
-"use strict";
+import isInteger from "is-integer";
+import isNumber from "lodash/lang/isNumber";
+import t from "../../types";
 
-var isInteger = require("is-integer");
-var isNumber  = require("lodash/lang/isNumber");
-var t         = require("../../types");
-
-exports.UnaryExpression = function (node, print) {
+export function UnaryExpression(node, print) {
   var hasSpace = /[a-z]$/.test(node.operator);
   var arg = node.argument;
 
@@ -19,9 +17,9 @@ exports.UnaryExpression = function (node, print) {
   this.push(node.operator);
   if (hasSpace) this.push(" ");
   print(node.argument);
-};
+}
 
-exports.UpdateExpression = function (node, print) {
+export function UpdateExpression(node, print) {
   if (node.prefix) {
     this.push(node.operator);
     print(node.argument);
@@ -29,9 +27,9 @@ exports.UpdateExpression = function (node, print) {
     print(node.argument);
     this.push(node.operator);
   }
-};
+}
 
-exports.ConditionalExpression = function (node, print) {
+export function ConditionalExpression(node, print) {
   print(node.test);
   this.space();
   this.push("?");
@@ -41,27 +39,25 @@ exports.ConditionalExpression = function (node, print) {
   this.push(":");
   this.space();
   print(node.alternate);
-};
+}
 
-exports.NewExpression = function (node, print) {
+export function NewExpression(node, print) {
   this.push("new ");
   print(node.callee);
-  if (node.arguments.length || this.format.parentheses) {
-    this.push("(");
-    print.list(node.arguments);
-    this.push(")");
-  }
-};
+  this.push("(");
+  print.list(node.arguments);
+  this.push(")");
+}
 
-exports.SequenceExpression = function (node, print) {
+export function SequenceExpression(node, print) {
   print.list(node.expressions);
-};
+}
 
-exports.ThisExpression = function () {
+export function ThisExpression() {
   this.push("this");
-};
+}
 
-exports.CallExpression = function (node, print) {
+export function CallExpression(node, print) {
   print(node.callee);
 
   this.push("(");
@@ -84,7 +80,7 @@ exports.CallExpression = function (node, print) {
   }
 
   this.push(")");
-};
+}
 
 var buildYieldAwait = function (keyword) {
   return function (node, print) {
@@ -101,17 +97,17 @@ var buildYieldAwait = function (keyword) {
   };
 };
 
-exports.YieldExpression = buildYieldAwait("yield");
-exports.AwaitExpression = buildYieldAwait("await");
+export var YieldExpression = buildYieldAwait("yield");
+export var AwaitExpression = buildYieldAwait("await");
 
-exports.EmptyStatement = function () {
+export function EmptyStatement() {
   this.semicolon();
-};
+}
 
-exports.ExpressionStatement = function (node, print) {
+export function ExpressionStatement(node, print) {
   print(node.expression);
   this.semicolon();
-};
+}
 
 exports.BinaryExpression =
 exports.LogicalExpression =
@@ -127,7 +123,7 @@ exports.AssignmentExpression = function (node, print) {
 
 var SCIENTIFIC_NOTATION = /e/i;
 
-exports.MemberExpression = function (node, print) {
+export function MemberExpression(node, print) {
   var obj = node.object;
   print(obj);
 
@@ -153,4 +149,4 @@ exports.MemberExpression = function (node, print) {
     this.push(".");
     print(node.property);
   }
-};
+}

src/babel/generation/generators/flow.js

@@ -1,5 +1,3 @@
-"use strict";
-
 exports.AnyTypeAnnotation =
 exports.ArrayTypeAnnotation =
 exports.BooleanTypeAnnotation =

src/babel/generation/generators/jsx.js

@@ -1,55 +1,51 @@
-"use strict";
+import each from "lodash/collection/each";
+import t from "../../types";
 
-var t    = require("../../types");
-var each = require("lodash/collection/each");
-
-exports.JSXAttribute = function (node, print) {
+export function JSXAttribute(node, print) {
   print(node.name);
   if (node.value) {
     this.push("=");
     print(node.value);
   }
-};
+}
 
-exports.JSXIdentifier = function (node) {
+export function JSXIdentifier(node) {
   this.push(node.name);
-};
+}
 
-exports.JSXNamespacedName = function (node, print) {
+export function JSXNamespacedName(node, print) {
   print(node.namespace);
   this.push(":");
   print(node.name);
-};
+}
 
-exports.JSXMemberExpression = function (node, print) {
+export function JSXMemberExpression(node, print) {
   print(node.object);
   this.push(".");
   print(node.property);
-};
+}
 
-exports.JSXSpreadAttribute = function (node, print) {
+export function JSXSpreadAttribute(node, print) {
   this.push("{...");
   print(node.argument);
   this.push("}");
-};
+}
 
