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Implement assumptions defined in the babel/rfcs#5 RFC

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- `mutableTemplateObject` and `ignoreToPrimitiveHint` (#12408)
- `setClassMethods` (#12407)
- `setComputedProperties` (#12490)
- `ignoreFunctionLength` (#12491)
- `noDocumentAll` (#12481)
- `iterableIsArray` and `arrayLikeIsIterable` (#12489)
- `pureGetters` (#12504)
- `skipForOfIteratorClosing` (#12496)
- `objectRestNoSymbols`, `setSpreadProperties` and `pureGetters` (#12505)
- `noNewArrows` (#12613, #12793)
- `setPublicClassFields` and `privateFieldsAsProperties` (#12497)
- `constantReexports` and `enumerableModuleMeta` (#12618)
- `constantSuper`, `superIsCallableConstructor` and `noClassCalls` (#12726)

Co-authored-by: Justin Ridgewell <justin@ridgewell.name>
Co-authored-by: Huáng Jùnliàng <JLHwung@users.noreply.github.com>
This commit is contained in:
Nicolò Ribaudo
2020-12-11 20:28:38 +01:00
parent 7965c15557
commit 6ef7b51a11
586 changed files with 5747 additions and 201 deletions
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44
packages/babel-plugin-transform-destructuring/src/index.js
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@@ -4,17 +4,13 @@ import { types as t } from "@babel/core";
export default declare((api, options) => {
api.assertVersion(7);
const {
loose = false,
useBuiltIns = false,
allowArrayLike = false,
} = options;
const { useBuiltIns = false } = options;
if (typeof loose !== "boolean") {
throw new Error(`.loose must be a boolean or undefined`);
}
const arrayOnlySpread = loose;
const iterableIsArray = api.assumption("iterableIsArray") ?? options.loose;
const arrayLikeIsIterable =
options.allowArrayLike ?? api.assumption("arrayLikeIsIterable");
const objectRestNoSymbols =
api.assumption("objectRestNoSymbols") ?? options.loose;
function getExtendsHelper(file) {
return useBuiltIns
@@ -88,8 +84,8 @@ export default declare((api, options) => {
this.nodes = opts.nodes || [];
this.scope = opts.scope;
this.kind = opts.kind;
this.arrayOnlySpread = opts.arrayOnlySpread;
this.allowArrayLike = opts.allowArrayLike;
this.iterableIsArray = opts.iterableIsArray;
this.arrayLikeIsIterable = opts.arrayLikeIsIterable;
this.addHelper = opts.addHelper;
}
@@ -141,12 +137,12 @@ export default declare((api, options) => {
toArray(node, count) {
if (
this.arrayOnlySpread ||
this.iterableIsArray ||
(t.isIdentifier(node) && this.arrays[node.name])
) {
return node;
} else {
return this.scope.toArray(node, count, this.allowArrayLike);
return this.scope.toArray(node, count, this.arrayLikeIsIterable);
}
}
@@ -235,7 +231,9 @@ export default declare((api, options) => {
}
value = t.callExpression(
this.addHelper(`objectWithoutProperties${loose ? "Loose" : ""}`),
this.addHelper(
`objectWithoutProperties${objectRestNoSymbols ? "Loose" : ""}`,
),
[t.cloneNode(objRef), keyExpression],
);
}
@@ -527,8 +525,8 @@ export default declare((api, options) => {
kind: left.kind,
scope: scope,
nodes: nodes,
arrayOnlySpread,
allowArrayLike,
iterableIsArray,
arrayLikeIsIterable,
addHelper: name => this.addHelper(name),
});
@@ -553,8 +551,8 @@ export default declare((api, options) => {
kind: "let",
scope: scope,
nodes: nodes,
arrayOnlySpread,
allowArrayLike,
iterableIsArray,
arrayLikeIsIterable,
addHelper: name => this.addHelper(name),
});
destructuring.init(pattern, ref);
@@ -572,8 +570,8 @@ export default declare((api, options) => {
operator: node.operator,
scope: scope,
nodes: nodes,
arrayOnlySpread,
allowArrayLike,
iterableIsArray,
arrayLikeIsIterable,
addHelper: name => this.addHelper(name),
});
@@ -631,8 +629,8 @@ export default declare((api, options) => {
nodes: nodes,
scope: scope,
kind: node.kind,
arrayOnlySpread,
allowArrayLike,
iterableIsArray,
arrayLikeIsIterable,
addHelper: name => this.addHelper(name),
});

6
packages/babel-plugin-transform-destructuring/test/fixtures/assumption-arrayLikeIsIterable/holes/exec.js vendored Normal file
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@@ -0,0 +1,6 @@
var o = { 0: "a", 2: "c", length: 3 };
var [...rest] = o;
expect(rest).toEqual(["a", undefined, "c"]);
expect(1 in rest).toBe(true); // Not holey

6
packages/babel-plugin-transform-destructuring/test/fixtures/assumption-arrayLikeIsIterable/length-cropped/exec.js vendored Normal file
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@@ -0,0 +1,6 @@
var o = { 0: "a", 1: "b", 2: "c", length: 2 };
var [first, ...rest] = o;
expect(first).toBe("a");
expect(rest).toEqual(["b"]);

9
packages/babel-plugin-transform-destructuring/test/fixtures/assumption-arrayLikeIsIterable/options.json vendored Normal file
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@@ -0,0 +1,9 @@
{
"plugins": [
["external-helpers", { "helperVersion": "7.100.0" }],
"transform-destructuring"
],
"assumptions": {
"arrayLikeIsIterable": true
}
}

