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Parse async do expressions (#13043)

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* parse async do expressions

* add test cases

* update test fixtures

* chore: add syntax-async-do-expressions

* generater support

* fix: do not transform async do expressions

* chore: add asyncDoExpressions to missing plugin helpers

* update ast types

* add more test cases

* throw when asyncDoExpressions is enabled but not doExpressions

* avoid add parentheses for async do expressions

* address review comments

* chore: update parser typings
This commit is contained in:
Huáng Jùnliàng 2021-04-07 12:24:33 -04:00 committed by Nicolò Ribaudo
parent f30c99aa24
commit 28d7442aae
76 changed files with 897 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
packages/babel-core/src/parser/util/missing-plugin-helper.ts
View File

@ -1,4 +1,10 @@
const pluginNameMap = {
asyncDoExpressions: {
syntax: {
name: "@babel/plugin-syntax-async-do-expressions",
url: "https://git.io/JYer8",
},
},
classProperties: {
syntax: {
name: "@babel/plugin-syntax-class-properties",

4
packages/babel-generator/src/generators/expressions.ts
View File

@ -20,6 +20,10 @@ export function UnaryExpression(this: Printer, node: t.UnaryExpression) {
}
export function DoExpression(this: Printer, node: t.DoExpression) {
if (node.async) {
this.word("async");
this.space();
}
this.word("do");
this.space();
this.print(node.body, node);

3
packages/babel-generator/src/node/parentheses.ts
View File

@ -82,7 +82,8 @@ export function DoExpression(
parent: any,
printStack: Array<any>,
): boolean {
return isFirstInStatement(printStack);
// `async do` can start an expression statement
return !node.async && isFirstInStatement(printStack);
}
export function Binary(node: any, parent: any): boolean {

5
packages/babel-generator/test/fixtures/async-do-expressions/basic/input.js vendored Normal file
View File

@ -0,0 +1,5 @@
async do {
1;
};
(async do {});

4
packages/babel-generator/test/fixtures/async-do-expressions/basic/output.js vendored Normal file
View File

@ -0,0 +1,4 @@
async do {
1;
};
async do {};

3
packages/babel-generator/test/fixtures/async-do-expressions/options.json vendored Normal file
View File

@ -0,0 +1,3 @@
{
"plugins": ["asyncDoExpressions", "doExpressions"]
}

3
packages/babel-generator/test/fixtures/async-do-expressions/retain-lines/input.js vendored Normal file
View File

@ -0,0 +1,3 @@
/* leading comments
*/async do
{ 1 } + 0;

3
packages/babel-generator/test/fixtures/async-do-expressions/retain-lines/options.json vendored Normal file
View File

@ -0,0 +1,3 @@
{
"retainLines": true
}

3
packages/babel-generator/test/fixtures/async-do-expressions/retain-lines/output.js vendored Normal file
View File

@ -0,0 +1,3 @@
/* leading comments
*/async do
{1;} + 0;

