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Keep instantiation expression symbols distinct and stable #64123
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Merged
Jake Bailey (jakebailey)
merged 1 commit into
microsoft:main
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Andarist:fix-64116-instantiation-expression-symbol
Sep 1, 2026
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31 changes: 31 additions & 0 deletions
31
tsc/testdata/baselines/reference/compiler/classExtendsInstantiationExpressionType.errors.txt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| classExtendsInstantiationExpressionType.ts(16,13): error TS2345: Argument of type '"foo3"' is not assignable to parameter of type '"foo" | "foo2"'. | ||
| classExtendsInstantiationExpressionType.ts(21,13): error TS2345: Argument of type '"foo3"' is not assignable to parameter of type '"foo" | "foo2"'. | ||
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| ==== classExtendsInstantiationExpressionType.ts (2 errors) ==== | ||
| // Regression test for https://github.com/microsoft/TypeScript/issues/64116 | ||
| declare function createComponent<Props extends {}, Events extends {}>( | ||
| render: { props: Props, events: Events } | ||
| ): typeof Component<Events>; | ||
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| declare class Component<Events extends {} = Record<string, any>> { | ||
| $on<K extends keyof Events>(event: K, handler: (e: Events[K]) => void): void; | ||
| } | ||
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| const B = createComponent({ | ||
| props: {}, | ||
| events: { foo: "", foo2: "2" } | ||
| }); | ||
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| new B().$on("foo", e => {}); | ||
| new B().$on("foo3", e => {}); | ||
| ~~~~~~ | ||
| !!! error TS2345: Argument of type '"foo3"' is not assignable to parameter of type '"foo" | "foo2"'. | ||
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| class C extends B {} | ||
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| new C().$on("foo", e => {}); | ||
| new C().$on("foo3", e => {}); | ||
| ~~~~~~ | ||
| !!! error TS2345: Argument of type '"foo3"' is not assignable to parameter of type '"foo" | "foo2"'. | ||
|
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79 changes: 79 additions & 0 deletions
79
tsc/testdata/baselines/reference/compiler/classExtendsInstantiationExpressionType.symbols
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| //// [tests/cases/compiler/classExtendsInstantiationExpressionType.ts] //// | ||
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| === classExtendsInstantiationExpressionType.ts === | ||
| // Regression test for https://github.com/microsoft/TypeScript/issues/64116 | ||
| declare function createComponent<Props extends {}, Events extends {}>( | ||
| >createComponent : Symbol(createComponent, Decl(classExtendsInstantiationExpressionType.ts, 0, 0)) | ||
| >Props : Symbol(Props, Decl(classExtendsInstantiationExpressionType.ts, 1, 33)) | ||
| >Events : Symbol(Events, Decl(classExtendsInstantiationExpressionType.ts, 1, 50)) | ||
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| render: { props: Props, events: Events } | ||
| >render : Symbol(render, Decl(classExtendsInstantiationExpressionType.ts, 1, 70)) | ||
| >props : Symbol(props, Decl(classExtendsInstantiationExpressionType.ts, 2, 13)) | ||
| >Props : Symbol(Props, Decl(classExtendsInstantiationExpressionType.ts, 1, 33)) | ||
| >events : Symbol(events, Decl(classExtendsInstantiationExpressionType.ts, 2, 27)) | ||
| >Events : Symbol(Events, Decl(classExtendsInstantiationExpressionType.ts, 1, 50)) | ||
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| ): typeof Component<Events>; | ||
| >Component : Symbol(Component, Decl(classExtendsInstantiationExpressionType.ts, 3, 28)) | ||
| >Events : Symbol(Events, Decl(classExtendsInstantiationExpressionType.ts, 1, 50)) | ||
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| declare class Component<Events extends {} = Record<string, any>> { | ||
| >Component : Symbol(Component, Decl(classExtendsInstantiationExpressionType.ts, 3, 28)) | ||
| >Events : Symbol(Events, Decl(classExtendsInstantiationExpressionType.ts, 5, 24)) | ||
| >Record : Symbol(Record, Decl(lib.es5.d.ts, --, --)) | ||
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| $on<K extends keyof Events>(event: K, handler: (e: Events[K]) => void): void; | ||
| >$on : Symbol(Component.$on, Decl(classExtendsInstantiationExpressionType.ts, 5, 66)) | ||
| >K : Symbol(K, Decl(classExtendsInstantiationExpressionType.ts, 6, 8)) | ||
| >Events : Symbol(Events, Decl(classExtendsInstantiationExpressionType.ts, 5, 24)) | ||
| >event : Symbol(event, Decl(classExtendsInstantiationExpressionType.ts, 6, 32)) | ||
| >K : Symbol(K, Decl(classExtendsInstantiationExpressionType.ts, 6, 8)) | ||