6
packages/babel-plugin-transform-destructuring/test/fixtures/assumption-arrayLikeIsIterable/simple/exec.js vendored Normal file
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@@ -0,0 +1,6 @@
var o = { 0: "a", 1: "b", 2: "c", length: 3 };
var [first, ...rest] = o;
expect(first).toBe("a");
expect(rest).toEqual(["b", "c"]);

1
packages/babel-plugin-transform-destructuring/test/fixtures/assumption-arrayLikeIsIterable/simple/input.js vendored Normal file
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@@ -0,0 +1 @@
var [first, ...rest] = o;

4
packages/babel-plugin-transform-destructuring/test/fixtures/assumption-arrayLikeIsIterable/simple/output.js vendored Normal file
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@@ -0,0 +1,4 @@
var _o = o,
_o2 = babelHelpers.maybeArrayLike(babelHelpers.toArray, _o),
first = _o2[0],
rest = _o2.slice(1);

1
packages/babel-plugin-transform-destructuring/test/fixtures/assumption-iterableIsArray/basic/input.js vendored Normal file
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@@ -0,0 +1 @@
let [foo, bar] = baz;

3
packages/babel-plugin-transform-destructuring/test/fixtures/assumption-iterableIsArray/basic/output.js vendored Normal file
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@@ -0,0 +1,3 @@
let _baz = baz,
foo = _baz[0],
bar = _baz[1];

7
packages/babel-plugin-transform-destructuring/test/fixtures/assumption-iterableIsArray/for-in/input.js vendored Normal file
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@@ -0,0 +1,7 @@
for (var [name, value] in obj) {
print("Name: " + name + ", Value: " + value);
}
for ([name, value] in obj) {
print("Name: " + name + ", Value: " + value);
}

11
packages/babel-plugin-transform-destructuring/test/fixtures/assumption-iterableIsArray/for-in/output.js vendored Normal file
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@@ -0,0 +1,11 @@
for (var _ref in obj) {
var name = _ref[0];
var value = _ref[1];
print("Name: " + name + ", Value: " + value);
}
for (var _ref2 in obj) {
name = _ref2[0];
value = _ref2[1];
print("Name: " + name + ", Value: " + value);
}

9
packages/babel-plugin-transform-destructuring/test/fixtures/assumption-iterableIsArray/options.json vendored Normal file
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@@ -0,0 +1,9 @@
{
"plugins": [
["external-helpers", { "helperVersion": "7.100.0" }],
"transform-destructuring"
],
"assumptions": {
"iterableIsArray": true
}
}

9
packages/babel-plugin-transform-destructuring/test/fixtures/assumption-objectRestNoSymbols/options.json vendored Normal file
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@@ -0,0 +1,9 @@
{
"plugins": [
["external-helpers", { "helperVersion": "7.100.0"}],
"transform-destructuring"
],
"assumptions": {
"objectRestNoSymbols": true
}
}

1
packages/babel-plugin-transform-destructuring/test/fixtures/assumption-objectRestNoSymbols/rest-assignment-expression/input.js vendored Normal file
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@@ -0,0 +1 @@
({ a, b, ...c } = obj);

5
packages/babel-plugin-transform-destructuring/test/fixtures/assumption-objectRestNoSymbols/rest-assignment-expression/output.js vendored Normal file
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@@ -0,0 +1,5 @@
var _obj = obj;
a = _obj.a;
b = _obj.b;
c = babelHelpers.objectWithoutPropertiesLoose(_obj, ["a", "b"]);
_obj;

1
packages/babel-plugin-transform-destructuring/test/fixtures/assumption-objectRestNoSymbols/rest-computed/input.js vendored Normal file
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@@ -0,0 +1 @@
let { [a]: b, ...c } = obj;

4
packages/babel-plugin-transform-destructuring/test/fixtures/assumption-objectRestNoSymbols/rest-computed/output.js vendored Normal file
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@@ -0,0 +1,4 @@
let _obj = obj,
_a = a,
b = _obj[_a],
c = babelHelpers.objectWithoutPropertiesLoose(_obj, [_a].map(babelHelpers.toPropertyKey));

7
packages/babel-plugin-transform-destructuring/test/fixtures/assumption-objectRestNoSymbols/rest-ignore-symbols/exec.js vendored Normal file
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@@ -0,0 +1,7 @@
let sym = Symbol();
let { a, ...r } = { a: 1, b: 2, [sym]: 3 };
expect(a).toBe(1);
expect(r.b).toBe(2);
expect(sym in r).toBe(false);

1
packages/babel-plugin-transform-destructuring/test/fixtures/assumption-objectRestNoSymbols/rest-nested/input.js vendored Normal file
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@@ -0,0 +1 @@
let { a, nested: { b, c, ...d }, e } = obj;

7
packages/babel-plugin-transform-destructuring/test/fixtures/assumption-objectRestNoSymbols/rest-nested/output.js vendored Normal file
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@@ -0,0 +1,7 @@
let _obj = obj,
a = _obj.a,
_obj$nested = _obj.nested,
b = _obj$nested.b,
c = _obj$nested.c,
d = babelHelpers.objectWithoutPropertiesLoose(_obj$nested, ["b", "c"]),
e = _obj.e;

1
packages/babel-plugin-transform-destructuring/test/fixtures/assumption-objectRestNoSymbols/rest-var-declaration/input.js vendored Normal file
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@@ -0,0 +1 @@
var { a, b, ...c } = obj;

4
packages/babel-plugin-transform-destructuring/test/fixtures/assumption-objectRestNoSymbols/rest-var-declaration/output.js vendored Normal file
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@@ -0,0 +1,4 @@
var _obj = obj,
a = _obj.a,
b = _obj.b,
c = babelHelpers.objectWithoutPropertiesLoose(_obj, ["a", "b"]);