1
packages/babel-parser/ast/spec.md
View File

@ -1084,6 +1084,7 @@ An expression wrapped by parentheses. By default `@babel/parser` does not create
interface DoExpression <: Expression {
type: "DoExpression";
body: BlockStatement;
async: boolean;
}
```

20
packages/babel-parser/src/parser/expression.js
View File

@ -1033,6 +1033,8 @@ export default class ExpressionParser extends LValParser {
);
} else if (this.match(tt.name)) {
return this.parseAsyncArrowUnaryFunction(id);
} else if (this.match(tt._do)) {
return this.parseDo(true);
}
}
@ -1049,7 +1051,7 @@ export default class ExpressionParser extends LValParser {
}
case tt._do: {
return this.parseDo();
return this.parseDo(false);
}
case tt.regexp: {
@ -1231,13 +1233,27 @@ export default class ExpressionParser extends LValParser {
}
// https://github.com/tc39/proposal-do-expressions
parseDo(): N.DoExpression {
// https://github.com/tc39/proposal-async-do-expressions
parseDo(isAsync: boolean): N.DoExpression {
this.expectPlugin("doExpressions");
if (isAsync) {
this.expectPlugin("asyncDoExpressions");
}
const node = this.startNode();
node.async = isAsync;
this.next(); // eat `do`
const oldLabels = this.state.labels;
this.state.labels = [];
if (isAsync) {
// AsyncDoExpression :
// async [no LineTerminator here] do Block[~Yield, +Await, ~Return]
this.prodParam.enter(PARAM_AWAIT);
node.body = this.parseBlock();
this.prodParam.exit();
} else {
node.body = this.parseBlock();
}
this.state.labels = oldLabels;
return this.finishNode(node, "DoExpression");
}

12
packages/babel-parser/src/plugin-utils.js
View File

@ -117,6 +117,18 @@ export function validatePlugins(plugins: PluginList) {
RECORD_AND_TUPLE_SYNTAX_TYPES.map(p => `'${p}'`).join(", "),
);
}
if (
hasPlugin(plugins, "asyncDoExpressions") &&
!hasPlugin(plugins, "doExpressions")
) {
const error = new Error(
"'asyncDoExpressions' requires 'doExpressions', please add 'doExpressions' to parser plugins.",
);
// $FlowIgnore
error.missingPlugins = "doExpressions"; // so @babel/core can provide better error message
throw error;
}
}
// These plugins are defined using a mixin which extends the parser class.

1
packages/babel-parser/src/types.js
View File

@ -402,6 +402,7 @@ export type ArrayExpression = NodeBase & {
export type DoExpression = NodeBase & {
type: "DoExpression",
body: ?BlockStatement,
async: boolean,
};
export type TupleExpression = NodeBase & {

1
packages/babel-parser/test/fixtures/experimental/_no-plugin/async-do-expressions-with-do-expressions/input.js vendored Normal file
View File

@ -0,0 +1 @@
(async do {x})

6
packages/babel-parser/test/fixtures/experimental/_no-plugin/async-do-expressions-with-do-expressions/options.json vendored Normal file
View File

@ -0,0 +1,6 @@
{
"throws": "This experimental syntax requires enabling the parser plugin: 'asyncDoExpressions' (1:7)",
"plugins": [
"doExpressions"
]
}

1
packages/babel-parser/test/fixtures/experimental/_no-plugin/async-do-expressions/input.js vendored Normal file
View File

@ -0,0 +1 @@
(async do {x})

4
packages/babel-parser/test/fixtures/experimental/_no-plugin/async-do-expressions/options.json vendored Normal file
View File

@ -0,0 +1,4 @@
{
"throws": "This experimental syntax requires enabling the parser plugin: 'doExpressions' (1:7)",
"plugins": []
}

5
packages/babel-parser/test/fixtures/experimental/async-do-expressions/asi-async-and-do-while/input.js vendored Normal file
View File

@ -0,0 +1,5 @@
async
do {
42
}
while (false);

51
packages/babel-parser/test/fixtures/experimental/async-do-expressions/asi-async-and-do-while/output.json vendored Normal file
View File

@ -0,0 +1,51 @@
{
"type": "File",
"start":0,"end":32,"loc":{"start":{"line":1,"column":0},"end":{"line":5,"column":14}},
"program": {
"type": "Program",
"start":0,"end":32,"loc":{"start":{"line":1,"column":0},"end":{"line":5,"column":14}},
"sourceType": "script",
"interpreter": null,
"body": [
{
"type": "ExpressionStatement",
"start":0,"end":5,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":5}},
"expression": {
"type": "Identifier",
"start":0,"end":5,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":5},"identifierName":"async"},
"name": "async"
}
},
{
"type": "DoWhileStatement",
"start":6,"end":32,"loc":{"start":{"line":2,"column":0},"end":{"line":5,"column":14}},
