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6.0.0

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I'm extremely stupid and didn't commit as I go. To anyone reading this
I'm extremely sorry. A lot of these changes are very broad and I plan on
releasing Babel 6.0.0 today live on stage at Ember Camp London so I'm
afraid I couldn't wait. If you're ever in London I'll buy you a beer
(or assorted beverage!) to make up for it, also I'll kiss your feet and
give you a back massage, maybe.
This commit is contained in:
Sebastian McKenzie
2015-10-29 17:51:24 +00:00
parent 3974dd762d
commit ae7d5367f1
1501 changed files with 16477 additions and 19786 deletions
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149
packages/babel-plugin-transform-es2015-destructuring/src/index.js
View File

@@ -1,11 +1,11 @@
export default function ({ types: t, messages }) {
export default function ({ types: t }) {
/**
* Test if a VariableDeclaration's declarations contains any Patterns.
*/
function variableDeclarationHasPattern(node) {
for (var declar of (node.declarations: Array)) {
for (let declar of (node.declarations: Array)) {
if (t.isPattern(declar.id)) {
return true;
}
@@ -18,7 +18,7 @@ export default function ({ types: t, messages }) {
*/
function hasRest(pattern) {
for (var elem of (pattern.elements: Array)) {
for (let elem of (pattern.elements: Array)) {
if (t.isRestElement(elem)) {
return true;
}
@@ -26,7 +26,7 @@ export default function ({ types: t, messages }) {
return false;
}
var arrayUnpackVisitor = {
let arrayUnpackVisitor = {
ReferencedIdentifier(path, state) {
if (state.bindings[path.node.name]) {
state.deopt = true;
@@ -47,10 +47,10 @@ export default function ({ types: t, messages }) {
}
buildVariableAssignment(id, init) {
var op = this.operator;
let op = this.operator;
if (t.isMemberExpression(id)) op = "=";
var node;
let node;
if (op) {
node = t.expressionStatement(t.assignmentExpression(op, id, init));
@@ -66,7 +66,7 @@ export default function ({ types: t, messages }) {
}
buildVariableDeclaration(id, init) {
var declar = t.variableDeclaration("var", [
let declar = t.variableDeclaration("var", [
t.variableDeclarator(id, init)
]);
declar._blockHoist = this.blockHoist;
@@ -97,9 +97,9 @@ export default function ({ types: t, messages }) {
// we need to assign the current value of the assignment to avoid evaluating
// it more than once
var tempValueRef = this.scope.generateUidIdentifierBasedOnNode(valueRef);
let tempValueRef = this.scope.generateUidIdentifierBasedOnNode(valueRef);
var declar = t.variableDeclaration("var", [
let declar = t.variableDeclaration("var", [
t.variableDeclarator(tempValueRef, valueRef)
]);
declar._blockHoist = this.blockHoist;
@@ -107,15 +107,15 @@ export default function ({ types: t, messages }) {
//
var tempConditional = t.conditionalExpression(
let tempConditional = t.conditionalExpression(
t.binaryExpression("===", tempValueRef, t.identifier("undefined")),
pattern.right,
tempValueRef
);
var left = pattern.left;
let left = pattern.left;
if (t.isPattern(left)) {
var tempValueDefault = t.expressionStatement(
let tempValueDefault = t.expressionStatement(
t.assignmentExpression("=", tempValueRef, tempConditional)
);
tempValueDefault._blockHoist = this.blockHoist;
@@ -130,10 +130,10 @@ export default function ({ types: t, messages }) {
pushObjectRest(pattern, objRef, spreadProp, spreadPropIndex) {
// get all the keys that appear in this object before the current spread
var keys = [];
let keys = [];
for (var i = 0; i < pattern.properties.length; i++) {
var prop = pattern.properties[i];
for (let i = 0; i < pattern.properties.length; i++) {
let prop = pattern.properties[i];
// we've exceeded the index of the spread property to all properties to the
// right need to be ignored
@@ -142,7 +142,7 @@ export default function ({ types: t, messages }) {
// ignore other spread properties
if (t.isRestProperty(prop)) continue;
