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=== tests/cases/compiler/discriminantPropertyInference.ts ===
// Repro from #41759
type DiscriminatorTrue = {
>DiscriminatorTrue : { disc: true; cb: (x: string) => void; }
disc: true;
>disc : true
>true : true
cb: (x: string) => void;
>cb : (x: string) => void
>x : string
}
type DiscriminatorFalse = {
>DiscriminatorFalse : { disc?: false | undefined; cb: (x: number) => void; }
disc?: false;
>disc : false | undefined
>false : false
cb: (x: number) => void;
>cb : (x: number) => void
>x : number
}
type Props = DiscriminatorTrue | DiscriminatorFalse;
>Props : DiscriminatorTrue | DiscriminatorFalse
declare function f(options: DiscriminatorTrue | DiscriminatorFalse): any;
>f : (options: DiscriminatorTrue | DiscriminatorFalse) => any
>options : DiscriminatorTrue | DiscriminatorFalse
// simple inference
f({
>f({ disc: true, cb: s => parseInt(s)}) : any
>f : (options: DiscriminatorTrue | DiscriminatorFalse) => any
>{ disc: true, cb: s => parseInt(s)} : { disc: true; cb: (s: string) => number; }
disc: true,
>disc : true
>true : true
cb: s => parseInt(s)
>cb : (s: string) => number
>s => parseInt(s) : (s: string) => number
>s : string
>parseInt(s) : number
>parseInt : (string: string, radix?: number | undefined) => number
>s : string
});
// simple inference
f({
>f({ disc: false, cb: n => n.toFixed()}) : any
>f : (options: DiscriminatorTrue | DiscriminatorFalse) => any
>{ disc: false, cb: n => n.toFixed()} : { disc: false; cb: (n: number) => string; }
disc: false,
>disc : false
>false : false
cb: n => n.toFixed()
>cb : (n: number) => string
>n => n.toFixed() : (n: number) => string
>n : number
>n.toFixed() : string
>n.toFixed : (fractionDigits?: number | undefined) => string
>n : number
>toFixed : (fractionDigits?: number | undefined) => string
});
// simple inference when strict-null-checks are enabled
f({
>f({ disc: undefined, cb: n => n.toFixed()}) : any
>f : (options: DiscriminatorTrue | DiscriminatorFalse) => any
>{ disc: undefined, cb: n => n.toFixed()} : { disc: undefined; cb: (n: number) => string; }
disc: undefined,
>disc : undefined
>undefined : undefined
cb: n => n.toFixed()
>cb : (n: number) => string
>n => n.toFixed() : (n: number) => string
>n : number
>n.toFixed() : string
>n.toFixed : (fractionDigits?: number | undefined) => string
>n : number
>toFixed : (fractionDigits?: number | undefined) => string
});
// requires checking type information since discriminator is missing from object
f({
>f({ cb: n => n.toFixed()}) : any
>f : (options: DiscriminatorTrue | DiscriminatorFalse) => any
>{ cb: n => n.toFixed()} : { cb: (n: number) => string; }
cb: n => n.toFixed()
>cb : (n: number) => string
>n => n.toFixed() : (n: number) => string
>n : number
>n.toFixed() : string
>n.toFixed : (fractionDigits?: number | undefined) => string
>n : number
>toFixed : (fractionDigits?: number | undefined) => string
});
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