"body": {
"type": "BlockStatement",
"start":9,"end":17,"loc":{"start":{"line":2,"column":3},"end":{"line":4,"column":1}},
"body": [
{
"type": "ExpressionStatement",
"start":13,"end":15,"loc":{"start":{"line":3,"column":2},"end":{"line":3,"column":4}},
"expression": {
"type": "NumericLiteral",
"start":13,"end":15,"loc":{"start":{"line":3,"column":2},"end":{"line":3,"column":4}},
"extra": {
"rawValue": 42,
"raw": "42"
},
"value": 42
}
}
],
"directives": []
},
"test": {
"type": "BooleanLiteral",
"start":25,"end":30,"loc":{"start":{"line":5,"column":7},"end":{"line":5,"column":12}},
"value": false
}
}
],
"directives": []
}
}

4
packages/babel-parser/test/fixtures/experimental/async-do-expressions/asi-async-do-and-while/input.js vendored Normal file
View File

@ -0,0 +1,4 @@
async do {
42
}
while (false);

55
packages/babel-parser/test/fixtures/experimental/async-do-expressions/asi-async-do-and-while/output.json vendored Normal file
View File

@ -0,0 +1,55 @@
{
"type": "File",
"start":0,"end":32,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":14}},
"program": {
"type": "Program",
"start":0,"end":32,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":14}},
"sourceType": "script",
"interpreter": null,
"body": [
{
"type": "ExpressionStatement",
"start":0,"end":17,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
"expression": {
"type": "DoExpression",
"start":6,"end":17,"loc":{"start":{"line":1,"column":6},"end":{"line":3,"column":1}},
"async": true,
"body": {
"type": "BlockStatement",
"start":9,"end":17,"loc":{"start":{"line":1,"column":9},"end":{"line":3,"column":1}},
"body": [
{
"type": "ExpressionStatement",
"start":13,"end":15,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":4}},
"expression": {
"type": "NumericLiteral",
"start":13,"end":15,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":4}},
"extra": {
"rawValue": 42,
"raw": "42"
},
"value": 42
}
}
],
"directives": []
}
}
},
{
"type": "WhileStatement",
"start":18,"end":32,"loc":{"start":{"line":4,"column":0},"end":{"line":4,"column":14}},
"test": {
"type": "BooleanLiteral",
"start":25,"end":30,"loc":{"start":{"line":4,"column":7},"end":{"line":4,"column":12}},
"value": false
},
"body": {
"type": "EmptyStatement",
"start":31,"end":32,"loc":{"start":{"line":4,"column":13},"end":{"line":4,"column":14}}
}
}
],
"directives": []
}
}

4
packages/babel-parser/test/fixtures/experimental/async-do-expressions/asi/input.js vendored Normal file
View File

@ -0,0 +1,4 @@
async
do {
42
}

3
packages/babel-parser/test/fixtures/experimental/async-do-expressions/asi/options.json vendored Normal file
View File

@ -0,0 +1,3 @@
{
"throws": "Unexpected token, expected \"while\" (4:1)"
}

5
packages/babel-parser/test/fixtures/experimental/async-do-expressions/conditional-statement/input.js vendored Normal file
View File

@ -0,0 +1,5 @@
let x = async do {
if (foo()) { f() }
else if (bar()) { g() }
else { h() }
};

132
packages/babel-parser/test/fixtures/experimental/async-do-expressions/conditional-statement/output.json vendored Normal file
View File

@ -0,0 +1,132 @@
{
"type": "File",
"start":0,"end":83,"loc":{"start":{"line":1,"column":0},"end":{"line":5,"column":2}},
"program": {
"type": "Program",
"start":0,"end":83,"loc":{"start":{"line":1,"column":0},"end":{"line":5,"column":2}},
"sourceType": "script",
"interpreter": null,
"body": [
{
"type": "VariableDeclaration",
"start":0,"end":83,"loc":{"start":{"line":1,"column":0},"end":{"line":5,"column":2}},
"declarations": [
{
"type": "VariableDeclarator",
"start":4,"end":82,"loc":{"start":{"line":1,"column":4},"end":{"line":5,"column":1}},
"id": {
"type": "Identifier",
"start":4,"end":5,"loc":{"start":{"line":1,"column":4},"end":{"line":1,"column":5},"identifierName":"x"},
"name": "x"
},
"init": {
"type": "DoExpression",
"start":14,"end":82,"loc":{"start":{"line":1,"column":14},"end":{"line":5,"column":1}},
"async": true,
"body": {
"type": "BlockStatement",
"start":17,"end":82,"loc":{"start":{"line":1,"column":17},"end":{"line":5,"column":1}},
"body": [
{
"type": "IfStatement",
"start":21,"end":80,"loc":{"start":{"line":2,"column":2},"end":{"line":4,"column":14}},
"test": {
"type": "CallExpression",
"start":25,"end":30,"loc":{"start":{"line":2,"column":6},"end":{"line":2,"column":11}},
"callee": {