| >handler : Symbol(handler, Decl(classExtendsInstantiationExpressionType.ts, 6, 41)) | ||
| >e : Symbol(e, Decl(classExtendsInstantiationExpressionType.ts, 6, 52)) | ||
| >Events : Symbol(Events, Decl(classExtendsInstantiationExpressionType.ts, 5, 24)) | ||
| >K : Symbol(K, Decl(classExtendsInstantiationExpressionType.ts, 6, 8)) | ||
| } | ||
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| const B = createComponent({ | ||
| >B : Symbol(B, Decl(classExtendsInstantiationExpressionType.ts, 9, 5)) | ||
| >createComponent : Symbol(createComponent, Decl(classExtendsInstantiationExpressionType.ts, 0, 0)) | ||
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| props: {}, | ||
| >props : Symbol(props, Decl(classExtendsInstantiationExpressionType.ts, 9, 27)) | ||
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| events: { foo: "", foo2: "2" } | ||
| >events : Symbol(events, Decl(classExtendsInstantiationExpressionType.ts, 10, 14)) | ||
| >foo : Symbol(foo, Decl(classExtendsInstantiationExpressionType.ts, 11, 13)) | ||
| >foo2 : Symbol(foo2, Decl(classExtendsInstantiationExpressionType.ts, 11, 22)) | ||
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| }); | ||
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| new B().$on("foo", e => {}); | ||
| >new B().$on : Symbol(Component.$on, Decl(classExtendsInstantiationExpressionType.ts, 5, 66)) | ||
| >B : Symbol(B, Decl(classExtendsInstantiationExpressionType.ts, 9, 5)) | ||
| >$on : Symbol(Component.$on, Decl(classExtendsInstantiationExpressionType.ts, 5, 66)) | ||
| >e : Symbol(e, Decl(classExtendsInstantiationExpressionType.ts, 14, 18)) | ||
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| new B().$on("foo3", e => {}); | ||
| >new B().$on : Symbol(Component.$on, Decl(classExtendsInstantiationExpressionType.ts, 5, 66)) | ||
| >B : Symbol(B, Decl(classExtendsInstantiationExpressionType.ts, 9, 5)) | ||
| >$on : Symbol(Component.$on, Decl(classExtendsInstantiationExpressionType.ts, 5, 66)) | ||
| >e : Symbol(e, Decl(classExtendsInstantiationExpressionType.ts, 15, 19)) | ||
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| class C extends B {} | ||
| >C : Symbol(C, Decl(classExtendsInstantiationExpressionType.ts, 15, 29)) | ||
| >B : Symbol(B, Decl(classExtendsInstantiationExpressionType.ts, 9, 5)) | ||
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| new C().$on("foo", e => {}); | ||
| >new C().$on : Symbol(Component.$on, Decl(classExtendsInstantiationExpressionType.ts, 5, 66)) | ||
| >C : Symbol(C, Decl(classExtendsInstantiationExpressionType.ts, 15, 29)) | ||
| >$on : Symbol(Component.$on, Decl(classExtendsInstantiationExpressionType.ts, 5, 66)) | ||
| >e : Symbol(e, Decl(classExtendsInstantiationExpressionType.ts, 19, 18)) | ||
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| new C().$on("foo3", e => {}); | ||
| >new C().$on : Symbol(Component.$on, Decl(classExtendsInstantiationExpressionType.ts, 5, 66)) | ||
| >C : Symbol(C, Decl(classExtendsInstantiationExpressionType.ts, 15, 29)) | ||
| >$on : Symbol(Component.$on, Decl(classExtendsInstantiationExpressionType.ts, 5, 66)) | ||
| >e : Symbol(e, Decl(classExtendsInstantiationExpressionType.ts, 20, 19)) | ||
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89 changes: 89 additions & 0 deletions
89
tsc/testdata/baselines/reference/compiler/classExtendsInstantiationExpressionType.types
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| //// [tests/cases/compiler/classExtendsInstantiationExpressionType.ts] //// | ||
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| === classExtendsInstantiationExpressionType.ts === | ||
| // Regression test for https://github.com/microsoft/TypeScript/issues/64116 | ||
| declare function createComponent<Props extends {}, Events extends {}>( | ||
| >createComponent : <Props extends {}, Events extends {}>(render: { props: Props; events: Events; }) => typeof Component<Events> | ||
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| render: { props: Props, events: Events } | ||
| >render : { props: Props; events: Events; } | ||
| >props : Props | ||
| >events : Events | ||
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| ): typeof Component<Events>; | ||
| >Component : typeof Component | ||
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| declare class Component<Events extends {} = Record<string, any>> { | ||
| >Component : Component<Events> | ||
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| $on<K extends keyof Events>(event: K, handler: (e: Events[K]) => void): void; | ||
| >$on : <K extends keyof Events>(event: K, handler: (e: Events[K]) => void) => void | ||
| >event : K | ||
| >handler : (e: Events[K]) => void | ||
| >e : Events[K] | ||
| } | ||
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| const B = createComponent({ | ||
