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Properly handle non-generic string mapping types in unions and intersections #57197
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| //// [tests/cases/conformance/types/literal/stringMappingReduction.ts] //// | ||
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| === stringMappingReduction.ts === | ||
| type T00 = "prop" | `p${Lowercase<string>}p`; // `p${Lowercase<string>}p` | ||
| >T00 : Symbol(T00, Decl(stringMappingReduction.ts, 0, 0)) | ||
| >Lowercase : Symbol(Lowercase, Decl(lib.es5.d.ts, --, --)) | ||
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| type T01 = "prop" | Lowercase<string>; // Lowercase<string> | ||
| >T01 : Symbol(T01, Decl(stringMappingReduction.ts, 0, 45)) | ||
| >Lowercase : Symbol(Lowercase, Decl(lib.es5.d.ts, --, --)) | ||
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| type T02 = "PROP" | Lowercase<string>; // "PROP" | Lowercase<string> | ||
| >T02 : Symbol(T02, Decl(stringMappingReduction.ts, 1, 38)) | ||
| >Lowercase : Symbol(Lowercase, Decl(lib.es5.d.ts, --, --)) | ||
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| type T10 = "prop" & `p${Lowercase<string>}p`; // "prop" | ||
| >T10 : Symbol(T10, Decl(stringMappingReduction.ts, 2, 38)) | ||
| >Lowercase : Symbol(Lowercase, Decl(lib.es5.d.ts, --, --)) | ||
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| type T11 = "prop" & Lowercase<string>; // "prop" | ||
| >T11 : Symbol(T11, Decl(stringMappingReduction.ts, 4, 45)) | ||
| >Lowercase : Symbol(Lowercase, Decl(lib.es5.d.ts, --, --)) | ||
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| type T12 = "PROP" & Lowercase<string>; // never | ||
| >T12 : Symbol(T12, Decl(stringMappingReduction.ts, 5, 38)) | ||
| >Lowercase : Symbol(Lowercase, Decl(lib.es5.d.ts, --, --)) | ||
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| type T20 = "prop" | Capitalize<string>; // "prop" | Capitalize<string> | ||
| >T20 : Symbol(T20, Decl(stringMappingReduction.ts, 6, 38)) | ||
| >Capitalize : Symbol(Capitalize, Decl(lib.es5.d.ts, --, --)) | ||
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| type T21 = "Prop" | Capitalize<string>; // Capitalize<string> | ||
| >T21 : Symbol(T21, Decl(stringMappingReduction.ts, 8, 39)) | ||
| >Capitalize : Symbol(Capitalize, Decl(lib.es5.d.ts, --, --)) | ||
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| type T22 = "PROP" | Capitalize<string>; // Capitalize<string> | ||
| >T22 : Symbol(T22, Decl(stringMappingReduction.ts, 9, 39)) | ||
| >Capitalize : Symbol(Capitalize, Decl(lib.es5.d.ts, --, --)) | ||
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| type T30 = "prop" & Capitalize<string>; // never | ||
| >T30 : Symbol(T30, Decl(stringMappingReduction.ts, 10, 39)) | ||
| >Capitalize : Symbol(Capitalize, Decl(lib.es5.d.ts, --, --)) | ||
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| type T31 = "Prop" & Capitalize<string>; // "Prop" | ||
| >T31 : Symbol(T31, Decl(stringMappingReduction.ts, 12, 39)) | ||
| >Capitalize : Symbol(Capitalize, Decl(lib.es5.d.ts, --, --)) | ||
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| type T32 = "PROP" & Capitalize<string>; // "PROP" | ||
| >T32 : Symbol(T32, Decl(stringMappingReduction.ts, 13, 39)) | ||
| >Capitalize : Symbol(Capitalize, Decl(lib.es5.d.ts, --, --)) | ||
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| // Repro from #57117 | ||
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| type EMap = { event: {} } | ||
| >EMap : Symbol(EMap, Decl(stringMappingReduction.ts, 14, 39)) | ||
| >event : Symbol(event, Decl(stringMappingReduction.ts, 18, 13)) | ||
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| type Keys = keyof EMap | ||
| >Keys : Symbol(Keys, Decl(stringMappingReduction.ts, 18, 25)) | ||
| >EMap : Symbol(EMap, Decl(stringMappingReduction.ts, 14, 39)) | ||
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| type EPlusFallback<C> = C extends Keys ? EMap[C] : "unrecognised event"; | ||
| >EPlusFallback : Symbol(EPlusFallback, Decl(stringMappingReduction.ts, 19, 22)) | ||