-exports.JSXExpressionContainer = function (node, print) {
+export function JSXExpressionContainer(node, print) {
   this.push("{");
   print(node.expression);
   this.push("}");
-};
-
-exports.JSXElement = function (node, print) {
-  var self = this;
+}
 
+export function JSXElement(node, print) {
   var open = node.openingElement;
   print(open);
   if (open.selfClosing) return;
 
   this.indent();
-  each(node.children, function (child) {
+  each(node.children, (child) => {
     if (t.isLiteral(child)) {
-      self.push(child.value);
+      this.push(child.value);
     } else {
       print(child);
     }
@@ -57,9 +53,9 @@ exports.JSXElement = function (node, print) {
   this.dedent();
 
   print(node.closingElement);
-};
+}
 
-exports.JSXOpeningElement = function (node, print) {
+export function JSXOpeningElement(node, print) {
   this.push("<");
   print(node.name);
   if (node.attributes.length > 0) {
@@ -67,12 +63,12 @@ exports.JSXOpeningElement = function (node, print) {
     print.join(node.attributes, { separator: " " });
   }
   this.push(node.selfClosing ? " />" : ">");
-};
+}
 
-exports.JSXClosingElement = function (node, print) {
+export function JSXClosingElement(node, print) {
   this.push("</");
   print(node.name);
   this.push(">");
-};
+}
 
-exports.JSXEmptyExpression = function () {};
+export function JSXEmptyExpression() {}

src/babel/generation/generators/methods.js

@@ -1,14 +1,12 @@
-"use strict";
+import t from "../../types";
 
-var t = require("../../types");
-
-exports._params = function (node, print) {
+export function _params(node, print) {
   this.push("(");
   print.list(node.params);
   this.push(")");
-};
+}
 
-exports._method = function (node, print) {
+export function _method(node, print) {
   var value = node.value;
   var kind  = node.kind;
   var key   = node.key;
@@ -34,7 +32,7 @@ exports._method = function (node, print) {
   this._params(value, print);
   this.push(" ");
   print(value.body);
-};
+}
 
 exports.FunctionDeclaration =
 exports.FunctionExpression = function (node, print) {
@@ -54,7 +52,7 @@ exports.FunctionExpression = function (node, print) {
   print(node.body);
 };
 
-exports.ArrowFunctionExpression = function (node, print) {
+export function ArrowFunctionExpression(node, print) {
   if (node.async) this.push("async ");
 
   if (node.params.length === 1 && t.isIdentifier(node.params[0])) {
@@ -65,4 +63,4 @@ exports.ArrowFunctionExpression = function (node, print) {
 
   this.push(" => ");
   print(node.body);
-};
+}

src/babel/generation/generators/modules.js

@@ -1,29 +1,27 @@
-"use strict";
+import each from "lodash/collection/each";
+import t from "../../types";
 
-var t    = require("../../types");
-var each = require("lodash/collection/each");
-
-exports.ImportSpecifier = function (node, print) {
+export function ImportSpecifier(node, print) {
   if (t.isSpecifierDefault(node)) {
     print(t.getSpecifierName(node));
   } else {
     return exports.ExportSpecifier.apply(this, arguments);
   }
-};
+}
 
-exports.ExportSpecifier = function (node, print) {
+export function ExportSpecifier(node, print) {
   print(node.id);
   if (node.name) {
     this.push(" as ");
     print(node.name);
   }
-};
+}
 
-exports.ExportBatchSpecifier = function () {
+export function ExportBatchSpecifier() {
   this.push("*");
-};
+}
 
-exports.ExportDeclaration = function (node, print) {
+export function ExportDeclaration(node, print) {
   this.push("export ");
 
   var specifiers = node.specifiers;
@@ -55,27 +53,29 @@ exports.ExportDeclaration = function (node, print) {
   }
 
   this.ensureSemicolon();
-};
-
-exports.ImportDeclaration = function (node, print) {
-  var self = this;
+}
 
+export function ImportDeclaration(node, print) {
   this.push("import ");
 
+  if (node.isType) {
+    this.push("type ");
+  }
+
   var specfiers = node.specifiers;
   if (specfiers && specfiers.length) {
     var foundImportSpecifier = false;
 
-    each(node.specifiers, function (spec, i) {
+    each(node.specifiers, (spec, i) => {
       if (+i > 0) {
-        self.push(", ");
+        this.push(", ");
       }
 
       var isDefault = t.isSpecifierDefault(spec);
 
       if (!isDefault && spec.type !== "ImportBatchSpecifier" && !foundImportSpecifier) {
         foundImportSpecifier = true;
-        self.push("{ ");
+        this.push("{ ");
       }
 
       print(spec);
@@ -90,9 +90,9 @@ exports.ImportDeclaration = function (node, print) {
 
   print(node.source);
   this.semicolon();
-};
+}
 
-exports.ImportBatchSpecifier = function (node, print) {
+export function ImportBatchSpecifier(node, print) {
   this.push("* as ");
   print(node.name);
-};
+}

src/babel/generation/generators/playground.js

@@ -1,6 +1,4 @@
-"use strict";
-
-var each = require("lodash/collection/each");
+import each from "lodash/collection/each";
 
 each(["BindMemberExpression", "BindFunctionExpression"], function (type) {
   exports[type] = function () {

src/babel/generation/generators/statements.js

@@ -1,17 +1,15 @@
-"use strict";
+import repeating from "repeating";
+import t from "../../types";
 
