remove do expressions

CHANGELOG.md

@@ -13,6 +13,10 @@ _Note: Gaps between patch versions are faulty, broken or test releases._
 
 See [CHANGELOG - 6to5](CHANGELOG-6to5.md) for the pre-4.0.0 version changelog.
 
+## 5.6.19
+
+ * Removed do expressions.
+
 ## 5.6.17
 
  * **Bug Fix**

src/acorn/src/expression.js

@@ -281,20 +281,6 @@ pp.parseExprAtom = function(refShorthandDefaultPos) {
   case tt._yield:
     if (this.inGenerator) this.unexpected()
 
-  case tt._do:
-    if (this.options.features["es7.doExpressions"]) {
-      let node = this.startNode()
-      this.next()
-      var oldInFunction = this.inFunction
-      var oldLabels = this.labels
-      this.labels = []
-      this.inFunction = false
-      node.body = this.parseBlock()
-      this.inFunction = oldInFunction
-      this.labels = oldLabels
-      return this.finishNode(node, "DoExpression")
-    }
-
   case tt.name:
     let start = this.markPosition()
     node = this.startNode()

src/babel/transformation/transformers/es7/do-expressions.js

@@ -1,26 +0,0 @@
-import * as t from "../../../types";
-
-export var metadata = {
-  optional: true,
-  stage: 0
-};
-
-/**
- * [Please add a description.]
- */
-
-export var visitor = {
-
-  /**
-   * [Please add a description.]
-   */
-
-  DoExpression(node) {
-    var body = node.body.body;
-    if (body.length) {
-      return body;
-    } else {
-      return t.identifier("undefined");
-    }
-  }
-};

src/babel/transformation/transformers/index.js

@@ -48,7 +48,6 @@ export default {
   "es6.constants":                         require("./es6/constants"),
   "es7.exportExtensions":                  require("./es7/export-extensions"),
   "spec.protoToAssign":                    require("babel-plugin-proto-to-assign"),
-  "es7.doExpressions":                     require("./es7/do-expressions"),
   "es6.spec.symbols":                      require("./es6/spec.symbols"),
   "es7.functionBind":                      require("./es7/function-bind"),
   "spec.undefinedToVoid":                  require("babel-plugin-undefined-to-void"),

src/babel/types/alias-keys.json

@@ -64,7 +64,6 @@
   "CallExpression":            ["Expression"],
   "ComprehensionExpression":   ["Expression", "Scopable"],
   "ConditionalExpression":     ["Expression"],
-  "DoExpression":              ["Expression"],
   "Identifier":                ["Expression"],
   "Literal":                   ["Expression", "Pure"],
   "MemberExpression":          ["Expression"],

src/babel/types/visitor-keys.json

@@ -21,7 +21,6 @@
   "Decorator":                 ["expression"],
   "DebuggerStatement":         [],
   "DoWhileStatement":          ["body", "test"],
-  "DoExpression":              ["body"],
   "EmptyStatement":            [],
   "ExpressionStatement":       ["expression"],
   "File":                      ["program"],

test/core/fixtures/transformation/es7.do-expressions/do-while.js

@@ -1,5 +0,0 @@
-assert.equal(do {
-  var i = 5;
-  do { i--; } while(i > 3);
-  i;
-}, 3);

test/core/fixtures/transformation/es7.do-expressions/empty.js

@@ -1 +0,0 @@
-assert.equal(do {}, undefined);

test/core/fixtures/transformation/es7.do-expressions/for-in.js

@@ -1,6 +0,0 @@
-assert.equal(do {
-  var obj = { foo: "bar", bar: "foo" };
-  for (var key in obj) {
-    obj[key];
-  }
-}, "foo");

test/core/fixtures/transformation/es7.do-expressions/for.js

@@ -1,5 +0,0 @@
-assert.equal(do {
-  for (var i = 0; i < 5; i++) {
-    i;
-  }
-}, 4);

test/core/fixtures/transformation/es7.do-expressions/if-else-if.js

@@ -1,7 +0,0 @@
-assert.equal(do {
-  if (false) {
-    "foo";
-  } else if (true) {
-    "bar";
-  }
-}, "bar");

test/core/fixtures/transformation/es7.do-expressions/if-else.js

@@ -1,7 +0,0 @@
-assert.equal(do {
-  if (false) {
-    "foo";
-  } else {
-    "bar";
-  }
-}, "bar");

test/core/fixtures/transformation/es7.do-expressions/if.js

@@ -1,5 +0,0 @@
-assert.equal(do {
-  if (true) {
-    "bar";
-  }
-}, "bar");

test/core/fixtures/transformation/es7.do-expressions/options.json

@@ -1,3 +0,0 @@
-{
-  "optional": ["es7.doExpressions"]
-}

test/core/fixtures/transformation/es7.do-expressions/single-expression.js

@@ -1,3 +0,0 @@
-assert.equal(do {
-  "foo";
-}, "foo");

test/core/fixtures/transformation/es7.do-expressions/variable-declaration-end.js

@@ -1,3 +0,0 @@
-assert.equal(do {
-  var bar = "foo";
-}, undefined);

test/core/fixtures/transformation/es7.do-expressions/variable-declaration-start.js

@@ -1,4 +0,0 @@
-assert.equal(do {
-  var bar = "foo";
-  bar;
-}, "foo");

test/core/fixtures/transformation/es7.do-expressions/while.js

@@ -1,5 +0,0 @@
-assert.equal(do {
-  var i = 5;
-  while (i > 3) i--;
-  i;
-}, 3);