4d4ea66a9c
This diff extends the types checked by discriminateContextualTypeByObjectMembers and discriminateContextualTypeByJSXAttributes to also include any optional components in the type union. fixes #41759 although it doesn't address the better error reporting for their last repro, which I'm not sure how to address.
99 lines
3.1 KiB
Plaintext
99 lines
3.1 KiB
Plaintext
=== tests/cases/compiler/tsxDiscriminantPropertyInference.tsx ===
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// Repro from #41759
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namespace JSX {
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export interface Element {}
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}
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type DiscriminatorTrue = {
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>DiscriminatorTrue : DiscriminatorTrue
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disc: true;
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>disc : true
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>true : true
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cb: (x: string) => void;
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>cb : (x: string) => void
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>x : string
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}
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type DiscriminatorFalse = {
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>DiscriminatorFalse : DiscriminatorFalse
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disc?: false;
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>disc : false | undefined
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>false : false
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cb: (x: number) => void;
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>cb : (x: number) => void
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>x : number
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}
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type Props = DiscriminatorTrue | DiscriminatorFalse;
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>Props : Props
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declare function Comp(props: DiscriminatorTrue | DiscriminatorFalse): JSX.Element;
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>Comp : (props: DiscriminatorTrue | DiscriminatorFalse) => JSX.Element
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>props : DiscriminatorTrue | DiscriminatorFalse
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>JSX : any
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// simple inference
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void (<Comp disc cb={s => parseInt(s)} />);
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>void (<Comp disc cb={s => parseInt(s)} />) : undefined
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>(<Comp disc cb={s => parseInt(s)} />) : JSX.Element
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><Comp disc cb={s => parseInt(s)} /> : JSX.Element
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>Comp : (props: DiscriminatorTrue | DiscriminatorFalse) => JSX.Element
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>disc : true
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>cb : (s: string) => number
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>s => parseInt(s) : (s: string) => number
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>s : string
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>parseInt(s) : number
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>parseInt : (string: string, radix?: number | undefined) => number
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>s : string
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// simple inference
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void (<Comp disc={false} cb={n => n.toFixed()} />);
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>void (<Comp disc={false} cb={n => n.toFixed()} />) : undefined
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>(<Comp disc={false} cb={n => n.toFixed()} />) : JSX.Element
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><Comp disc={false} cb={n => n.toFixed()} /> : JSX.Element
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>Comp : (props: DiscriminatorTrue | DiscriminatorFalse) => JSX.Element
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>disc : false
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>false : false
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>cb : (n: number) => string
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>n => n.toFixed() : (n: number) => string
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>n : number
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>n.toFixed() : string
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>n.toFixed : (fractionDigits?: number | undefined) => string
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>n : number
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>toFixed : (fractionDigits?: number | undefined) => string
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// simple inference when strict-null-checks are enabled
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void (<Comp disc={undefined} cb={n => n.toFixed()} />);
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>void (<Comp disc={undefined} cb={n => n.toFixed()} />) : undefined
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>(<Comp disc={undefined} cb={n => n.toFixed()} />) : JSX.Element
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><Comp disc={undefined} cb={n => n.toFixed()} /> : JSX.Element
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>Comp : (props: DiscriminatorTrue | DiscriminatorFalse) => JSX.Element
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>disc : undefined
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>undefined : undefined
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>cb : (n: number) => string
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>n => n.toFixed() : (n: number) => string
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>n : number
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>n.toFixed() : string
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>n.toFixed : (fractionDigits?: number | undefined) => string
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>n : number
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>toFixed : (fractionDigits?: number | undefined) => string
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// requires checking type information since discriminator is missing from object
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void (<Comp cb={n => n.toFixed()} />);
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>void (<Comp cb={n => n.toFixed()} />) : undefined
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>(<Comp cb={n => n.toFixed()} />) : JSX.Element
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><Comp cb={n => n.toFixed()} /> : JSX.Element
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>Comp : (props: DiscriminatorTrue | DiscriminatorFalse) => JSX.Element
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>cb : (n: number) => string
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>n => n.toFixed() : (n: number) => string
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>n : number
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>n.toFixed() : string
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>n.toFixed : (fractionDigits?: number | undefined) => string
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>n : number
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>toFixed : (fractionDigits?: number | undefined) => string
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