-var repeating = require("repeating");
-var t         = require("../../types");
-
-exports.WithStatement = function (node, print) {
+export function WithStatement(node, print) {
   this.keyword("with");
   this.push("(");
   print(node.object);
   this.push(")");
   print.block(node.body);
-};
+}
 
-exports.IfStatement = function (node, print) {
+export function IfStatement(node, print) {
   this.keyword("if");
   this.push("(");
   print(node.test);
@@ -22,17 +20,12 @@ exports.IfStatement = function (node, print) {
 
   if (node.alternate) {
     if (this.isLast("}")) this.space();
-    this.keyword("else");
-
-    if (this.format.format && !t.isBlockStatement(node.alternate)) {
-      this.push(" ");
-    }
-
+    this.push("else ");
     print.indentOnComments(node.alternate);
   }
-};
+}
 
-exports.ForStatement = function (node, print) {
+export function ForStatement(node, print) {
   this.keyword("for");
   this.push("(");
 
@@ -52,15 +45,15 @@ exports.ForStatement = function (node, print) {
 
   this.push(")");
   print.block(node.body);
-};
+}
 
-exports.WhileStatement = function (node, print) {
+export function WhileStatement(node, print) {
   this.keyword("while");
   this.push("(");
   print(node.test);
   this.push(")");
   print.block(node.body);
-};
+}
 
 var buildForXStatement = function (op) {
   return function (node, print) {
@@ -74,10 +67,10 @@ var buildForXStatement = function (op) {
   };
 };
 
-exports.ForInStatement = buildForXStatement("in");
-exports.ForOfStatement = buildForXStatement("of");
+export var ForInStatement = buildForXStatement("in");
+export var ForOfStatement = buildForXStatement("of");
 
-exports.DoWhileStatement = function (node, print) {
+export function DoWhileStatement(node, print) {
   this.keyword("do");
   print(node.body);
   this.space();
@@ -85,7 +78,7 @@ exports.DoWhileStatement = function (node, print) {
   this.push("(");
   print(node.test);
   this.push(");");
-};
+}
 
 var buildLabelStatement = function (prefix, key) {
   return function (node, print) {
@@ -101,17 +94,17 @@ var buildLabelStatement = function (prefix, key) {
   };
 };
 
-exports.ContinueStatement = buildLabelStatement("continue");
-exports.ReturnStatement   = buildLabelStatement("return", "argument");
-exports.BreakStatement    = buildLabelStatement("break");
+export var ContinueStatement = buildLabelStatement("continue");
+export var ReturnStatement   = buildLabelStatement("return", "argument");
+export var BreakStatement    = buildLabelStatement("break");
 
-exports.LabeledStatement = function (node, print) {
+export function LabeledStatement(node, print) {
   print(node.label);
   this.push(": ");
   print(node.body);
-};
+}
 
-exports.TryStatement = function (node, print) {
+export function TryStatement(node, print) {
   this.keyword("try");
   print(node.block);
   this.space();
@@ -130,34 +123,41 @@ exports.TryStatement = function (node, print) {
     this.push("finally ");
     print(node.finalizer);
   }
-};
+}
 
-exports.CatchClause = function (node, print) {
+export function CatchClause(node, print) {
   this.keyword("catch");
   this.push("(");
   print(node.param);
   this.push(") ");
   print(node.body);
-};
+}
 
-exports.ThrowStatement = function (node, print) {
+export function ThrowStatement(node, print) {
   this.push("throw ");
   print(node.argument);
   this.semicolon();
-};
+}
 
-exports.SwitchStatement = function (node, print) {
+export function SwitchStatement(node, print) {
   this.keyword("switch");
   this.push("(");
   print(node.discriminant);
   this.push(")");
   this.space();
   this.push("{");
-  print.sequence(node.cases, { indent: true });
-  this.push("}");
-};
 
-exports.SwitchCase = function (node, print) {
+  print.sequence(node.cases, {
+    indent: true,
+    addNewlines(leading, cas) {
+      if (!leading && node.cases[node.cases.length - 1] === cas) return -1;
+    }
+  });
+
+  this.push("}");
+}
+
+export function SwitchCase(node, print) {
   if (node.test) {
     this.push("case ");
     print(node.test);
@@ -166,15 +166,17 @@ exports.SwitchCase = function (node, print) {
     this.push("default:");
   }
 
-  this.newline();
-  print.sequence(node.consequent, { indent: true });
-};
+  if (node.consequent.length) {
+    this.newline();
+    print.sequence(node.consequent, { indent: true });
+  }
+}
 