| >B : { new (): Component<{ foo: string; foo2: string; }>; prototype: Component<any>; } | ||
| >createComponent({ props: {}, events: { foo: "", foo2: "2" }}) : { new (): Component<{ foo: string; foo2: string; }>; prototype: Component<any>; } | ||
| >createComponent : <Props extends {}, Events extends {}>(render: { props: Props; events: Events; }) => typeof Component<Events> | ||
| >{ props: {}, events: { foo: "", foo2: "2" }} : { props: {}; events: { foo: string; foo2: string; }; } | ||
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| props: {}, | ||
| >props : {} | ||
| >{} : {} | ||
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| events: { foo: "", foo2: "2" } | ||
| >events : { foo: string; foo2: string; } | ||
| >{ foo: "", foo2: "2" } : { foo: string; foo2: string; } | ||
| >foo : string | ||
| >"" : "" | ||
| >foo2 : string | ||
| >"2" : "2" | ||
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| }); | ||
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| new B().$on("foo", e => {}); | ||
| >new B().$on("foo", e => {}) : void | ||
| >new B().$on : <K extends "foo" | "foo2">(event: K, handler: (e: { foo: string; foo2: string; }[K]) => void) => void | ||
| >new B() : Component<{ foo: string; foo2: string; }> | ||
| >B : { new (): Component<{ foo: string; foo2: string; }>; prototype: Component<any>; } | ||
| >$on : <K extends "foo" | "foo2">(event: K, handler: (e: { foo: string; foo2: string; }[K]) => void) => void | ||
| >"foo" : "foo" | ||
| >e => {} : (e: string) => void | ||
| >e : string | ||
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| new B().$on("foo3", e => {}); | ||
| >new B().$on("foo3", e => {}) : void | ||
| >new B().$on : <K extends "foo" | "foo2">(event: K, handler: (e: { foo: string; foo2: string; }[K]) => void) => void | ||
| >new B() : Component<{ foo: string; foo2: string; }> | ||
| >B : { new (): Component<{ foo: string; foo2: string; }>; prototype: Component<any>; } | ||
| >$on : <K extends "foo" | "foo2">(event: K, handler: (e: { foo: string; foo2: string; }[K]) => void) => void | ||
| >"foo3" : "foo3" | ||
| >e => {} : (e: string) => void | ||
| >e : string | ||
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| class C extends B {} | ||
| >C : C | ||
| >B : Component<{ foo: string; foo2: string; }> | ||
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| new C().$on("foo", e => {}); | ||
| >new C().$on("foo", e => {}) : void | ||
| >new C().$on : <K extends "foo" | "foo2">(event: K, handler: (e: { foo: string; foo2: string; }[K]) => void) => void | ||
| >new C() : C | ||
| >C : typeof C | ||
| >$on : <K extends "foo" | "foo2">(event: K, handler: (e: { foo: string; foo2: string; }[K]) => void) => void | ||
| >"foo" : "foo" | ||
| >e => {} : (e: string) => void | ||
| >e : string | ||
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| new C().$on("foo3", e => {}); | ||
| >new C().$on("foo3", e => {}) : void | ||
| >new C().$on : <K extends "foo" | "foo2">(event: K, handler: (e: { foo: string; foo2: string; }[K]) => void) => void | ||
| >new C() : C | ||
| >C : typeof C | ||
| >$on : <K extends "foo" | "foo2">(event: K, handler: (e: { foo: string; foo2: string; }[K]) => void) => void | ||
| >"foo3" : "foo3" | ||
| >e => {} : (e: string) => void | ||
| >e : string | ||
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23 changes: 23 additions & 0 deletions
23
tsc/testdata/tests/cases/compiler/classExtendsInstantiationExpressionType.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,23 @@ | ||
| // @noEmit: true | ||
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| // Regression test for https://github.com/microsoft/TypeScript/issues/64116 | ||
| declare function createComponent<Props extends {}, Events extends {}>( | ||
| render: { props: Props, events: Events } | ||
| ): typeof Component<Events>; | ||
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| declare class Component<Events extends {} = Record<string, any>> { | ||
| $on<K extends keyof Events>(event: K, handler: (e: Events[K]) => void): void; | ||
| } | ||
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| const B = createComponent({ | ||
| props: {}, | ||
| events: { foo: "", foo2: "2" } | ||
| }); | ||
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| new B().$on("foo", e => {}); | ||
| new B().$on("foo3", e => {}); | ||
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| class C extends B {} | ||
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| new C().$on("foo", e => {}); | ||
| new C().$on("foo3", e => {}); |
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Is
Declarationsstable between every type-checker?There was a problem hiding this comment.
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Yes, that should be.