"type": "Identifier",
"start":25,"end":28,"loc":{"start":{"line":2,"column":6},"end":{"line":2,"column":9},"identifierName":"foo"},
"name": "foo"
},
"arguments": []
},
"consequent": {
"type": "BlockStatement",
"start":32,"end":39,"loc":{"start":{"line":2,"column":13},"end":{"line":2,"column":20}},
"body": [
{
"type": "ExpressionStatement",
"start":34,"end":37,"loc":{"start":{"line":2,"column":15},"end":{"line":2,"column":18}},
"expression": {
"type": "CallExpression",
"start":34,"end":37,"loc":{"start":{"line":2,"column":15},"end":{"line":2,"column":18}},
"callee": {
"type": "Identifier",
"start":34,"end":35,"loc":{"start":{"line":2,"column":15},"end":{"line":2,"column":16},"identifierName":"f"},
"name": "f"
},
"arguments": []
}
}
],
"directives": []
},
"alternate": {
"type": "IfStatement",
"start":47,"end":80,"loc":{"start":{"line":3,"column":7},"end":{"line":4,"column":14}},
"test": {
"type": "CallExpression",
"start":51,"end":56,"loc":{"start":{"line":3,"column":11},"end":{"line":3,"column":16}},
"callee": {
"type": "Identifier",
"start":51,"end":54,"loc":{"start":{"line":3,"column":11},"end":{"line":3,"column":14},"identifierName":"bar"},
"name": "bar"
},
"arguments": []
},
"consequent": {
"type": "BlockStatement",
"start":58,"end":65,"loc":{"start":{"line":3,"column":18},"end":{"line":3,"column":25}},
"body": [
{
"type": "ExpressionStatement",
"start":60,"end":63,"loc":{"start":{"line":3,"column":20},"end":{"line":3,"column":23}},
"expression": {
"type": "CallExpression",
"start":60,"end":63,"loc":{"start":{"line":3,"column":20},"end":{"line":3,"column":23}},
"callee": {
"type": "Identifier",
"start":60,"end":61,"loc":{"start":{"line":3,"column":20},"end":{"line":3,"column":21},"identifierName":"g"},
"name": "g"
},
"arguments": []
}
}
],
"directives": []
},
"alternate": {
"type": "BlockStatement",
"start":73,"end":80,"loc":{"start":{"line":4,"column":7},"end":{"line":4,"column":14}},
"body": [
{
"type": "ExpressionStatement",
"start":75,"end":78,"loc":{"start":{"line":4,"column":9},"end":{"line":4,"column":12}},
"expression": {
"type": "CallExpression",
"start":75,"end":78,"loc":{"start":{"line":4,"column":9},"end":{"line":4,"column":12}},
"callee": {
"type": "Identifier",
"start":75,"end":76,"loc":{"start":{"line":4,"column":9},"end":{"line":4,"column":10},"identifierName":"h"},
"name": "h"
},
"arguments": []
}
}
],
"directives": []
}
}
}
],
"directives": []
}
}
}
],
"kind": "let"
}
],
"directives": []
}
}

3
packages/babel-parser/test/fixtures/experimental/async-do-expressions/expression-statement/input.js vendored Normal file
View File

@ -0,0 +1,3 @@
async do {
await 42
}

46
packages/babel-parser/test/fixtures/experimental/async-do-expressions/expression-statement/output.json vendored Normal file
View File

@ -0,0 +1,46 @@
{
"type": "File",
"start":0,"end":23,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
"program": {
"type": "Program",
"start":0,"end":23,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
"sourceType": "script",
"interpreter": null,
"body": [
{
"type": "ExpressionStatement",
"start":0,"end":23,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
"expression": {
"type": "DoExpression",
"start":6,"end":23,"loc":{"start":{"line":1,"column":6},"end":{"line":3,"column":1}},
"async": true,
"body": {
"type": "BlockStatement",
"start":9,"end":23,"loc":{"start":{"line":1,"column":9},"end":{"line":3,"column":1}},
"body": [
{
"type": "ExpressionStatement",
"start":13,"end":21,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":10}},
"expression": {
"type": "AwaitExpression",
"start":13,"end":21,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":10}},
"argument": {
"type": "NumericLiteral",
"start":19,"end":21,"loc":{"start":{"line":2,"column":8},"end":{"line":2,"column":10}},
"extra": {
"rawValue": 42,
"raw": "42"
},
"value": 42
}
}
}
],
"directives": []
}
}
}
],
"directives": []
}
}

8
packages/babel-parser/test/fixtures/experimental/async-do-expressions/invalid-break/input.js vendored Normal file
View File

@ -0,0 +1,8 @@
function iter() {
switch(1) {
default:
var x = async do {
break;
}
}
};

94
packages/babel-parser/test/fixtures/experimental/async-do-expressions/invalid-break/output.json vendored Normal file
View File

@ -0,0 +1,94 @@
{
"type": "File",