-exports.DebuggerStatement = function () {
+export function DebuggerStatement() {
   this.push("debugger;");
-};
+}
 
-exports.VariableDeclaration = function (node, print, parent) {
+export function VariableDeclaration(node, print, parent) {
   this.push(node.kind + " ");
 
   var hasInits = false;
@@ -189,7 +191,7 @@ exports.VariableDeclaration = function (node, print, parent) {
   }
 
   var sep = ",";
-  if (hasInits) {
+  if (!this.format.compact && hasInits) {
     sep += "\n" + repeating(" ", node.kind.length + 1);
   } else {
     sep += " ";
@@ -200,15 +202,15 @@ exports.VariableDeclaration = function (node, print, parent) {
   if (!t.isFor(parent)) {
     this.semicolon();
   }
-};
+}
 
-exports.PrivateDeclaration = function (node, print) {
+export function PrivateDeclaration(node, print) {
   this.push("private ");
   print.join(node.declarations, { separator: ", " });
   this.semicolon();
-};
+}
 
-exports.VariableDeclarator = function (node, print) {
+export function VariableDeclarator(node, print) {
   if (node.init) {
     print(node.id);
     this.space();
@@ -218,4 +220,4 @@ exports.VariableDeclarator = function (node, print) {
   } else {
     print(node.id);
   }
-};
+}

src/babel/generation/generators/template-literals.js

@@ -0,0 +1,29 @@
+import each from "lodash/collection/each";
+
+export function TaggedTemplateExpression(node, print) {
+  print(node.tag);
+  print(node.quasi);
+}
+
+export function TemplateElement(node) {
+  this._push(node.value.raw);
+}
+
+export function TemplateLiteral(node, print) {
+  this.push("`");
+
+  var quasis = node.quasis;
+  var len    = quasis.length;
+
+  each(quasis, (quasi, i) => {
+    print(quasi);
+
+    if (i + 1 < len) {
+      this.push("${ ");
+      print(node.expressions[i]);
+      this.push(" }");
+    }
+  });
+
+  this._push("`");
+}

src/babel/generation/generators/types.js

@@ -1,10 +1,8 @@
-"use strict";
+import each from "lodash/collection/each";
 
-var each = require("lodash/collection/each");
-
-exports.Identifier = function (node) {
+export function Identifier(node) {
   this.push(node.name);
-};
+}
 
 exports.RestElement =
 exports.SpreadElement =
@@ -13,11 +11,11 @@ exports.SpreadProperty = function (node, print) {
   print(node.argument);
 };
 
-exports.VirtualPropertyExpression = function (node, print) {
+export function VirtualPropertyExpression(node, print) {
   print(node.object);
   this.push("::");
   print(node.property);
-};
+}
 
 exports.ObjectExpression =
 exports.ObjectPattern = function (node, print) {
@@ -36,7 +34,7 @@ exports.ObjectPattern = function (node, print) {
   }
 };
 
-exports.Property = function (node, print) {
+export function Property(node, print) {
   if (node.method || node.kind === "get" || node.kind === "set") {
     this._method(node, print);
   } else {
@@ -53,35 +51,34 @@ exports.Property = function (node, print) {
     this.space();
     print(node.value);
   }
-};
+}
 
 exports.ArrayExpression =
 exports.ArrayPattern = function (node, print) {
   var elems = node.elements;
-  var self  = this;
   var len   = elems.length;
 
   this.push("[");
 
-  each(elems, function (elem, i) {
+  each(elems, (elem, i) => {
     if (!elem) {
       // If the array expression ends with a hole, that hole
       // will be ignored by the interpreter, but if it ends with
       // two (or more) holes, we need to write out two (or more)
       // commas so that the resulting code is interpreted with
       // both (all) of the holes.
-      self.push(",");
+      this.push(",");
     } else {
-      if (i > 0 && !self.format.compact) self.push(" ");
+      if (i > 0) this.push(" ");
       print(elem);
-      if (i < len - 1) self.push(",");
+      if (i < len - 1) this.push(",");
     }
   });
 
   this.push("]");
 };
 
-exports.Literal = function (node) {
+export function Literal(node) {
   var val  = node.value;
   var type = typeof val;
 
