90 lines
3 KiB
Plaintext
90 lines
3 KiB
Plaintext
=== tests/cases/conformance/types/intersection/intersectionNarrowing.ts ===
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// Repros from #43130
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function f1<T>(x: T & string | T & undefined) {
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>f1 : Symbol(f1, Decl(intersectionNarrowing.ts, 0, 0))
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>T : Symbol(T, Decl(intersectionNarrowing.ts, 2, 12))
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>x : Symbol(x, Decl(intersectionNarrowing.ts, 2, 15))
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>T : Symbol(T, Decl(intersectionNarrowing.ts, 2, 12))
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>T : Symbol(T, Decl(intersectionNarrowing.ts, 2, 12))
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if (x) {
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>x : Symbol(x, Decl(intersectionNarrowing.ts, 2, 15))
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x; // Should narrow to T & string
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>x : Symbol(x, Decl(intersectionNarrowing.ts, 2, 15))
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}
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}
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function f2<T>(x: T & string | T & undefined) {
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>f2 : Symbol(f2, Decl(intersectionNarrowing.ts, 6, 1))
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>T : Symbol(T, Decl(intersectionNarrowing.ts, 8, 12))
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>x : Symbol(x, Decl(intersectionNarrowing.ts, 8, 15))
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>T : Symbol(T, Decl(intersectionNarrowing.ts, 8, 12))
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>T : Symbol(T, Decl(intersectionNarrowing.ts, 8, 12))
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if (x !== undefined) {
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>x : Symbol(x, Decl(intersectionNarrowing.ts, 8, 15))
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>undefined : Symbol(undefined)
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x; // Should narrow to T & string
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>x : Symbol(x, Decl(intersectionNarrowing.ts, 8, 15))
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}
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else {
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x; // Should narrow to T & undefined
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>x : Symbol(x, Decl(intersectionNarrowing.ts, 8, 15))
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}
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}
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function f3<T>(x: T & string | T & number) {
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>f3 : Symbol(f3, Decl(intersectionNarrowing.ts, 15, 1))
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>T : Symbol(T, Decl(intersectionNarrowing.ts, 17, 12))
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>x : Symbol(x, Decl(intersectionNarrowing.ts, 17, 15))
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>T : Symbol(T, Decl(intersectionNarrowing.ts, 17, 12))
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>T : Symbol(T, Decl(intersectionNarrowing.ts, 17, 12))
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if (typeof x === "string") {
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>x : Symbol(x, Decl(intersectionNarrowing.ts, 17, 15))
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x; // Should narrow to T & string
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>x : Symbol(x, Decl(intersectionNarrowing.ts, 17, 15))
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}
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else {
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x; // Should narrow to T & number
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>x : Symbol(x, Decl(intersectionNarrowing.ts, 17, 15))
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}
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}
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function f4<T>(x: T & 1 | T & 2) {
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>f4 : Symbol(f4, Decl(intersectionNarrowing.ts, 24, 1))
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>T : Symbol(T, Decl(intersectionNarrowing.ts, 26, 12))
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>x : Symbol(x, Decl(intersectionNarrowing.ts, 26, 15))
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>T : Symbol(T, Decl(intersectionNarrowing.ts, 26, 12))
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>T : Symbol(T, Decl(intersectionNarrowing.ts, 26, 12))
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switch (x) {
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>x : Symbol(x, Decl(intersectionNarrowing.ts, 26, 15))
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case 1: x; break; // T & 1
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>x : Symbol(x, Decl(intersectionNarrowing.ts, 26, 15))
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case 2: x; break; // T & 2
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>x : Symbol(x, Decl(intersectionNarrowing.ts, 26, 15))
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default: x; // Should narrow to never
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>x : Symbol(x, Decl(intersectionNarrowing.ts, 26, 15))
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}
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}
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function f5<T extends string | number>(x: T & number) {
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>f5 : Symbol(f5, Decl(intersectionNarrowing.ts, 32, 1))
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>T : Symbol(T, Decl(intersectionNarrowing.ts, 34, 12))
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>x : Symbol(x, Decl(intersectionNarrowing.ts, 34, 39))
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>T : Symbol(T, Decl(intersectionNarrowing.ts, 34, 12))
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const t1 = x === "hello"; // Should be an error
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>t1 : Symbol(t1, Decl(intersectionNarrowing.ts, 35, 9))
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>x : Symbol(x, Decl(intersectionNarrowing.ts, 34, 39))
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}
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