"start":0,"end":99,"loc":{"start":{"line":1,"column":0},"end":{"line":8,"column":2}},
"errors": [
"SyntaxError: Unsyntactic break (5:8)"
],
"program": {
"type": "Program",
"start":0,"end":99,"loc":{"start":{"line":1,"column":0},"end":{"line":8,"column":2}},
"sourceType": "script",
"interpreter": null,
"body": [
{
"type": "FunctionDeclaration",
"start":0,"end":98,"loc":{"start":{"line":1,"column":0},"end":{"line":8,"column":1}},
"id": {
"type": "Identifier",
"start":9,"end":13,"loc":{"start":{"line":1,"column":9},"end":{"line":1,"column":13},"identifierName":"iter"},
"name": "iter"
},
"generator": false,
"async": false,
"params": [],
"body": {
"type": "BlockStatement",
"start":16,"end":98,"loc":{"start":{"line":1,"column":16},"end":{"line":8,"column":1}},
"body": [
{
"type": "SwitchStatement",
"start":20,"end":96,"loc":{"start":{"line":2,"column":2},"end":{"line":7,"column":3}},
"discriminant": {
"type": "NumericLiteral",
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"extra": {
"rawValue": 1,
"raw": "1"
},
"value": 1
},
"cases": [
{
"type": "SwitchCase",
"start":36,"end":92,"loc":{"start":{"line":3,"column":4},"end":{"line":6,"column":7}},
"consequent": [
{
"type": "VariableDeclaration",
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"declarations": [
{
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"id": {
"type": "Identifier",
"start":55,"end":56,"loc":{"start":{"line":4,"column":10},"end":{"line":4,"column":11},"identifierName":"x"},
"name": "x"
},
"init": {
"type": "DoExpression",
"start":65,"end":92,"loc":{"start":{"line":4,"column":20},"end":{"line":6,"column":7}},
"async": true,
"body": {
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"body": [
{
"type": "BreakStatement",
"start":78,"end":84,"loc":{"start":{"line":5,"column":8},"end":{"line":5,"column":14}},
"label": null
}
],
"directives": []
}
}
}
],
"kind": "var"
}
],
"test": null
}
]
}
],
"directives": []
}
},
{
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"start":98,"end":99,"loc":{"start":{"line":8,"column":1},"end":{"line":8,"column":2}}
}
],
"directives": []
}
}

5
packages/babel-parser/test/fixtures/experimental/async-do-expressions/invalid-generators/input.js vendored Normal file
View File

@ -0,0 +1,5 @@
async function *iter() {
await async do {
yield 1;
}
};

81
packages/babel-parser/test/fixtures/experimental/async-do-expressions/invalid-generators/output.json vendored Normal file
View File

@ -0,0 +1,81 @@
{
"type": "File",
"start":0,"end":63,"loc":{"start":{"line":1,"column":0},"end":{"line":5,"column":2}},
"errors": [
"SyntaxError: Missing semicolon (3:9)"
],
"program": {
"type": "Program",
"start":0,"end":63,"loc":{"start":{"line":1,"column":0},"end":{"line":5,"column":2}},
"sourceType": "script",
"interpreter": null,
"body": [
{
"type": "FunctionDeclaration",
"start":0,"end":62,"loc":{"start":{"line":1,"column":0},"end":{"line":5,"column":1}},
"id": {
"type": "Identifier",
"start":16,"end":20,"loc":{"start":{"line":1,"column":16},"end":{"line":1,"column":20},"identifierName":"iter"},
"name": "iter"
},
"generator": true,
"async": true,
"params": [],
"body": {
"type": "BlockStatement",
"start":23,"end":62,"loc":{"start":{"line":1,"column":23},"end":{"line":5,"column":1}},
"body": [
{
"type": "ExpressionStatement",
"start":27,"end":60,"loc":{"start":{"line":2,"column":2},"end":{"line":4,"column":3}},
"expression": {
"type": "AwaitExpression",
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"argument": {
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"async": true,
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"body": [
{
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"expression": {
"type": "Identifier",
"start":48,"end":53,"loc":{"start":{"line":3,"column":4},"end":{"line":3,"column":9},"identifierName":"yield"},
"name": "yield"
}
},
{
"type": "ExpressionStatement",
"start":54,"end":56,"loc":{"start":{"line":3,"column":10},"end":{"line":3,"column":12}},
"expression": {
"type": "NumericLiteral",
"start":54,"end":55,"loc":{"start":{"line":3,"column":10},"end":{"line":3,"column":11}},
"extra": {
"rawValue": 1,
"raw": "1"
},
"value": 1
}
}
],
"directives": []
}
}
}
}
],
"directives": []
}
},
{
"type": "EmptyStatement",
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}