| >C : Symbol(C, Decl(stringMappingReduction.ts, 20, 19)) | ||
| >C : Symbol(C, Decl(stringMappingReduction.ts, 20, 19)) | ||
| >Keys : Symbol(Keys, Decl(stringMappingReduction.ts, 18, 25)) | ||
| >EMap : Symbol(EMap, Decl(stringMappingReduction.ts, 14, 39)) | ||
| >C : Symbol(C, Decl(stringMappingReduction.ts, 20, 19)) | ||
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| type VirtualEvent<T extends string> = { bivarianceHack(event: EPlusFallback<Lowercase<T>>): any; }['bivarianceHack']; | ||
| >VirtualEvent : Symbol(VirtualEvent, Decl(stringMappingReduction.ts, 20, 72)) | ||
| >T : Symbol(T, Decl(stringMappingReduction.ts, 21, 18)) | ||
| >bivarianceHack : Symbol(bivarianceHack, Decl(stringMappingReduction.ts, 21, 39)) | ||
| >event : Symbol(event, Decl(stringMappingReduction.ts, 21, 55)) | ||
| >EPlusFallback : Symbol(EPlusFallback, Decl(stringMappingReduction.ts, 19, 22)) | ||
| >Lowercase : Symbol(Lowercase, Decl(lib.es5.d.ts, --, --)) | ||
| >T : Symbol(T, Decl(stringMappingReduction.ts, 21, 18)) | ||
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| declare const _virtualOn: (eventQrl: VirtualEvent<Keys>) => void; | ||
| >_virtualOn : Symbol(_virtualOn, Decl(stringMappingReduction.ts, 22, 13)) | ||
| >eventQrl : Symbol(eventQrl, Decl(stringMappingReduction.ts, 22, 27)) | ||
| >VirtualEvent : Symbol(VirtualEvent, Decl(stringMappingReduction.ts, 20, 72)) | ||
| >Keys : Symbol(Keys, Decl(stringMappingReduction.ts, 18, 25)) | ||
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| export const virtualOn = <T extends string>(eventQrl: VirtualEvent<T>) => { | ||
| >virtualOn : Symbol(virtualOn, Decl(stringMappingReduction.ts, 23, 12)) | ||
| >T : Symbol(T, Decl(stringMappingReduction.ts, 23, 26)) | ||
| >eventQrl : Symbol(eventQrl, Decl(stringMappingReduction.ts, 23, 44)) | ||
| >VirtualEvent : Symbol(VirtualEvent, Decl(stringMappingReduction.ts, 20, 72)) | ||
| >T : Symbol(T, Decl(stringMappingReduction.ts, 23, 26)) | ||
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| _virtualOn(eventQrl); | ||
| >_virtualOn : Symbol(_virtualOn, Decl(stringMappingReduction.ts, 22, 13)) | ||
| >eventQrl : Symbol(eventQrl, Decl(stringMappingReduction.ts, 23, 44)) | ||
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| }; | ||
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|
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| //// [tests/cases/conformance/types/literal/stringMappingReduction.ts] //// | ||
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| === stringMappingReduction.ts === | ||
| type T00 = "prop" | `p${Lowercase<string>}p`; // `p${Lowercase<string>}p` | ||
| >T00 : `p${Lowercase<string>}p` | ||
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| type T01 = "prop" | Lowercase<string>; // Lowercase<string> | ||
| >T01 : Lowercase<string> | ||
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| type T02 = "PROP" | Lowercase<string>; // "PROP" | Lowercase<string> | ||
| >T02 : Lowercase<string> | "PROP" | ||
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| type T10 = "prop" & `p${Lowercase<string>}p`; // "prop" | ||
| >T10 : "prop" | ||
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| type T11 = "prop" & Lowercase<string>; // "prop" | ||
| >T11 : "prop" | ||
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| type T12 = "PROP" & Lowercase<string>; // never | ||
| >T12 : never | ||
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| type T20 = "prop" | Capitalize<string>; // "prop" | Capitalize<string> | ||
| >T20 : "prop" | Capitalize<string> | ||
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| type T21 = "Prop" | Capitalize<string>; // Capitalize<string> | ||
| >T21 : Capitalize<string> | ||
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| type T22 = "PROP" | Capitalize<string>; // Capitalize<string> | ||
| >T22 : Capitalize<string> | ||
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| type T30 = "prop" & Capitalize<string>; // never | ||
| >T30 : never | ||