var key = prop.key;
let key = prop.key;
if (t.isIdentifier(key) && !prop.computed) key = t.stringLiteral(prop.key.name);
keys.push(key);
}
@@ -151,15 +151,15 @@ export default function ({ types: t, messages }) {
//
var value = t.callExpression(this.file.addHelper("object-without-properties"), [objRef, keys]);
let value = t.callExpression(this.file.addHelper("objectWithoutProperties"), [objRef, keys]);
this.nodes.push(this.buildVariableAssignment(spreadProp.argument, value));
}
pushObjectProperty(prop, propRef) {
if (t.isLiteral(prop.key)) prop.computed = true;
var pattern = prop.value;
var objRef = t.memberExpression(propRef, prop.key, prop.computed);
let pattern = prop.value;
let objRef = t.memberExpression(propRef, prop.key, prop.computed);
if (t.isPattern(pattern)) {
this.push(pattern, objRef);
@@ -173,7 +173,7 @@ export default function ({ types: t, messages }) {
if (!pattern.properties.length) {
this.nodes.push(t.expressionStatement(
t.callExpression(this.file.addHelper("object-destructuring-empty"), [objRef])
t.callExpression(this.file.addHelper("objectDestructuringEmpty"), [objRef])
));
}
@@ -182,15 +182,15 @@ export default function ({ types: t, messages }) {
// only evaluated once
if (pattern.properties.length > 1 && !this.scope.isStatic(objRef)) {
var temp = this.scope.generateUidIdentifierBasedOnNode(objRef);
let temp = this.scope.generateUidIdentifierBasedOnNode(objRef);
this.nodes.push(this.buildVariableDeclaration(temp, objRef));
objRef = temp;
}
//
for (var i = 0; i < pattern.properties.length; i++) {
var prop = pattern.properties[i];
for (let i = 0; i < pattern.properties.length; i++) {
let prop = pattern.properties[i];
if (t.isRestProperty(prop)) {
this.pushObjectRest(pattern, objRef, prop, i);
} else {
@@ -222,15 +222,15 @@ export default function ({ types: t, messages }) {
}
// deopt on reference to left side identifiers
var bindings = t.getBindingIdentifiers(pattern);
var state = { deopt: false, bindings };
let bindings = t.getBindingIdentifiers(pattern);
let state = { deopt: false, bindings };
this.scope.traverse(arr, arrayUnpackVisitor, state);
return !state.deopt;
}
pushUnpackedArrayPattern(pattern, arr) {
for (var i = 0; i < pattern.elements.length; i++) {
var elem = pattern.elements[i];
for (let i = 0; i < pattern.elements.length; i++) {
let elem = pattern.elements[i];
if (t.isRestElement(elem)) {
this.push(elem.argument, t.arrayExpression(arr.elements.slice(i)));
} else {
@@ -247,7 +247,7 @@ export default function ({ types: t, messages }) {
// we can't do this to a pattern of unequal size to it's right hand
// array expression as then there will be values that wont be evaluated
//
// eg: var [a, b] = [1, 2];
// eg: let [a, b] = [1, 2];
if (this.canUnpackArrayPattern(pattern, arrayRef)) {
return this.pushUnpackedArrayPattern(pattern, arrayRef);
@@ -256,13 +256,13 @@ export default function ({ types: t, messages }) {
// if we have a rest then we need all the elements so don't tell
// `scope.toArray` to only get a certain amount
var count = !hasRest(pattern) && pattern.elements.length;
let count = !hasRest(pattern) && pattern.elements.length;
// so we need to ensure that the `arrayRef` is an array, `scope.toArray` will
// return a locally bound identifier if it's been inferred to be an array,
// otherwise it'll be a call to a helper that will ensure it's one
var toArray = this.toArray(arrayRef, count);
let toArray = this.toArray(arrayRef, count);
if (t.isIdentifier(toArray)) {
// we've been given an identifier so it must have been inferred to be an
@@ -276,13 +276,13 @@ export default function ({ types: t, messages }) {
//
for (var i = 0; i < pattern.elements.length; i++) {
var elem = pattern.elements[i];
for (let i = 0; i < pattern.elements.length; i++) {
let elem = pattern.elements[i];
// hole
if (!elem) continue;
var elemRef;
let elemRef;
if (t.isRestElement(elem)) {
elemRef = this.toArray(arrayRef);
