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Parse class static block (#12079)

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Co-authored-by: Brian Ng <bng412@gmail.com>
This commit is contained in:
Huáng Jùnliàng 2020-10-06 12:42:53 -04:00 committed by Nicolò Ribaudo
parent 6830c90ac9
commit 3ccca88178
66 changed files with 1823 additions and 46 deletions
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15
packages/babel-generator/src/generators/classes.js
View File

@ -134,3 +134,18 @@ export function _classMethodHead(node) {
this.tsPrintClassMemberModifiers(node, /* isField */ false);
this._methodHead(node);
}
export function StaticBlock(node) {
this.word("static");
this.space();
this.token("{");
if (node.body.length === 0) {
this.token("}");
} else {
this.newline();
this.printSequence(node.body, node, {
indent: true,
});
this.rightBrace();
}
}

16
packages/babel-generator/test/fixtures/minified/static-block/input.js vendored Normal file
View File

@ -0,0 +1,16 @@
class Foo {
static {}
}
class A1 {
static{
foo;
}
}
class A2 {
static {
foo;
bar;
}
}

4
packages/babel-generator/test/fixtures/minified/static-block/options.json vendored Normal file
View File

@ -0,0 +1,4 @@
{
"minified": true,
"plugins": ["classStaticBlock"]
}

1
packages/babel-generator/test/fixtures/minified/static-block/output.js vendored Normal file
View File

@ -0,0 +1 @@
class Foo{static{}}class A1{static{foo}}class A2{static{foo;bar}}

15
packages/babel-generator/test/fixtures/types/ClassBody-StaticBlock/input.js vendored Normal file
View File

@ -0,0 +1,15 @@
class Foo {
static {}
}
class A1 {
static{
foo;
}
}
class A2 {
static {
foo;bar;
}
}

1
packages/babel-generator/test/fixtures/types/ClassBody-StaticBlock/options.json vendored Normal file
View File

@ -0,0 +1 @@
{ "plugins": ["classStaticBlock"] }

16
packages/babel-generator/test/fixtures/types/ClassBody-StaticBlock/output.js vendored Normal file
View File

@ -0,0 +1,16 @@
class Foo {
static {}
}
class A1 {
static {
foo;
}
}
class A2 {
static {
foo;
bar;
}
}

13
packages/babel-parser/ast/spec.md
View File

@ -1183,7 +1183,7 @@ interface Class <: Node {
```js
interface ClassBody <: Node {
type: "ClassBody";
body: [ ClassMethod | ClassPrivateMethod | ClassProperty | ClassPrivateProperty ];
body: [ ClassMethod | ClassPrivateMethod | ClassProperty | ClassPrivateProperty | StaticBlock ];
}
```
@ -1235,6 +1235,17 @@ interface ClassPrivateProperty <: Node {
}
```
## StaticBlock
```js
interface StaticBlock <: Node {
type: "StaticBlock";
body: [ Statement ];
}
```
A static block proposed in https://github.com/tc39/proposal-class-static-block.
## ClassDeclaration
```js

6
packages/babel-parser/src/parser/error-message.js
View File

@ -4,8 +4,8 @@
// The Errors key follows https://cs.chromium.org/chromium/src/v8/src/common/message-template.h unless it does not exist
export const ErrorMessages = Object.freeze({
AccessorIsGenerator: "A %0ter cannot be a generator",
ArgumentsDisallowedInInitializer:
"'arguments' is not allowed in class field initializer",
ArgumentsInClass:
"'arguments' is only allowed in functions and class methods",
AsyncFunctionInSingleStatementContext:
"Async functions can only be declared at the top level or inside a block",
AwaitBindingIdentifier:
@ -32,6 +32,7 @@ export const ErrorMessages = Object.freeze({
DecoratorExportClass:
"Using the export keyword between a decorator and a class is not allowed. Please use `export @dec class` instead.",
DecoratorSemicolon: "Decorators must not be followed by a semicolon",
DecoratorStaticBlock: "Decorators can't be used with a static block",
DeletePrivateField: "Deleting a private field is not allowed",
DestructureNamedImport:
"ES2015 named imports do not destructure. Use another statement for destructuring after the import.",
@ -41,6 +42,7 @@ export const ErrorMessages = Object.freeze({
"`%0` has already been exported. Exported identifiers must be unique.",
DuplicateProto: "Redefinition of __proto__ property",
DuplicateRegExpFlags: "Duplicate regular expression flag",
DuplicateStaticBlock: "Duplicate static block in the same class",
ElementAfterRest: "Rest element must be last element",
EscapedCharNotAnIdentifier: "Invalid Unicode escape",
ExportBindingIsString:

