124 lines
2.3 KiB
Plaintext
124 lines
2.3 KiB
Plaintext
=== tests/cases/conformance/types/typeRelationships/typeInference/unionTypeInference.ts ===
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// Verify that inferences made *to* a type parameter in a union type are secondary
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// to inferences made directly to that type parameter
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function f<T>(x: T, y: string|T): T {
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>f : <T>(x: T, y: string | T) => T
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>T : T
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>x : T
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>T : T
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>y : string | T
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>T : T
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>T : T
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return x;
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>x : T
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}
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var a1: number;
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>a1 : number
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var a1 = f(1, 2);
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>a1 : number
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>f(1, 2) : number
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>f : <T>(x: T, y: string | T) => T
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>1 : number
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>2 : number
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var a2: number;
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>a2 : number
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var a2 = f(1, "hello");
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>a2 : number
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>f(1, "hello") : number
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>f : <T>(x: T, y: string | T) => T
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>1 : number
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>"hello" : string
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var a3: number;
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>a3 : number
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var a3 = f(1, a1 || "hello");
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>a3 : number
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>f(1, a1 || "hello") : number
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>f : <T>(x: T, y: string | T) => T
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>1 : number
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>a1 || "hello" : string | number
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>a1 : number
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>"hello" : string
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var a4: any;
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>a4 : any
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var a4 = f(undefined, "abc");
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>a4 : any
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>f(undefined, "abc") : any
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>f : <T>(x: T, y: string | T) => T
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>undefined : undefined
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>"abc" : string
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function g<T>(value: [string, T]): T {
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>g : <T>(value: [string, T]) => T
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>T : T
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>value : [string, T]
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>T : T
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>T : T
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return value[1];
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>value[1] : T
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>value : [string, T]
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>1 : number
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}
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var b1: boolean;
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>b1 : boolean
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var b1 = g(["string", true]);
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>b1 : boolean
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>g(["string", true]) : boolean
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>g : <T>(value: [string, T]) => T
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>["string", true] : [string, boolean]
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>"string" : string
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>true : boolean
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function h<T>(x: string|boolean|T): T {
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>h : <T>(x: string | boolean | T) => T
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>T : T
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>x : string | boolean | T
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>T : T
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>T : T
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return typeof x === "string" || typeof x === "boolean" ? undefined : x;
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>typeof x === "string" || typeof x === "boolean" ? undefined : x : T
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>typeof x === "string" || typeof x === "boolean" : boolean
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>typeof x === "string" : boolean
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>typeof x : string
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>x : string | boolean | T
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>"string" : string
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>typeof x === "boolean" : boolean
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>typeof x : string
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>x : boolean | T
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>"boolean" : string
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>undefined : undefined
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>x : T
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}
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var c1: number;
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>c1 : number
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var c1 = h(5);
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>c1 : number
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>h(5) : number
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>h : <T>(x: string | boolean | T) => T
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>5 : number
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var c2: string;
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>c2 : string
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var c2 = h("abc");
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>c2 : string
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>h("abc") : string
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>h : <T>(x: string | boolean | T) => T
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>"abc" : string
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