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| type T31 = "Prop" & Capitalize<string>; // "Prop" | ||
| >T31 : "Prop" | ||
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| type T32 = "PROP" & Capitalize<string>; // "PROP" | ||
| >T32 : "PROP" | ||
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| // Repro from #57117 | ||
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| type EMap = { event: {} } | ||
| >EMap : { event: {}; } | ||
| >event : {} | ||
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| type Keys = keyof EMap | ||
| >Keys : "event" | ||
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| type EPlusFallback<C> = C extends Keys ? EMap[C] : "unrecognised event"; | ||
| >EPlusFallback : EPlusFallback<C> | ||
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| type VirtualEvent<T extends string> = { bivarianceHack(event: EPlusFallback<Lowercase<T>>): any; }['bivarianceHack']; | ||
| >VirtualEvent : (event: EPlusFallback<Lowercase<T>>) => any | ||
| >bivarianceHack : (event: EPlusFallback<Lowercase<T>>) => any | ||
| >event : EPlusFallback<Lowercase<T>> | ||
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| declare const _virtualOn: (eventQrl: VirtualEvent<Keys>) => void; | ||
| >_virtualOn : (eventQrl: VirtualEvent<Keys>) => void | ||
| >eventQrl : (event: {}) => any | ||
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| export const virtualOn = <T extends string>(eventQrl: VirtualEvent<T>) => { | ||
| >virtualOn : <T extends string>(eventQrl: VirtualEvent<T>) => void | ||
| ><T extends string>(eventQrl: VirtualEvent<T>) => { _virtualOn(eventQrl);} : <T extends string>(eventQrl: VirtualEvent<T>) => void | ||
| >eventQrl : (event: EPlusFallback<Lowercase<T>>) => any | ||
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| _virtualOn(eventQrl); | ||
| >_virtualOn(eventQrl) : void | ||
| >_virtualOn : (eventQrl: (event: {}) => any) => void | ||
| >eventQrl : (event: EPlusFallback<Lowercase<T>>) => any | ||
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| }; | ||
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29 changes: 29 additions & 0 deletions
29
tests/cases/conformance/types/literal/stringMappingReduction.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,29 @@ | ||
| // @strict: true | ||
| // @noEmit: true | ||
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| type T00 = "prop" | `p${Lowercase<string>}p`; // `p${Lowercase<string>}p` | ||
| type T01 = "prop" | Lowercase<string>; // Lowercase<string> | ||
| type T02 = "PROP" | Lowercase<string>; // "PROP" | Lowercase<string> | ||
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| type T10 = "prop" & `p${Lowercase<string>}p`; // "prop" | ||
| type T11 = "prop" & Lowercase<string>; // "prop" | ||
| type T12 = "PROP" & Lowercase<string>; // never | ||
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| type T20 = "prop" | Capitalize<string>; // "prop" | Capitalize<string> | ||
| type T21 = "Prop" | Capitalize<string>; // Capitalize<string> | ||
| type T22 = "PROP" | Capitalize<string>; // Capitalize<string> | ||
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| type T30 = "prop" & Capitalize<string>; // never | ||
| type T31 = "Prop" & Capitalize<string>; // "Prop" | ||
| type T32 = "PROP" & Capitalize<string>; // "PROP" | ||
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| // Repro from #57117 | ||
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| type EMap = { event: {} } | ||
| type Keys = keyof EMap | ||
| type EPlusFallback<C> = C extends Keys ? EMap[C] : "unrecognised event"; | ||
| type VirtualEvent<T extends string> = { bivarianceHack(event: EPlusFallback<Lowercase<T>>): any; }['bivarianceHack']; | ||
| declare const _virtualOn: (eventQrl: VirtualEvent<Keys>) => void; | ||
| export const virtualOn = <T extends string>(eventQrl: VirtualEvent<T>) => { | ||
| _virtualOn(eventQrl); | ||
| }; |
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This is kind of funky - I'd just directly make this
IncludesConstrainedTypeVariable.