@@ -103,4 +100,4 @@ exports.Literal = function (node) {
   } else if (val === null) {
     this.push("null");
   }
-};
+}

src/babel/generation/index.js

@@ -0,0 +1,354 @@
+import detectIndent from "detect-indent";
+import Whitespace from "./whitespace";
+import repeating from "repeating";
+import SourceMap from "./source-map";
+import Position from "./position";
+import * as messages from "../messages";
+import Buffer from "./buffer";
+import extend from "lodash/object/extend";
+import each from "lodash/collection/each";
+import n from "./node";
+import t from "../types";
+
+class CodeGenerator {
+  constructor(ast, opts, code) {
+    opts ||= {};
+
+    this.comments = ast.comments || [];
+    this.tokens   = ast.tokens || [];
+    this.format   = CodeGenerator.normalizeOptions(code, opts);
+    this.opts     = opts;
+    this.ast      = ast;
+
+    this.whitespace = new Whitespace(this.tokens, this.comments, this.format);
+    this.position   = new Position;
+    this.map        = new SourceMap(this.position, opts, code);
+    this.buffer     = new Buffer(this.position, this.format);
+  }
+
+  static normalizeOptions(code, opts) {
+    var style = "  ";
+    if (code) {
+      var indent = detectIndent(code).indent;
+      if (indent && indent !== " ") style = indent;
+    }
+
+    var format = {
+      comments: opts.comments == null || opts.comments,
+      compact: opts.compact,
+      indent: {
+        adjustMultilineComment: true,
+        style: style,
+        base: 0
+      }
+    };
+
+    if (format.compact === "auto") {
+      format.compact = code.length > 100000; // 100KB
+
+      if (format.compact) {
+        console.error(messages.get("codeGeneratorDeopt", opts.filename, "100KB"));
+      }
+    }
+
+    return format;
+  }
+
+  static generators = {
+    templateLiterals: require("./generators/template-literals"),
+    comprehensions:   require("./generators/comprehensions"),
+    expressions:      require("./generators/expressions"),
+    statements:       require("./generators/statements"),
+    playground:       require("./generators/playground"),
+    classes:          require("./generators/classes"),
+    methods:          require("./generators/methods"),
+    modules:          require("./generators/modules"),
+    types:            require("./generators/types"),
+    flow:             require("./generators/flow"),
+    base:             require("./generators/base"),
+    jsx:              require("./generators/jsx")
+  };
+
+  generate() {
+    var ast = this.ast;
+
+    this.print(ast);
+
+    var comments = [];
+    each(ast.comments, function (comment) {
+      if (!comment._displayed) comments.push(comment);
+    });
+    this._printComments(comments);
+
+    return {
+      map:  this.map.get(),
+      code: this.buffer.get()
+    };
+  }
+
+  buildPrint(parent) {
+    var print = (node, opts) => {
+      return this.print(node, parent, opts);
+    };
+
+    print.sequence = (nodes, opts = {}) => {
+      opts.statement = true;
+      return this.printJoin(print, nodes, opts);
+    };
+
+    print.join = (nodes, opts) => {
+      return this.printJoin(print, nodes, opts);
+    };
+
+    print.list = function (items, opts = {}) {
+      opts.separator ||= ", ";
+      print.join(items, opts);
+    };
+
+    print.block = (node) => {
+      return this.printBlock(print, node);
+    };
+
+    print.indentOnComments = (node) => {
+      return this.printAndIndentOnComments(print, node);
+    };
+
+    return print;
+  }
+
+  print(node, parent, opts = {}) {
+    if (!node) return "";
+
+    if (parent && parent._compact) {
+      node._compact = true;
+    }
+
+    var oldConcise = this.format.concise;
+    if (node._compact) {
+      this.format.concise = true;
+    }
+
+    var newline = (leading) => {
+      if (!opts.statement && !n.isUserWhitespacable(node, parent)) {
+        return;
+      }
+
+      var lines = 0;
+
+      if (node.start != null && !node._ignoreUserWhitespace) {
+        // user node
+        if (leading) {
+          lines = this.whitespace.getNewlinesBefore(node);
+        } else {
+          lines = this.whitespace.getNewlinesAfter(node);
+        }
+      } else {
+        // generated node
+        if (!leading) lines++; // always include at least a single line after
+        if (opts.addNewlines) lines += opts.addNewlines(leading, node) || 0;
+
+        var needs = n.needsWhitespaceAfter;
+        if (leading) needs = n.needsWhitespaceBefore;
+        if (needs(node, parent)) lines++;
+
+        // generated nodes can't add starting file whitespace
+        if (!this.buffer.buf) lines = 0;
+      }
+
+      this.newline(lines);
+    };
+
+    if (this[node.type]) {
+      var needsNoLineTermParens = n.needsParensNoLineTerminator(node, parent);