2
packages/babel-parser/src/parser/expression.js
View File

@ -2390,7 +2390,7 @@ export default class ExpressionParser extends LValParser {
!this.scope.inNonArrowFunction &&
word === "arguments"
) {
this.raise(startLoc, Errors.ArgumentsDisallowedInInitializer);
this.raise(startLoc, Errors.ArgumentsInClass);
return;
}
if (checkKeywords && isKeyword(word)) {

63
packages/babel-parser/src/parser/statement.js
View File

@ -797,7 +797,7 @@ export default class StatementParser extends ExpressionParser {
}
// Parse a semicolon-enclosed block of statements, handling `"use
// strict"` declarations when `allowStrict` is true (used for
// strict"` declarations when `allowDirectives` is true (used for
// function bodies).
parseBlock(
@ -1207,7 +1207,11 @@ export default class StatementParser extends ExpressionParser {
): N.ClassBody {
this.classScope.enter();
const state = { hadConstructor: false };
const state: N.ParseClassMemberState = {
constructorAllowsSuper,
hadConstructor: false,
hadStaticBlock: false,
};
let decorators: N.Decorator[] = [];
const classBody: N.ClassBody = this.startNode();
classBody.body = [];
@ -1239,7 +1243,7 @@ export default class StatementParser extends ExpressionParser {
decorators = [];
}
this.parseClassMember(classBody, member, state, constructorAllowsSuper);
this.parseClassMember(classBody, member, state);
if (
member.kind === "constructor" &&
@ -1305,31 +1309,33 @@ export default class StatementParser extends ExpressionParser {
parseClassMember(
classBody: N.ClassBody,
member: N.ClassMember,
state: { hadConstructor: boolean },
constructorAllowsSuper: boolean,
state: N.ParseClassMemberState,
): void {
const isStatic = this.isContextual("static");
if (isStatic && this.parseClassMemberFromModifier(classBody, member)) {
if (isStatic) {
if (this.parseClassMemberFromModifier(classBody, member)) {
// a class element named 'static'
return;
}
this.parseClassMemberWithIsStatic(
if (this.eat(tt.braceL)) {
this.parseClassStaticBlock(
classBody,
member,
((member: any): N.StaticBlock),
state,
isStatic,
constructorAllowsSuper,
);
return;
}
}
this.parseClassMemberWithIsStatic(classBody, member, state, isStatic);
}
parseClassMemberWithIsStatic(
classBody: N.ClassBody,
member: N.ClassMember,
state: { hadConstructor: boolean },
state: N.ParseClassMemberState,
isStatic: boolean,
constructorAllowsSuper: boolean,
) {
const publicMethod: $FlowSubtype<N.ClassMethod> = member;
const privateMethod: $FlowSubtype<N.ClassPrivateMethod> = member;
@ -1396,7 +1402,7 @@ export default class StatementParser extends ExpressionParser {
this.raise(key.start, Errors.DuplicateConstructor);
}
state.hadConstructor = true;
allowsDirectSuper = constructorAllowsSuper;
allowsDirectSuper = state.constructorAllowsSuper;
}
this.pushClassMethod(
@ -1515,6 +1521,35 @@ export default class StatementParser extends ExpressionParser {
return key;
}
parseClassStaticBlock(
classBody: N.ClassBody,
member: N.StaticBlock & { decorators?: Array<N.Decorator> },
state: N.ParseClassMemberState,
) {
this.expectPlugin("classStaticBlock", member.start);
// Start a new lexical scope
this.scope.enter(SCOPE_CLASS | SCOPE_SUPER);
// Start a new scope with regard to loop labels
const oldLabels = this.state.labels;
this.state.labels = [];
// ClassStaticBlockStatementList:
// StatementList[~Yield, ~Await, ~Return] opt
this.prodParam.enter(PARAM);
const body = (member.body = []);
this.parseBlockOrModuleBlockBody(body, undefined, false, tt.braceR);
this.prodParam.exit();
this.scope.exit();
this.state.labels = oldLabels;
classBody.body.push(this.finishNode<N.StaticBlock>(member, "StaticBlock"));
if (state.hadStaticBlock) {
this.raise(member.start, Errors.DuplicateStaticBlock);
}
if (member.decorators?.length) {
this.raise(member.start, Errors.DecoratorStaticBlock);
}
state.hadStaticBlock = true;
}
pushClassProperty(classBody: N.ClassBody, prop: N.ClassProperty) {
if (
!prop.computed &&

