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Fixed nullish coalesce operator's precedence #61372
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45 changes: 45 additions & 0 deletions
45
tests/baselines/reference/nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,45 @@ | ||
| //// [tests/cases/conformance/expressions/nullishCoalescingOperator/nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.ts] //// | ||
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| //// [nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.ts] | ||
| // https://github.com/microsoft/TypeScript/issues/61109 | ||
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| class Cls { | ||
| #privateProp: number | undefined; | ||
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| problem() { | ||
| this.#privateProp ??= false ? neverThis() : 20; | ||
| } | ||
| } | ||
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| function neverThis(): never { | ||
| throw new Error("This should really really never happen!"); | ||
| } | ||
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| //// [nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.js] | ||
| "use strict"; | ||
| // https://github.com/microsoft/TypeScript/issues/61109 | ||
| var __classPrivateFieldGet = (this && this.__classPrivateFieldGet) || function (receiver, state, kind, f) { | ||
| if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a getter"); | ||
| if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot read private member from an object whose class did not declare it"); | ||
| return kind === "m" ? f : kind === "a" ? f.call(receiver) : f ? f.value : state.get(receiver); | ||
| }; | ||
| var __classPrivateFieldSet = (this && this.__classPrivateFieldSet) || function (receiver, state, value, kind, f) { | ||
| if (kind === "m") throw new TypeError("Private method is not writable"); | ||
| if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a setter"); | ||
| if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot write private member to an object whose class did not declare it"); | ||
| return (kind === "a" ? f.call(receiver, value) : f ? f.value = value : state.set(receiver, value)), value; | ||
| }; | ||
| var _Cls_privateProp; | ||
| class Cls { | ||
| constructor() { | ||
| _Cls_privateProp.set(this, void 0); | ||
| } | ||
| problem() { | ||
| __classPrivateFieldSet(this, _Cls_privateProp, __classPrivateFieldGet(this, _Cls_privateProp, "f") ?? (false ? neverThis() : 20), "f"); | ||
| } | ||
| } | ||
| _Cls_privateProp = new WeakMap(); | ||
| function neverThis() { | ||
| throw new Error("This should really really never happen!"); | ||
| } |
28 changes: 28 additions & 0 deletions
28
tests/baselines/reference/nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.symbols
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,28 @@ | ||
| //// [tests/cases/conformance/expressions/nullishCoalescingOperator/nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.ts] //// | ||
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| === nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.ts === | ||
| // https://github.com/microsoft/TypeScript/issues/61109 | ||
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| class Cls { | ||
| >Cls : Symbol(Cls, Decl(nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.ts, 0, 0)) | ||
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| #privateProp: number | undefined; | ||
| >#privateProp : Symbol(Cls.#privateProp, Decl(nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.ts, 2, 11)) | ||
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| problem() { | ||
| >problem : Symbol(Cls.problem, Decl(nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.ts, 3, 35)) | ||
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| this.#privateProp ??= false ? neverThis() : 20; | ||
| >this.#privateProp : Symbol(Cls.#privateProp, Decl(nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.ts, 2, 11)) | ||
| >this : Symbol(Cls, Decl(nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.ts, 0, 0)) | ||
| >neverThis : Symbol(neverThis, Decl(nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.ts, 8, 1)) | ||
| } | ||
| } | ||
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| function neverThis(): never { | ||
| >neverThis : Symbol(neverThis, Decl(nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.ts, 8, 1)) | ||
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| throw new Error("This should really really never happen!"); | ||
| >Error : Symbol(Error, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --)) | ||
| } | ||
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|
50 changes: 50 additions & 0 deletions
50
tests/baselines/reference/nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.types
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| //// [tests/cases/conformance/expressions/nullishCoalescingOperator/nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.ts] //// | ||
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| === nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.ts === | ||
| // https://github.com/microsoft/TypeScript/issues/61109 | ||
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| class Cls { | ||
| >Cls : Cls | ||
| > : ^^^ | ||
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| #privateProp: number | undefined; | ||
| >#privateProp : number | undefined | ||
| > : ^^^^^^^^^^^^^^^^^^ | ||
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| problem() { | ||
| >problem : () => void | ||
| > : ^^^^^^^^^^ | ||
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| this.#privateProp ??= false ? neverThis() : 20; | ||
| >this.#privateProp ??= false ? neverThis() : 20 : number | ||
| > : ^^^^^^ | ||
| >this.#privateProp : number | undefined | ||
| > : ^^^^^^^^^^^^^^^^^^ | ||
| >this : this | ||
| > : ^^^^ | ||
| >false ? neverThis() : 20 : 20 | ||
| > : ^^ | ||
| >false : false | ||
| > : ^^^^^ | ||
| >neverThis() : never | ||
| > : ^^^^^ | ||
| >neverThis : () => never | ||
| > : ^^^^^^ | ||
| >20 : 20 | ||
| > : ^^ | ||
| } | ||
| } | ||
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| function neverThis(): never { | ||
| >neverThis : () => never | ||
| > : ^^^^^^ | ||
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| throw new Error("This should really really never happen!"); | ||
| >new Error("This should really really never happen!") : Error | ||
| > : ^^^^^ | ||
| >Error : ErrorConstructor | ||
| > : ^^^^^^^^^^^^^^^^ | ||
| >"This should really really never happen!" : "This should really really never happen!" | ||
| > : ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | ||
| } | ||
|
|
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1 change: 1 addition & 0 deletions
1
...pi/printsNodeCorrectly.binaryAmpersandAmpersandExpressionWithLeftConditionalExpression.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1 @@ | ||
| (a ? b : c) && d; |
1 change: 1 addition & 0 deletions
1
...nce/printerApi/printsNodeCorrectly.binaryBarBarExpressionWithLeftConditionalExpression.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1 @@ | ||
| (a ? b : c) || d; |
1 change: 1 addition & 0 deletions
1
...rApi/printsNodeCorrectly.binaryQuestionQuestionExpressionWithLeftConditionalExpression.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1 @@ | ||
| (a ? b : c) ?? d; |
16 changes: 16 additions & 0 deletions
16
...xpressions/nullishCoalescingOperator/nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,16 @@ | ||
| // @strict: true | ||
| // @target: es2021 | ||
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| // https://github.com/microsoft/TypeScript/issues/61109 | ||
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| class Cls { | ||
| #privateProp: number | undefined; | ||
|
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| problem() { | ||
| this.#privateProp ??= false ? neverThis() : 20; | ||
| } | ||
| } | ||
|
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| function neverThis(): never { | ||
| throw new Error("This should really really never happen!"); | ||
| } |
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I wonder how old this comment is...
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6 years, it was added in #35282