+      var needsParens           = needsNoLineTermParens || n.needsParens(node, parent);
+
+      if (needsParens) this.push("(");
+      if (needsNoLineTermParens) this.indent();
+
+      this.printLeadingComments(node, parent);
+
+      newline(true);
+
+      if (opts.before) opts.before();
+      this.map.mark(node, "start");
+
+      this[node.type](node, this.buildPrint(node), parent);
+
+      if (needsNoLineTermParens) {
+        this.newline();
+        this.dedent();
+      }
+      if (needsParens) this.push(")");
+
+      this.map.mark(node, "end");
+      if (opts.after) opts.after();
+
+      newline(false);
+
+      this.printTrailingComments(node, parent);
+    } else {
+      throw new ReferenceError("unknown node of type " + JSON.stringify(node.type) + " with constructor " + JSON.stringify(node && node.constructor.name));
+    }
+
+    this.format.concise = oldConcise;
+  }
+
+  printJoin(print, nodes, opts = {}) {
+    if (!nodes || !nodes.length) return;
+
+    var len = nodes.length;
+
+    if (opts.indent) this.indent();
+
+    each(nodes, (node, i) => {
+      print(node, {
+        statement: opts.statement,
+        addNewlines: opts.addNewlines,
+        after: () => {
+          if (opts.iterator) {
+            opts.iterator(node, i);
+          }
+
+          if (opts.separator && i < len - 1) {
+            this.push(opts.separator);
+          }
+        }
+      });
+    });
+
+    if (opts.indent) this.dedent();
+  }
+
+  printAndIndentOnComments(print, node) {
+    var indent = !!node.leadingComments;
+    if (indent) this.indent();
+    print(node);
+    if (indent) this.dedent();
+  }
+
+  printBlock(print, node) {
+    if (t.isEmptyStatement(node)) {
+      this.semicolon();
+    } else {
+      this.push(" ");
+      print(node);
+    }
+  }
+
+  generateComment(comment) {
+    var val = comment.value;
+    if (comment.type === "Line") {
+      val = "//" + val;
+    } else {
+      val = "/*" + val + "*/";
+    }
+    return val;
+  }
+
+  printTrailingComments(node, parent) {
+    this._printComments(this.getComments("trailingComments", node, parent));
+  }
+
+  printLeadingComments(node, parent) {
+    this._printComments(this.getComments("leadingComments", node, parent));
+  }
+
+  getComments(key, node, parent) {
+    if (t.isExpressionStatement(parent)) {
+      return [];
+    }
+
+    var comments = [];
+    var nodes    = [node];
+
+    if (t.isExpressionStatement(node)) {
+      nodes.push(node.argument);
+    }
+
+    each(nodes, (node) => {
+      comments = comments.concat(this._getComments(key, node));
+    });
+
+    return comments;
+  }
+
+  _getComments(key, node) {
+    return (node && node[key]) || [];
+  }
+
+  _printComments(comments) {
+    if (this.format.compact) return;
+
+    if (!this.format.comments) return;
+    if (!comments || !comments.length) return;
+
+    each(comments, (comment) => {
+      var skip = false;
+
+      // find the original comment in the ast and set it as displayed
+      each(this.ast.comments, function (origComment) {
+        if (origComment.start === comment.start) {
+          // comment has already been output
+          if (origComment._displayed) skip = true;
+
+          origComment._displayed = true;
+          return false;
+        }
+      });
+
+      if (skip) return;
+
+      // whitespace before
+      this.newline(this.whitespace.getNewlinesBefore(comment));
+
+      var column = this.position.column;
+      var val    = this.generateComment(comment);
+
+      if (column && !this.isLast(["\n", " ", "[", "{"])) {
+        this._push(" ");
+        column++;
+      }
+
+      //
+
+      if (comment.type === "Block" && this.format.indent.adjustMultilineComment) {
+        var offset = comment.loc.start.column;
+        if (offset) {
+          var newlineRegex = new RegExp("\\n\\s{1," + offset + "}", "g");
+          val = val.replace(newlineRegex, "\n");
+        }
+
+        var indent = Math.max(this.indentSize(), column);
+        val = val.replace(/\n/g, "\n" + repeating(" ", indent));
+      }
+
+      if (column === 0) {
+        val = this.getIndent() + val;
+      }
+
+      //
+
+      this._push(val);
+
+      // whitespace after
+      this.newline(this.whitespace.getNewlinesAfter(comment));
+    });
+  }
+}
+
+each(Buffer.prototype, function (fn, key) {
+  CodeGenerator.prototype[key] = function () {
+    return fn.apply(this.buffer, arguments);
+  };
+});
+
+each(CodeGenerator.generators, function (generator) {
+  extend(CodeGenerator.prototype, generator);
+});
+
+module.exports = function (ast, opts, code) {
+  var gen = new CodeGenerator(ast, opts, code);
+  return gen.generate();
+};
+
+module.exports.CodeGenerator = CodeGenerator;