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5
packages/babel-parser/test/fixtures/experimental/async-do-expressions/invalid-return/input.js vendored Normal file
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@ -0,0 +1,5 @@
function iter() {
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68
packages/babel-parser/test/fixtures/experimental/async-do-expressions/invalid-return/output.json vendored Normal file
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@ -0,0 +1,68 @@
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3
packages/babel-parser/test/fixtures/experimental/async-do-expressions/options.json vendored Normal file
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@ -0,0 +1,3 @@
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4
packages/babel-parser/test/fixtures/experimental/async-do-expressions/scoping-variable/input.js vendored Normal file
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@ -0,0 +1,4 @@
let x = async do {
let tmp = f();
tmp * tmp + 1
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100
packages/babel-parser/test/fixtures/experimental/async-do-expressions/scoping-variable/output.json vendored Normal file
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@ -0,0 +1,100 @@
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1
packages/babel-parser/test/fixtures/experimental/do-expressions/conditional-statement/output.json vendored
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@ -22,6 +22,7 @@
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1
packages/babel-parser/test/fixtures/experimental/do-expressions/scoping-variable/output.json vendored
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@ -22,6 +22,7 @@
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11
packages/babel-parser/test/fixtures/experimental/do-expressions/with-jsx/output.json vendored
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@ -28,6 +28,10 @@
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@ -173,11 +178,7 @@
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1
packages/babel-parser/test/fixtures/experimental/pipeline-operator/proposal-smart-error,-topic-style,-unbound-topic,-do-expression,-do-while-loop,-outer-topic-reference-in-loop-body/output.json vendored
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@ -29,6 +29,7 @@
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@ -44,6 +44,7 @@
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1
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@ -29,6 +29,7 @@
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1
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@ -29,6 +29,7 @@
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1
packages/babel-parser/test/fixtures/experimental/pipeline-operator/proposal-smart-error,-topic-style,-unbound-topic,-do-expression,-for-of-loop,-outer-topic-reference-in-loop-body/output.json vendored
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@ -29,6 +29,7 @@
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1
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@ -28,6 +28,7 @@
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1
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@ -29,6 +29,7 @@
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1
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@ -29,6 +29,7 @@
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1
packages/babel-parser/test/fixtures/experimental/pipeline-operator/proposal-smart-topic-style,-do-expression,-do-while-loop,-outer-topic-reference-in-loop-head/output.json vendored
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@ -25,6 +25,7 @@
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1
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@ -40,6 +40,7 @@
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1
packages/babel-parser/test/fixtures/experimental/pipeline-operator/proposal-smart-topic-style,-do-expression,-for-classic-loop,-outer-topic-reference-in-loop-head/output.json vendored
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@ -25,6 +25,7 @@
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1
packages/babel-parser/test/fixtures/experimental/pipeline-operator/proposal-smart-topic-style,-do-expression,-for-in-loop,-outer-topic-reference-in-loop-head/output.json vendored