5
packages/babel-parser/src/plugins/flow.js
View File

@ -2096,8 +2096,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
parseClassMember(
classBody: N.ClassBody,
member: any,
state: { hadConstructor: boolean },
constructorAllowsSuper: boolean,
state: N.ParseClassMemberState,
): void {
const pos = this.state.start;
if (this.isContextual("declare")) {
@ -2109,7 +2108,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
member.declare = true;
}
super.parseClassMember(classBody, member, state, constructorAllowsSuper);
super.parseClassMember(classBody, member, state);
if (member.declare) {
if (

21
packages/babel-parser/src/plugins/typescript/index.js
View File

@ -2102,8 +2102,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
parseClassMember(
classBody: N.ClassBody,
member: any,
state: { hadConstructor: boolean },
constructorAllowsSuper: boolean,
state: N.ParseClassMemberState,
): void {
this.tsParseModifiers(member, ["declare"]);
const accessibility = this.parseAccessModifier();
@ -2111,12 +2110,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
this.tsParseModifiers(member, ["declare"]);
const callParseClassMember = () => {
super.parseClassMember(
classBody,
member,
state,
constructorAllowsSuper,
);
super.parseClassMember(classBody, member, state);
};
if (member.declare) {
this.tsInDeclareContext(callParseClassMember);
@ -2128,9 +2122,8 @@ export default (superClass: Class<Parser>): Class<Parser> =>
parseClassMemberWithIsStatic(
classBody: N.ClassBody,
member: N.ClassMember | N.TsIndexSignature,
state: { hadConstructor: boolean },
state: N.ParseClassMemberState,
isStatic: boolean,
constructorAllowsSuper: boolean,
): void {
this.tsParseModifiers(member, ["abstract", "readonly", "declare"]);
@ -2160,13 +2153,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
/*:: invariant(member.type !== "TSIndexSignature") */
super.parseClassMemberWithIsStatic(
classBody,
member,
state,
isStatic,
constructorAllowsSuper,
);
super.parseClassMemberWithIsStatic(classBody, member, state, isStatic);
}
parsePostMemberNameModifiers(

13
packages/babel-parser/src/types.js
View File

@ -705,7 +705,7 @@ export type ClassBase = HasDecorators & {
export type ClassBody = NodeBase & {
type: "ClassBody",
body: Array<ClassMember | TsIndexSignature>, // TODO: $ReadOnlyArray
body: Array<ClassMember | StaticBlock | TsIndexSignature>, // TODO: $ReadOnlyArray
};
// | Placeholder<"ClassBody">;
@ -719,6 +719,11 @@ export type ClassMemberBase = NodeBase &
optional?: ?true,
};
export type StaticBlock = NodeBase & {
type: "StaticBlock",
body: Array<Statement>,
};
export type ClassMember =
| ClassMethod
| ClassPrivateMethod
@ -1489,3 +1494,9 @@ export type ParseSubscriptState = {
maybeAsyncArrow: boolean,
stop: boolean,
};
export type ParseClassMemberState = {|
hadConstructor: boolean,
hadStaticBlock: boolean,
constructorAllowsSuper: boolean,
|};

6
packages/babel-parser/test/fixtures/experimental/_no-plugin/class-static-block/input.js vendored Normal file
View File

@ -0,0 +1,6 @@
class C {
static foo() {}
static {
this.bar = this.foo;
}
}

3
packages/babel-parser/test/fixtures/experimental/_no-plugin/class-static-block/options.json vendored Normal file
View File

@ -0,0 +1,3 @@
{
"throws": "This experimental syntax requires enabling the parser plugin: 'classStaticBlock' (3:2)"
}

2
packages/babel-parser/test/fixtures/experimental/class-properties/arguments-in-arrow-function/output.json vendored
View File

@ -2,7 +2,7 @@
"type": "File",
"start":0,"end":60,"loc":{"start":{"line":1,"column":0},"end":{"line":5,"column":1}},
"errors": [
"SyntaxError: 'arguments' is not allowed in class field initializer (3:16)"
"SyntaxError: 'arguments' is only allowed in functions and class methods (3:16)"
],
"program": {
"type": "Program",

2
packages/babel-parser/test/fixtures/experimental/class-properties/arguments-in-nested-class-decorator-call-expression/output.json vendored
View File

