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refactor: add isLiteralPropertyName to parser utils #11547

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merged 5 commits into from May 14, 2020
Merged

refactor: add isLiteralPropertyName to parser utils #11547

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2a9b5d2
refactor: add isLiteralPropertyName to parser utils
JLHwung May 10, 2020
371f4d6
address review comments [skip-ci]
JLHwung May 12, 2020
6686faa
refactor: keyword is valid identifierName
JLHwung May 12, 2020
98df348
fix: allow bigint in TSLiteralType
JLHwung May 13, 2020
f36586e
update typescript test whitelist
JLHwung May 13, 2020
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12 changes: 3 additions & 9 deletions packages/babel-parser/src/parser/expression.js
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Expand Up @@ -1553,11 +1553,8 @@ export default class ExpressionParser extends LValParser {
!prop.computed &&
prop.key.type === "Identifier" &&
prop.key.name === "async" &&
(this.match(tt.name) ||
this.match(tt.num) ||
this.match(tt.string) ||
(this.isLiteralPropertyName() ||
this.match(tt.bracketL) ||
this.state.type.keyword ||
this.match(tt.star)) &&
!this.hasPrecedingLineBreak()
);
Expand Down Expand Up @@ -1646,11 +1643,8 @@ export default class ExpressionParser extends LValParser {
!prop.computed &&
prop.key.type === "Identifier" &&
(prop.key.name === "get" || prop.key.name === "set") &&
(this.match(tt.string) || // get "string"() {}
this.match(tt.num) || // get 1() {}
this.match(tt.bracketL) || // get ["string"]() {}
this.match(tt.name) || // get foo() {}
!!this.state.type.keyword) // get debugger() {}
(this.isLiteralPropertyName() || // get foo() {}
this.match(tt.bracketL)) // get ["string"]() {}
);
}

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19 changes: 19 additions & 0 deletions packages/babel-parser/src/parser/util.js
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Expand Up @@ -259,6 +259,25 @@ export default class UtilParser extends Tokenizer {
this.raise(doubleProto, Errors.DuplicateProto);
}
}

/**
* Test if current token is a literal property name
* https://tc39.es/ecma262/#prod-LiteralPropertyName
* LiteralPropertyName:
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* IdentifierName
* StringLiteral
* NumericLiteral
* BigIntLiteral
*/
isLiteralPropertyName(): boolean {
return (
this.match(tt.name) ||
!!this.state.type.keyword ||
this.match(tt.string) ||
this.match(tt.num) ||
this.match(tt.bigint)
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);
}
}

/**
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2 changes: 1 addition & 1 deletion packages/babel-parser/test/fixtures/es2020/bigint/decimal-as-property-name/input.js
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@@ -1 +1 @@
({ 0n: 0 });
({ 0n: 0, 1n() {}, get 2n(){}, set 3n(_){}, async 4n() {}, *5n() {} });
144 changes: 140 additions & 4 deletions packages/babel-parser/test/fixtures/es2020/bigint/decimal-as-property-name/output.json
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@@ -1,18 +1,18 @@
{
"type": "File",
"start":0,"end":12,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":12}},
"start":0,"end":71,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":71}},
"program": {
"type": "Program",
"start":0,"end":12,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":12}},
"start":0,"end":71,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":71}},
"sourceType": "script",
"interpreter": null,
"body": [
{
"type": "ExpressionStatement",
"start":0,"end":12,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":12}},
"start":0,"end":71,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":71}},
"expression": {
"type": "ObjectExpression",
"start":1,"end":10,"loc":{"start":{"line":1,"column":1},"end":{"line":1,"column":10}},
"start":1,"end":69,"loc":{"start":{"line":1,"column":1},"end":{"line":1,"column":69}},
"properties": [
{
"type": "ObjectProperty",
Expand All @@ -38,6 +38,142 @@
},
"value": 0
}
},
{
"type": "ObjectMethod",
"start":10,"end":17,"loc":{"start":{"line":1,"column":10},"end":{"line":1,"column":17}},
"method": true,
"key": {
"type": "BigIntLiteral",
"start":10,"end":12,"loc":{"start":{"line":1,"column":10},"end":{"line":1,"column":12}},
"extra": {
"rawValue": "1",
"raw": "1n"
},
"value": "1"
},
"computed": false,
"kind": "method",
"id": null,
"generator": false,
"async": false,
"params": [],
"body": {
"type": "BlockStatement",
"start":15,"end":17,"loc":{"start":{"line":1,"column":15},"end":{"line":1,"column":17}},
"body": [],
"directives": []
}
},
{
"type": "ObjectMethod",
"start":19,"end":29,"loc":{"start":{"line":1,"column":19},"end":{"line":1,"column":29}},
"method": false,
"key": {
"type": "BigIntLiteral",
"start":23,"end":25,"loc":{"start":{"line":1,"column":23},"end":{"line":1,"column":25}},
"extra": {
"rawValue": "2",
"raw": "2n"
},
"value": "2"
},
"computed": false,
"kind": "get",
"id": null,
"generator": false,
"async": false,
"params": [],
"body": {
"type": "BlockStatement",
"start":27,"end":29,"loc":{"start":{"line":1,"column":27},"end":{"line":1,"column":29}},
"body": [],
"directives": []
}
},
{
"type": "ObjectMethod",
"start":31,"end":42,"loc":{"start":{"line":1,"column":31},"end":{"line":1,"column":42}},
"method": false,
"key": {
"type": "BigIntLiteral",
"start":35,"end":37,"loc":{"start":{"line":1,"column":35},"end":{"line":1,"column":37}},
"extra": {
"rawValue": "3",
"raw": "3n"
},
"value": "3"
},
"computed": false,
"kind": "set",
"id": null,
"generator": false,
"async": false,
"params": [
{
"type": "Identifier",
"start":38,"end":39,"loc":{"start":{"line":1,"column":38},"end":{"line":1,"column":39},"identifierName":"_"},
"name": "_"
}
],
"body": {
"type": "BlockStatement",
"start":40,"end":42,"loc":{"start":{"line":1,"column":40},"end":{"line":1,"column":42}},
"body": [],
"directives": []
}
},
{
"type": "ObjectMethod",
"start":44,"end":57,"loc":{"start":{"line":1,"column":44},"end":{"line":1,"column":57}},
"method": true,
"key": {
"type": "BigIntLiteral",
"start":50,"end":52,"loc":{"start":{"line":1,"column":50},"end":{"line":1,"column":52}},
"extra": {
"rawValue": "4",
"raw": "4n"
},
"value": "4"
},
"computed": false,
"kind": "method",
"id": null,
"generator": false,
"async": true,
"params": [],
"body": {
"type": "BlockStatement",
"start":55,"end":57,"loc":{"start":{"line":1,"column":55},"end":{"line":1,"column":57}},
"body": [],
"directives": []
}
},
{
"type": "ObjectMethod",
"start":59,"end":67,"loc":{"start":{"line":1,"column":59},"end":{"line":1,"column":67}},
"method": true,
"key": {
"type": "BigIntLiteral",
"start":60,"end":62,"loc":{"start":{"line":1,"column":60},"end":{"line":1,"column":62}},
"extra": {
"rawValue": "5",
"raw": "5n"
},
"value": "5"
},
"computed": false,
"kind": "method",
"id": null,
"generator": true,
"async": false,
"params": [],
"body": {
"type": "BlockStatement",
"start":65,"end":67,"loc":{"start":{"line":1,"column":65},"end":{"line":1,"column":67}},
"body": [],
"directives": []
}
}
],
"extra": {
Expand Down