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@ -25,6 +25,7 @@
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1
packages/babel-parser/test/fixtures/experimental/pipeline-operator/proposal-smart-topic-style,-do-expression,-for-of-loop,-outer-topic-reference-in-loop-head/output.json vendored
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@ -25,6 +25,7 @@
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1
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@ -25,6 +25,7 @@
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1
packages/babel-parser/test/fixtures/experimental/pipeline-operator/proposal-smart-topic-style,-do-expression,-if-statement,-outer-topic-reference-in-else-body/output.json vendored
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@ -25,6 +25,7 @@
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1
packages/babel-parser/test/fixtures/experimental/pipeline-operator/proposal-smart-topic-style,-do-expression,-if-statement,-outer-topic-reference-in-else-if-body/output.json vendored
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@ -25,6 +25,7 @@
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1
packages/babel-parser/test/fixtures/experimental/pipeline-operator/proposal-smart-topic-style,-do-expression,-if-statement,-outer-topic-reference-in-if-body/output.json vendored
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@ -25,6 +25,7 @@
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1
packages/babel-parser/test/fixtures/experimental/pipeline-operator/proposal-smart-topic-style,-do-expression,-if-statement,-outer-topic-reference-in-if-head/output.json vendored
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@ -25,6 +25,7 @@
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1
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@ -25,6 +25,7 @@
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1
packages/babel-parser/test/fixtures/experimental/pipeline-operator/proposal-smart-topic-style,-do-expression,-switch-statement,-outer-topic-reference-in-switch-head/output.json vendored
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@ -25,6 +25,7 @@
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9
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@ -25,6 +25,7 @@
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@ -50,12 +51,12 @@
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@ -95,12 +96,12 @@
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9
packages/babel-parser/test/fixtures/experimental/pipeline-operator/proposal-smart-topic-style,-do-expression,-try-statement,-outer-topic-reference-in-try-clause-with-catch-and-finally/output.json vendored
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@ -25,6 +25,7 @@
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@ -50,12 +51,12 @@
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@ -94,12 +95,12 @@
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9
packages/babel-parser/test/fixtures/experimental/pipeline-operator/proposal-smart-topic-style,-do-expression,-try-statement,-outer-topic-reference-in-try-clause-with-catch/output.json vendored
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@ -25,6 +25,7 @@
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@ -94,12 +95,12 @@
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1
packages/babel-parser/test/fixtures/experimental/pipeline-operator/proposal-smart-topic-style,-do-expression,-while-loop,-outer-topic-reference-in-loop-head/output.json vendored
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@ -25,6 +25,7 @@
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"start":12,"end":37,"loc":{"start":{"line":1,"column":12},"end":{"line":1,"column":37}},

1
packages/babel-parser/typings/babel-parser.d.ts vendored
View File

@ -108,6 +108,7 @@ export interface ParserOptions {
}
export type ParserPlugin =
| "asyncDoExpressions"
| "asyncGenerators"
| "bigInt"
| "classPrivateMethods"

7
packages/babel-plugin-proposal-do-expressions/src/index.js
View File

@ -11,7 +11,12 @@ export default declare(api => {
visitor: {
DoExpression: {
exit(path) {
const body = path.node.body.body;
const { node } = path;
if (node.async) {
// Async do expressions are not yet supported