@ -2,7 +2,7 @@
"type": "File",
"start":0,"end":76,"loc":{"start":{"line":1,"column":0},"end":{"line":5,"column":1}},
"errors": [
"SyntaxError: 'arguments' is not allowed in class field initializer (3:25)"
"SyntaxError: 'arguments' is only allowed in functions and class methods (3:25)"
],
"program": {
"type": "Program",

2
packages/babel-parser/test/fixtures/experimental/class-properties/arguments/output.json vendored
View File

@ -2,7 +2,7 @@
"type": "File",
"start":0,"end":54,"loc":{"start":{"line":1,"column":0},"end":{"line":5,"column":1}},
"errors": [
"SyntaxError: 'arguments' is not allowed in class field initializer (3:10)"
"SyntaxError: 'arguments' is only allowed in functions and class methods (3:10)"
],
"program": {
"type": "Program",

6
packages/babel-parser/test/fixtures/experimental/class-static-block/basic/input.js vendored Normal file
View File

@ -0,0 +1,6 @@
class C {
static foo() {}
static {
this.bar = this.foo;
}
}

94
packages/babel-parser/test/fixtures/experimental/class-static-block/basic/output.json vendored Normal file
View File

@ -0,0 +1,94 @@
{
"type": "File",
"start":0,"end":69,"loc":{"start":{"line":1,"column":0},"end":{"line":6,"column":1}},
"program": {
"type": "Program",
"start":0,"end":69,"loc":{"start":{"line":1,"column":0},"end":{"line":6,"column":1}},
"sourceType": "script",
"interpreter": null,
"body": [
{
"type": "ClassDeclaration",
"start":0,"end":69,"loc":{"start":{"line":1,"column":0},"end":{"line":6,"column":1}},
"id": {
"type": "Identifier",
"start":6,"end":7,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":7},"identifierName":"C"},
"name": "C"
},
"superClass": null,
"body": {
"type": "ClassBody",
"start":8,"end":69,"loc":{"start":{"line":1,"column":8},"end":{"line":6,"column":1}},
"body": [
{
"type": "ClassMethod",
"start":12,"end":27,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":17}},
"static": true,
"key": {
"type": "Identifier",
"start":19,"end":22,"loc":{"start":{"line":2,"column":9},"end":{"line":2,"column":12},"identifierName":"foo"},
"name": "foo"
},
"computed": false,
"kind": "method",
"id": null,
"generator": false,
"async": false,
"params": [],
"body": {
"type": "BlockStatement",
"start":25,"end":27,"loc":{"start":{"line":2,"column":15},"end":{"line":2,"column":17}},
"body": [],
"directives": []
}
},
{
"type": "StaticBlock",
"start":30,"end":67,"loc":{"start":{"line":3,"column":2},"end":{"line":5,"column":3}},
"body": [
{
"type": "ExpressionStatement",
"start":43,"end":63,"loc":{"start":{"line":4,"column":4},"end":{"line":4,"column":24}},
"expression": {
"type": "AssignmentExpression",
"start":43,"end":62,"loc":{"start":{"line":4,"column":4},"end":{"line":4,"column":23}},
"operator": "=",
"left": {
"type": "MemberExpression",
"start":43,"end":51,"loc":{"start":{"line":4,"column":4},"end":{"line":4,"column":12}},
"object": {
"type": "ThisExpression",
"start":43,"end":47,"loc":{"start":{"line":4,"column":4},"end":{"line":4,"column":8}}
},
"computed": false,
"property": {
"type": "Identifier",
"start":48,"end":51,"loc":{"start":{"line":4,"column":9},"end":{"line":4,"column":12},"identifierName":"bar"},
"name": "bar"
}
},
"right": {
"type": "MemberExpression",
"start":54,"end":62,"loc":{"start":{"line":4,"column":15},"end":{"line":4,"column":23}},
"object": {
"type": "ThisExpression",
"start":54,"end":58,"loc":{"start":{"line":4,"column":15},"end":{"line":4,"column":19}}
},
"computed": false,
"property": {
"type": "Identifier",
"start":59,"end":62,"loc":{"start":{"line":4,"column":20},"end":{"line":4,"column":23},"identifierName":"foo"},
"name": "foo"
}
}
}
}
]
}
]
}
}
],
"directives": []
}
}

7
packages/babel-parser/test/fixtures/experimental/class-static-block/directive-like-literal/input.js vendored Normal file
View File