src/babel/generation/node/index.js

@@ -0,0 +1,115 @@
+import whitespace from "./whitespace";
+import * as parens from "./parentheses";
+import each from "lodash/collection/each";
+import some from "lodash/collection/some";
+import t from "../../types";
+
+var find = function (obj, node, parent) {
+  if (!obj) return;
+  var result;
+
+  var types = Object.keys(obj);
+  for (var i = 0; i < types.length; i++) {
+    var type = types[i];
+
+    if (t.is(type, node)) {
+      var fn = obj[type];
+      result = fn(node, parent);
+      if (result != null) break;
+    }
+  }
+
+  return result;
+};
+
+export default class Node {
+  constructor(node, parent) {
+    this.parent = parent;
+    this.node   = node;
+  }
+
+  static isUserWhitespacable(node) {
+    return t.isUserWhitespacable(node);
+  }
+
+  static needsWhitespace(node, parent, type) {
+    if (!node) return 0;
+
+    if (t.isExpressionStatement(node)) {
+      node = node.expression;
+    }
+
+    var linesInfo = find(whitespace.nodes, node, parent);
+
+    if (!linesInfo) {
+      var items = find(whitespace.list, node, parent);
+      if (items) {
+        for (var i = 0; i < items.length; i++) {
+          linesInfo = Node.needsWhitespace(items[i], node, type);
+          if (linesInfo) break;
+        }
+      }
+    }
+
+    return (linesInfo && linesInfo[type]) || 0;
+  }
+
+  static needsWhitespaceBefore(node, parent) {
+    return Node.needsWhitespace(node, parent, "before");
+  }
+
+  static needsWhitespaceAfter(node, parent) {
+    return Node.needsWhitespace(node, parent, "after");
+  }
+
+  static needsParens(node, parent) {
+    if (!parent) return false;
+
+    if (t.isNewExpression(parent) && parent.callee === node) {
+      if (t.isCallExpression(node)) return true;
+
+      var hasCall = some(node, function (val) {
+        return t.isCallExpression(val);
+      });
+      if (hasCall) return true;
+    }
+
+    return find(parens, node, parent);
+  }
+
+  static needsParensNoLineTerminator(node, parent) {
+    if (!parent) return false;
+
+    // no comments
+    if (!node.leadingComments || !node.leadingComments.length) {
+      return false;
+    }
+
+    if (t.isYieldExpression(parent) || t.isAwaitExpression(parent)) {
+      return true;
+    }
+
+    if (t.isContinueStatement(parent) || t.isBreakStatement(parent) ||
+        t.isReturnStatement(parent) || t.isThrowStatement(parent)) {
+      return true;
+    }
+
+    return false;
+  }
+}
+
+each(Node, function (fn, key) {
+  Node.prototype[key] = function () {
+    // Avoid leaking arguments to prevent deoptimization
+    var args = new Array(arguments.length + 2);
+
+    args[0] = this.node;
+    args[1] = this.parent;
+
+    for (var i = 0; i < args.length; i++) {
+      args[i + 2] = arguments[i];
+    }
+
+    return Node[key].apply(null, args);
+  };
+});

src/babel/generation/node/parentheses.js

@@ -1,7 +1,5 @@
-"use strict";
-
-var t    = require("../../types");
-var each = require("lodash/collection/each");
+import each from "lodash/collection/each";
+import t from "../../types";
 
 var PRECEDENCE = {};
 
@@ -23,14 +21,14 @@ each([
   });
 });
 
-exports.UpdateExpression = function (node, parent) {
+export function UpdateExpression(node, parent) {
   if (t.isMemberExpression(parent) && parent.object === node) {
     // (foo++).test()
     return true;
   }
-};
+}
 
-exports.ObjectExpression = function (node, parent) {
+export function ObjectExpression(node, parent) {
   if (t.isExpressionStatement(parent)) {
     // ({ foo: "bar" });
     return true;
@@ -42,9 +40,9 @@ exports.ObjectExpression = function (node, parent) {
   }
 
   return false;
-};
+}
 
-exports.Binary = function (node, parent) {
+export function Binary(node, parent) {
   if ((t.isCallExpression(parent) || t.isNewExpression(parent)) && parent.callee === node) {
     return true;
   }
@@ -72,9 +70,9 @@ exports.Binary = function (node, parent) {
       return true;
     }
   }
-};
+}
 
-exports.BinaryExpression = function (node, parent) {
+export function BinaryExpression(node, parent) {
   if (node.operator === "in") {
     // var i = (1 in []);
     if (t.isVariableDeclarator(parent)) {
@@ -86,9 +84,9 @@ exports.BinaryExpression = function (node, parent) {
       return true;
     }
   }
-};
+}
 
-exports.SequenceExpression = function (node, parent) {
+export function SequenceExpression(node, parent) {
   if (t.isForStatement(parent)) {
     // Although parentheses wouldn't hurt around sequence
     // expressions in the head of for loops, traditional style
@@ -104,9 +102,9 @@ exports.SequenceExpression = function (node, parent) {
   // Otherwise err on the side of overparenthesization, adding
   // explicit exceptions above if this proves overzealous.
   return true;
-};
+}
 
-exports.YieldExpression = function (node, parent) {
+export function YieldExpression(node, parent) {
   return t.isBinary(parent) ||
          t.isUnaryLike(parent) ||
          t.isCallExpression(parent) ||
@@ -114,17 +112,17 @@ exports.YieldExpression = function (node, parent) {
          t.isNewExpression(parent) ||
          t.isConditionalExpression(parent) ||
          t.isYieldExpression(parent);
-};
+}
 