@@ -307,7 +307,7 @@ export default function ({ types: t, messages }) {
// need to save it to a variable
if (!t.isArrayExpression(ref) && !t.isMemberExpression(ref)) {
var memo = this.scope.maybeGenerateMemoised(ref, true);
let memo = this.scope.maybeGenerateMemoised(ref, true);
if (memo) {
this.nodes.push(this.buildVariableDeclaration(memo, ref));
ref = memo;
@@ -326,13 +326,13 @@ export default function ({ types: t, messages }) {
return {
visitor: {
ForXStatement(path, file) {
var { node, scope } = path;
var left = node.left;
let { node, scope } = path;
let left = node.left;
if (t.isPattern(left)) {
// for ({ length: k } in { abc: 3 });
var temp = scope.generateUidIdentifier("ref");
let temp = scope.generateUidIdentifier("ref");
node.left = t.variableDeclaration("var", [
t.variableDeclarator(temp)
@@ -349,17 +349,17 @@ export default function ({ types: t, messages }) {
if (!t.isVariableDeclaration(left)) return;
var pattern = left.declarations[0].id;
let pattern = left.declarations[0].id;
if (!t.isPattern(pattern)) return;
var key = scope.generateUidIdentifier("ref");
let key = scope.generateUidIdentifier("ref");
node.left = t.variableDeclaration(left.kind, [
t.variableDeclarator(key, null)
]);
var nodes = [];
let nodes = [];
var destructuring = new DestructuringTransformer({
let destructuring = new DestructuringTransformer({
kind: left.kind,
file: file,
scope: scope,
@@ -370,20 +370,20 @@ export default function ({ types: t, messages }) {
path.ensureBlock();
var block = node.body;
let block = node.body;
block.body = nodes.concat(block.body);
},
CatchClause({ node, scope }, file) {
var pattern = node.param;
let pattern = node.param;
if (!t.isPattern(pattern)) return;
var ref = scope.generateUidIdentifier("ref");
let ref = scope.generateUidIdentifier("ref");
node.param = ref;
var nodes = [];
let nodes = [];
var destructuring = new DestructuringTransformer({
let destructuring = new DestructuringTransformer({
kind: "let",
file: file,
scope: scope,
@@ -395,19 +395,19 @@ export default function ({ types: t, messages }) {
},
AssignmentExpression(path, file) {
var { node, scope } = path;
let { node, scope } = path;
if (!t.isPattern(node.left)) return;
var nodes = [];
let nodes = [];
var destructuring = new DestructuringTransformer({
let destructuring = new DestructuringTransformer({
operator: node.operator,
file: file,
scope: scope,
nodes: nodes
});
var ref;
let ref;
if (path.isCompletionRecord() || !path.parentPath.isExpressionStatement()) {
ref = scope.generateUidIdentifierBasedOnNode(node.right, "ref");
@@ -426,27 +426,30 @@ export default function ({ types: t, messages }) {
nodes.push(t.expressionStatement(ref));
}
return nodes;
path.replaceWithMultiple(nodes);
},
VariableDeclaration({ node, scope, parent }, file) {
VariableDeclaration(path, file) {
let { node, scope, parent } = path;
if (t.isForXStatement(parent)) return;
if (!parent || !path.container) return; // i don't know why this is necessary - TODO
if (!variableDeclarationHasPattern(node)) return;
var nodes = [];
var declar;
let nodes = [];
let declar;
for (var i = 0; i < node.declarations.length; i++) {
for (let i = 0; i < node.declarations.length; i++) {
declar = node.declarations[i];
var patternId = declar.init;
var pattern = declar.id;
let patternId = declar.init;
let pattern = declar.id;
var destructuring = new DestructuringTransformer({
nodes: nodes,
scope: scope,
kind: node.kind,
file: file
let destructuring = new DestructuringTransformer({
blockHoist: node._blockHoist,
nodes: nodes,
scope: scope,
kind: node.kind,
file: file
});
if (t.isPattern(pattern)) {
@@ -462,27 +465,7 @@ export default function ({ types: t, messages }) {
}
}
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.buildCodeFrameError(node, messages.get("invalidParentForThisNode"));
}
declar.declarations = declar.declarations.concat(node.declarations);
}
return declar;
}
return nodes;
path.replaceWithMultiple(nodes);
}
}
};