@ -0,0 +1,7 @@
class C {
static foo() {}
static {
"use strict"; // will not be parsed as directives
this.bar = this.foo;
}
}

128
packages/babel-parser/test/fixtures/experimental/class-static-block/directive-like-literal/output.json vendored Normal file
View File

@ -0,0 +1,128 @@
{
"type": "File",
"start":0,"end":123,"loc":{"start":{"line":1,"column":0},"end":{"line":7,"column":1}},
"program": {
"type": "Program",
"start":0,"end":123,"loc":{"start":{"line":1,"column":0},"end":{"line":7,"column":1}},
"sourceType": "script",
"interpreter": null,
"body": [
{
"type": "ClassDeclaration",
"start":0,"end":123,"loc":{"start":{"line":1,"column":0},"end":{"line":7,"column":1}},
"id": {
"type": "Identifier",
"start":6,"end":7,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":7},"identifierName":"C"},
"name": "C"
},
"superClass": null,
"body": {
"type": "ClassBody",
"start":8,"end":123,"loc":{"start":{"line":1,"column":8},"end":{"line":7,"column":1}},
"body": [
{
"type": "ClassMethod",
"start":12,"end":27,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":17}},
"static": true,
"key": {
"type": "Identifier",
"start":19,"end":22,"loc":{"start":{"line":2,"column":9},"end":{"line":2,"column":12},"identifierName":"foo"},
"name": "foo"
},
"computed": false,
"kind": "method",
"id": null,
"generator": false,
"async": false,
"params": [],
"body": {
"type": "BlockStatement",
"start":25,"end":27,"loc":{"start":{"line":2,"column":15},"end":{"line":2,"column":17}},
"body": [],
"directives": []
}
},
{
"type": "StaticBlock",
"start":30,"end":121,"loc":{"start":{"line":3,"column":2},"end":{"line":6,"column":3}},
"body": [
{
"type": "ExpressionStatement",
"start":43,"end":56,"loc":{"start":{"line":4,"column":4},"end":{"line":4,"column":17}},
"trailingComments": [
{
"type": "CommentLine",
"value": " will not be parsed as directives",
"start":57,"end":92,"loc":{"start":{"line":4,"column":18},"end":{"line":4,"column":53}}
}
],
"expression": {
"type": "StringLiteral",
"start":43,"end":55,"loc":{"start":{"line":4,"column":4},"end":{"line":4,"column":16}},
"extra": {
"rawValue": "use strict",
"raw": "\"use strict\""
},
"value": "use strict"
}
},
{
"type": "ExpressionStatement",
"start":97,"end":117,"loc":{"start":{"line":5,"column":4},"end":{"line":5,"column":24}},
"leadingComments": [
{
"type": "CommentLine",
"value": " will not be parsed as directives",
"start":57,"end":92,"loc":{"start":{"line":4,"column":18},"end":{"line":4,"column":53}}
}
],
"expression": {
"type": "AssignmentExpression",
"start":97,"end":116,"loc":{"start":{"line":5,"column":4},"end":{"line":5,"column":23}},
"operator": "=",
"left": {
"type": "MemberExpression",
"start":97,"end":105,"loc":{"start":{"line":5,"column":4},"end":{"line":5,"column":12}},
"object": {
"type": "ThisExpression",
"start":97,"end":101,"loc":{"start":{"line":5,"column":4},"end":{"line":5,"column":8}}
},
"computed": false,
"property": {
"type": "Identifier",
"start":102,"end":105,"loc":{"start":{"line":5,"column":9},"end":{"line":5,"column":12},"identifierName":"bar"},
"name": "bar"
}
},
"right": {
"type": "MemberExpression",
"start":108,"end":116,"loc":{"start":{"line":5,"column":15},"end":{"line":5,"column":23}},
"object": {
"type": "ThisExpression",
"start":108,"end":112,"loc":{"start":{"line":5,"column":15},"end":{"line":5,"column":19}}
},
"computed": false,
"property": {
"type": "Identifier",
"start":113,"end":116,"loc":{"start":{"line":5,"column":20},"end":{"line":5,"column":23},"identifierName":"foo"},
"name": "foo"
}
}
}
}
]
}
]
}
}
],
"directives": []
},
"comments": [
{
"type": "CommentLine",
"value": " will not be parsed as directives",
"start":57,"end":92,"loc":{"start":{"line":4,"column":18},"end":{"line":4,"column":53}}
}
]
}