-exports.ClassExpression = function (node, parent) {
+export function ClassExpression(node, parent) {
   return t.isExpressionStatement(parent);
-};
+}
 
-exports.UnaryLike = function (node, parent) {
+export function UnaryLike(node, parent) {
   return t.isMemberExpression(parent) && parent.object === node;
-};
+}
 
-exports.FunctionExpression = function (node, parent) {
+export function FunctionExpression(node, parent) {
   // function () {};
   if (t.isExpressionStatement(parent)) {
     return true;
@@ -139,7 +137,7 @@ exports.FunctionExpression = function (node, parent) {
   if (t.isCallExpression(parent) && parent.callee === node) {
     return true;
   }
-};
+}
 
 exports.AssignmentExpression =
 exports.ConditionalExpression = function (node, parent) {

src/babel/generation/node/whitespace.js

@@ -0,0 +1,155 @@
+import isBoolean from "lodash/lang/isBoolean";
+import each from "lodash/collection/each";
+import map from "lodash/collection/map";
+import t from "../../types";
+
+function crawl(node, state = {}) {
+  if (t.isMemberExpression(node)) {
+    crawl(node.object, state);
+    if (node.computed) crawl(node.property, state);
+  } else if (t.isBinary(node) || t.isAssignmentExpression(node)) {
+    crawl(node.left, state);
+    crawl(node.right, state);
+  } else if (t.isCallExpression(node)) {
+    state.hasCall = true;
+    crawl(node.callee, state);
+  } else if (t.isFunction(node)) {
+    state.hasFunction = true;
+  } else if (t.isIdentifier(node)) {
+    state.hasHelper ||= isHelper(node.callee);
+  }
+
+  return state;
+}
+
+function isHelper(node) {
+  if (t.isMemberExpression(node)) {
+    return isHelper(node.object) || isHelper(node.property);
+  } else if (t.isIdentifier(node)) {
+    return node.name === "require" || node.name[0] === "_";
+  } else if (t.isCallExpression(node)) {
+    return isHelper(node.callee);
+  } else if (t.isBinary(node) || t.isAssignmentExpression(node)) {
+    return (t.isIdentifier(node.left) && isHelper(node.left)) || isHelper(node.right);
+  } else {
+    return false;
+  }
+}
+
+function isType(node) {
+  return t.isLiteral(node) || t.isObjectExpression(node) || t.isArrayExpression(node) ||
+         t.isIdentifier(node) || t.isMemberExpression(node);
+}
+
+exports.nodes = {
+  AssignmentExpression(node) {
+    var state = crawl(node.right);
+    if ((state.hasCall && state.hasHelper) || state.hasFunction) {
+      return {
+        before: state.hasFunction,
+        after: true
+      };
+    }
+  },
+
+  SwitchCase(node, parent) {
+    return {
+      before: node.consequent.length || parent.cases[0] === node
+    };
+  },
+
+  LogicalExpression(node) {
+    if (t.isFunction(node.left) || t.isFunction(node.right)) {
+      return {
+        after: true
+      };
+    }
+  },
+
+  Literal(node) {
+    if (node.value === "use strict") {
+      return {
+        after: true
+      };
+    }
+  },
+
+  CallExpression(node) {
+    if (t.isFunction(node.callee) || isHelper(node)) {
+      return {
+        before: true,
+        after: true
+      };
+    }
+  },
+
+  VariableDeclaration(node) {
+    for (var i = 0; i < node.declarations.length; i++) {
+      var declar = node.declarations[i];
+
+      var enabled = isHelper(declar.id) && !isType(declar.init);
+      if (!enabled) {
+        var state = crawl(declar.init);
+        enabled = (isHelper(declar.init) && state.hasCall) || state.hasFunction;
+      }
+
+      if (enabled) {
+        return {
+          before: true,
+          after: true
+        };
+      }
+    }
+  },
+
+  IfStatement(node) {
+    if (t.isBlockStatement(node.consequent)) {
+      return {
+        before: true,
+        after: true
+      };
+    }
+  }
+};
+
+exports.nodes.Property =
+exports.nodes.SpreadProperty = function (node, parent) {
+  if (parent.properties[0] === node) {
+    return {
+      before: true
+    };
+  }
+};
+
+exports.list = {
+  VariableDeclaration(node) {
+    return map(node.declarations, "init");
+  },
+
+  ArrayExpression(node) {
+    return node.elements;
+  },
+
+  ObjectExpression(node) {
+    return node.properties;
+  }
+};
+
+each({
+  Function: true,
+  Class: true,
+  Loop: true,
+  LabeledStatement: true,
+  SwitchStatement: true,
+  TryStatement: true
+}, function (amounts, type) {
+  if (isBoolean(amounts)) {
+    amounts = { after: amounts, before: amounts };
+  }
+
+  each([type].concat(t.FLIPPED_ALIAS_KEYS[type] || []), function (type) {
+    exports.nodes[type] = function () {
+      return amounts;
+    };
+  });
+});