return;
}
const body = node.body.body;
if (body.length) {
path.replaceExpressionWithStatements(body);
} else {

1
packages/babel-plugin-proposal-do-expressions/test/fixtures/async-do-expressions/basic/input.js vendored Normal file
View File

@ -0,0 +1 @@
(async do {});

1
packages/babel-plugin-proposal-do-expressions/test/fixtures/async-do-expressions/basic/output.js vendored Normal file
View File

@ -0,0 +1 @@
async do {};

3
packages/babel-plugin-proposal-do-expressions/test/fixtures/async-do-expressions/options.json vendored Normal file
View File

@ -0,0 +1,3 @@
{
"plugins": ["syntax-async-do-expressions", "proposal-do-expressions"]
}

3
packages/babel-plugin-syntax-async-do-expressions/.npmignore Normal file
View File

@ -0,0 +1,3 @@
src
test
*.log

19
packages/babel-plugin-syntax-async-do-expressions/README.md Normal file
View File

@ -0,0 +1,19 @@
# @babel/plugin-syntax-async-do-expressions
> Allow parsing of async do expressions
See our website [@babel/plugin-syntax-async-do-expressions](https://babel.dev/docs/en/babel-plugin-syntax-async-do-expressions) for more information.
## Install
Using npm:
```sh
npm install --save-dev @babel/plugin-syntax-async-do-expressions
```
or using yarn:
```sh
yarn add @babel/plugin-syntax-async-do-expressions --dev
```

31
packages/babel-plugin-syntax-async-do-expressions/package.json Normal file
View File

@ -0,0 +1,31 @@
{
"name": "@babel/plugin-syntax-async-do-expressions",
"version": "7.13.0",
"description": "Allow parsing of async do expressions",
"repository": {
"type": "git",
"url": "https://github.com/babel/babel.git",
"directory": "packages/babel-plugin-syntax-async-do-expressions"
},
"license": "MIT",
"publishConfig": {
"access": "public"
},
"main": "./lib/index.js",
"exports": {
".": "./lib/index.js"
},
"keywords": [
"babel-plugin"
],
"dependencies": {
"@babel/helper-plugin-utils": "workspace:^7.12.13"
},
"peerDependencies": {
"@babel/core": "^7.0.0-0"
},
"devDependencies": {
"@babel/core": "workspace:*"
},
"homepage": "https://babel.dev/docs/en/next/babel-plugin-syntax-async-do-expressions"
}

13
packages/babel-plugin-syntax-async-do-expressions/src/index.ts Normal file
View File

@ -0,0 +1,13 @@
import { declare } from "@babel/helper-plugin-utils";
export default declare(api => {
api.assertVersion(7);
return {
name: "syntax-async-do-expressions",
manipulateOptions(opts, parserOpts) {
parserOpts.plugins.push("asyncDoExpressions", "doExpressions");
},
};
});

1
packages/babel-types/src/ast-types/generated/index.ts
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@ -1609,6 +1609,7 @@ export interface Decorator extends BaseNode {
export interface DoExpression extends BaseNode {
type: "DoExpression";
body: BlockStatement;
async: boolean;
}
export interface ExportDefaultSpecifier extends BaseNode {

5
packages/babel-types/src/builders/generated/index.ts
View File

@ -1051,7 +1051,10 @@ export function importAttribute(
export function decorator(expression: t.Expression): t.Decorator {
return builder("Decorator", ...arguments);
}
export function doExpression(body: t.BlockStatement): t.DoExpression {
export function doExpression(
body: t.BlockStatement,
async?: boolean,
): t.DoExpression {
return builder("DoExpression", ...arguments);
}
export function exportDefaultSpecifier(

5
packages/babel-types/src/definitions/experimental.ts
View File

@ -188,11 +188,16 @@ defineType("Decorator", {
defineType("DoExpression", {
visitor: ["body"],
builder: ["body", "async"],
aliases: ["Expression"],
fields: {
body: {
validate: assertNodeType("BlockStatement"),
},
async: {
validate: assertValueType("boolean"),
default: false,
},
},
});

11
yarn.lock
View File

@ -1512,6 +1512,17 @@ __metadata:
languageName: unknown
linkType: soft
"@babel/plugin-syntax-async-do-expressions@workspace:packages/babel-plugin-syntax-async-do-expressions":
version: 0.0.0-use.local
resolution: "@babel/plugin-syntax-async-do-expressions@workspace:packages/babel-plugin-syntax-async-do-expressions"
dependencies:
"@babel/core": "workspace:*"
"@babel/helper-plugin-utils": "workspace:^7.12.13"
peerDependencies:
"@babel/core": ^7.0.0-0
languageName: unknown
linkType: soft
"@babel/plugin-syntax-async-generators@npm:^7.8.4":
version: 7.8.4
resolution: "@babel/plugin-syntax-async-generators@npm:7.8.4"