4
packages/babel-parser/test/fixtures/experimental/class-static-block/empty-statement/input.js vendored Normal file
View File

@ -0,0 +1,4 @@
class C {
static foo() {}
static {}
}

56
packages/babel-parser/test/fixtures/experimental/class-static-block/empty-statement/output.json vendored Normal file
View File

@ -0,0 +1,56 @@
{
"type": "File",
"start":0,"end":41,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":1}},
"program": {
"type": "Program",
"start":0,"end":41,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":1}},
"sourceType": "script",
"interpreter": null,
"body": [
{
"type": "ClassDeclaration",
"start":0,"end":41,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":1}},
"id": {
"type": "Identifier",
"start":6,"end":7,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":7},"identifierName":"C"},
"name": "C"
},
"superClass": null,
"body": {
"type": "ClassBody",
"start":8,"end":41,"loc":{"start":{"line":1,"column":8},"end":{"line":4,"column":1}},
"body": [
{
"type": "ClassMethod",
"start":12,"end":27,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":17}},
"static": true,
"key": {
"type": "Identifier",
"start":19,"end":22,"loc":{"start":{"line":2,"column":9},"end":{"line":2,"column":12},"identifierName":"foo"},
"name": "foo"
},
"computed": false,
"kind": "method",
"id": null,
"generator": false,
"async": false,
"params": [],
"body": {
"type": "BlockStatement",
"start":25,"end":27,"loc":{"start":{"line":2,"column":15},"end":{"line":2,"column":17}},
"body": [],
"directives": []
}
},
{
"type": "StaticBlock",
"start":30,"end":39,"loc":{"start":{"line":3,"column":2},"end":{"line":3,"column":11}},
"body": []
}
]
}
}
],
"directives": []
}
}

5
packages/babel-parser/test/fixtures/experimental/class-static-block/invalid-arguments/input.js vendored Normal file
View File

@ -0,0 +1,5 @@
class C {
static {
this.foo = arguments;
}
}

66
packages/babel-parser/test/fixtures/experimental/class-static-block/invalid-arguments/output.json vendored Normal file
View File

@ -0,0 +1,66 @@
{
"type": "File",
"start":0,"end":52,"loc":{"start":{"line":1,"column":0},"end":{"line":5,"column":1}},
"errors": [
"SyntaxError: 'arguments' is only allowed in functions and class methods (3:15)"
],
"program": {
"type": "Program",
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6
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10
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94
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85
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6
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5
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64
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7
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108
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73
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6
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68
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}
}
],
"directives": []
}
}

7
packages/babel-parser/test/fixtures/experimental/class-static-block/invalid-super-call/input.js vendored Normal file
View File

@ -0,0 +1,7 @@
class B {}
class C extends B {
static foo() {}
static {
super();
}
}

92
packages/babel-parser/test/fixtures/experimental/class-static-block/invalid-super-call/output.json vendored Normal file
View File

@ -0,0 +1,92 @@
{
"type": "File",
"start":0,"end":78,"loc":{"start":{"line":1,"column":0},"end":{"line":7,"column":1}},
"errors": [
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],
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}
]
}
]
}
}
],
"directives": []
}
}

8
packages/babel-parser/test/fixtures/experimental/class-static-block/invalid-yield/input.js vendored Normal file
View File

@ -0,0 +1,8 @@
function* foo() {
class C {
static foo() {}
static {
yield 42;
}
}
}

6
packages/babel-parser/test/fixtures/experimental/class-static-block/invalid-yield/options.json vendored Normal file
View File

@ -0,0 +1,6 @@
{
"plugins": [
"classStaticBlock"
],
"throws": "Unexpected token, expected \";\" (5:12)"
}

6
packages/babel-parser/test/fixtures/experimental/class-static-block/lexical-scope/input.js vendored Normal file
View File

@ -0,0 +1,6 @@
class C {
static foo() {}
static {
const C = {};
}
}

78
packages/babel-parser/test/fixtures/experimental/class-static-block/lexical-scope/output.json vendored Normal file
View File

@ -0,0 +1,78 @@
{
"type": "File",
"start":0,"end":62,"loc":{"start":{"line":1,"column":0},"end":{"line":6,"column":1}},
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{
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}
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{
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"id": {
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"name": "C"
},
"init": {
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"start":53,"end":55,"loc":{"start":{"line":4,"column":14},"end":{"line":4,"column":16}},
"properties": []
}
}
],
"kind": "const"
}
]
}
]
}
}
],
"directives": []
}
}

17
packages/babel-parser/test/fixtures/experimental/class-static-block/nested-control-flow/input.js vendored Normal file
View File

@ -0,0 +1,17 @@
class C {
static foo() {}
static {
while (this.foo) {
if (this.foo) {
break;
} else {
continue;
}
}
class C2 {
bar() {
return;
}
}
}
}

168
packages/babel-parser/test/fixtures/experimental/class-static-block/nested-control-flow/output.json vendored Normal file
View File

@ -0,0 +1,168 @@
{
"type": "File",
"start":0,"end":210,"loc":{"start":{"line":1,"column":0},"end":{"line":17,"column":1}},
"program": {
"type": "Program",
"start":0,"end":210,"loc":{"start":{"line":1,"column":0},"end":{"line":17,"column":1}},
"sourceType": "script",
"interpreter": null,
"body": [
{
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"id": {
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"name": "C"
},
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"body": [
{
"type": "ClassMethod",
"start":12,"end":27,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":17}},
"static": true,
"key": {
"type": "Identifier",
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"name": "foo"
},
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"body": [],
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}
},
{
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"body": [
{
"type": "WhileStatement",
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"test": {
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"object": {
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},
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}
},
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}
],
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},
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"body": [
{
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"label": null
}
],
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}
}
],
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}
},
{
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"id": {
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"static": false,
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]
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}
],
"directives": []
}
}

3
packages/babel-parser/test/fixtures/experimental/class-static-block/options.json vendored Normal file
View File

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

8
packages/babel-parser/test/fixtures/experimental/class-static-block/super-property/input.js vendored Normal file
View File

@ -0,0 +1,8 @@
class B {
static foo() {}
}
class C extends B {
static {
this.bar = super.foo;
}
}

114
packages/babel-parser/test/fixtures/experimental/class-static-block/super-property/output.json vendored Normal file
View File

@ -0,0 +1,114 @@
{
"type": "File",
"start":0,"end":92,"loc":{"start":{"line":1,"column":0},"end":{"line":8,"column":1}},
"program": {
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{
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},
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},
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{
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{
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"expression": {
"type": "AssignmentExpression",
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"operator": "=",
"left": {
"type": "MemberExpression",
"start":65,"end":73,"loc":{"start":{"line":6,"column":4},"end":{"line":6,"column":12}},
"object": {
"type": "ThisExpression",
"start":65,"end":69,"loc":{"start":{"line":6,"column":4},"end":{"line":6,"column":8}}
},
"computed": false,
"property": {
"type": "Identifier",
"start":70,"end":73,"loc":{"start":{"line":6,"column":9},"end":{"line":6,"column":12},"identifierName":"bar"},
"name": "bar"
}
},
"right": {
"type": "MemberExpression",
"start":76,"end":85,"loc":{"start":{"line":6,"column":15},"end":{"line":6,"column":24}},
"object": {
"type": "Super",
"start":76,"end":81,"loc":{"start":{"line":6,"column":15},"end":{"line":6,"column":20}}
},
"computed": false,
"property": {
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"name": "foo"
}
}
}
}
]
}
]
}
}
],
"directives": []
}
}

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

@ -100,6 +100,7 @@ export type ParserPlugin =
'classPrivateMethods' |
'classPrivateProperties' |
'classProperties' |
'classStaticBlock' |
'decimal' |
'decorators' |
'decorators-legacy' |

3
packages/babel-plugin-syntax-class-static-block/.npmignore Normal file
View File

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

19
packages/babel-plugin-syntax-class-static-block/README.md Normal file
View File

@ -0,0 +1,19 @@
# @babel/plugin-syntax-class-static-block
> Allow parsing of class static blocks
See our website [@babel/plugin-syntax-class-static-block](https://babeljs.io/docs/en/next/babel-plugin-syntax-class-static-block.html) for more information.
## Install
Using npm:
```sh
npm install --save-dev @babel/plugin-syntax-class-static-block
```
or using yarn:
```sh
yarn add @babel/plugin-syntax-class-static-block --dev
```

27
packages/babel-plugin-syntax-class-static-block/package.json Normal file
View File

@ -0,0 +1,27 @@
{
"name": "@babel/plugin-syntax-class-static-block",
"version": "7.11.0",
"description": "Allow parsing of class static blocks",
"repository": {
"type": "git",
"url": "https://github.com/babel/babel.git",
"directory": "packages/babel-plugin-syntax-class-static-block"
},
"license": "MIT",
"publishConfig": {
"access": "public"
},
"main": "./lib/index.js",
"exports": {
".": "./lib/index.js"
},
"keywords": [
"babel-plugin"
],
"dependencies": {
"@babel/helper-plugin-utils": "workspace:^7.10.1"
},
"peerDependencies": {
"@babel/core": "^7.0.0-0"
}
}

13
packages/babel-plugin-syntax-class-static-block/src/index.js 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-class-static-block",
manipulateOptions(opts, parserOpts) {
parserOpts.plugins.push("classStaticBlock");
},
};
});

3
packages/babel-types/src/asserts/generated/index.js
View File

@ -803,6 +803,9 @@ export function assertTupleExpression(node: Object, opts?: Object = {}): void {
export function assertDecimalLiteral(node: Object, opts?: Object = {}): void {
assert("DecimalLiteral", node, opts);
}
export function assertStaticBlock(node: Object, opts?: Object = {}): void {
assert("StaticBlock", node, opts);
}
export function assertTSParameterProperty(
node: Object,
opts?: Object = {},

4
packages/babel-types/src/builders/generated/index.js
View File

@ -734,6 +734,10 @@ export function decimalLiteral(...args: Array<any>): Object {
return builder("DecimalLiteral", ...args);
}
export { decimalLiteral as DecimalLiteral };
export function staticBlock(...args: Array<any>): Object {
return builder("StaticBlock", ...args);
}
export { staticBlock as StaticBlock };
export function tsParameterProperty(...args: Array<any>): Object {
return builder("TSParameterProperty", ...args);
}

14
packages/babel-types/src/definitions/experimental.js
View File

@ -245,3 +245,17 @@ defineType("DecimalLiteral", {
},
aliases: ["Expression", "Pureish", "Literal", "Immutable"],
});
// https://github.com/tc39/proposal-class-static-block
defineType("StaticBlock", {
visitor: ["body"],
fields: {
body: {
validate: chain(
assertValueType("array"),
assertEach(assertNodeType("Statement")),
),
},
},
aliases: ["Scopable", "BlockParent"],
});

16
packages/babel-types/src/validators/generated/index.js
View File

@ -2587,6 +2587,20 @@ export function isDecimalLiteral(node: ?Object, opts?: Object): boolean {
return false;
}
export function isStaticBlock(node: ?Object, opts?: Object): boolean {
if (!node) return false;
const nodeType = node.type;
if (nodeType === "StaticBlock") {
if (typeof opts === "undefined") {
return true;
} else {
return shallowEqual(node, opts);
}
}
return false;
}
export function isTSParameterProperty(node: ?Object, opts?: Object): boolean {
if (!node) return false;
@ -3605,6 +3619,7 @@ export function isScopable(node: ?Object, opts?: Object): boolean {
"ForOfStatement" === nodeType ||
"ClassMethod" === nodeType ||
"ClassPrivateMethod" === nodeType ||
"StaticBlock" === nodeType ||
"TSModuleBlock" === nodeType ||
(nodeType === "Placeholder" && "BlockStatement" === node.expectedNode)
) {
@ -3638,6 +3653,7 @@ export function isBlockParent(node: ?Object, opts?: Object): boolean {
"ForOfStatement" === nodeType ||
"ClassMethod" === nodeType ||
"ClassPrivateMethod" === nodeType ||
"StaticBlock" === nodeType ||
"TSModuleBlock" === nodeType ||
(nodeType === "Placeholder" && "BlockStatement" === node.expectedNode)
) {

10
yarn.lock
View File

@ -1432,6 +1432,16 @@ __metadata:
languageName: unknown
linkType: soft
"@babel/plugin-syntax-class-static-block@workspace:packages/babel-plugin-syntax-class-static-block":
version: 0.0.0-use.local
resolution: "@babel/plugin-syntax-class-static-block@workspace:packages/babel-plugin-syntax-class-static-block"
dependencies:
"@babel/helper-plugin-utils": "workspace:^7.10.1"
peerDependencies:
"@babel/core": ^7.0.0-0
languageName: unknown
linkType: soft
"@babel/plugin-syntax-decimal@workspace:^7.11.0, @babel/plugin-syntax-decimal@workspace:packages/babel-plugin-syntax-decimal":
version: 0.0.0-use.local
resolution: "@babel/plugin-syntax-decimal@workspace:packages/babel-plugin-syntax-decimal"