69e9bfef35
Test that `typeof x === 'random' as string`: 1. Does not issue an error. 2. Does not narrow.
97 lines
2 KiB
Plaintext
97 lines
2 KiB
Plaintext
=== tests/cases/compiler/nestedLoopTypeGuards.ts ===
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// Repros from #10378
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function f1() {
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>f1 : () => void
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var a: boolean | number | string;
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>a : string | number | boolean
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if (typeof a !== 'boolean') {
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>typeof a !== 'boolean' : boolean
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>typeof a : "string" | "number" | "boolean" | "symbol" | "undefined" | "object" | "function"
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>a : string | number | boolean
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>'boolean' : "boolean"
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// a is narrowed to "number | string"
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for (var i = 0; i < 1; i++) {
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>i : number
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>0 : 0
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>i < 1 : boolean
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>i : number
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>1 : 1
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>i++ : number
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>i : number
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for (var j = 0; j < 1; j++) {}
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>j : number
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>0 : 0
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>j < 1 : boolean
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>j : number
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>1 : 1
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>j++ : number
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>j : number
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if (typeof a === 'string') {
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>typeof a === 'string' : boolean
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>typeof a : "string" | "number" | "boolean" | "symbol" | "undefined" | "object" | "function"
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>a : string | number
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>'string' : "string"
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// a is narrowed to "string'
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for (var j = 0; j < 1; j++) {
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>j : number
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>0 : 0
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>j < 1 : boolean
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>j : number
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>1 : 1
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>j++ : number
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>j : number
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a.length; // Should not error here
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>a.length : number
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>a : string
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>length : number
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}
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}
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}
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}
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}
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function f2() {
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>f2 : () => void
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var a: string | number;
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>a : string | number
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if (typeof a === 'string') {
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>typeof a === 'string' : boolean
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>typeof a : "string" | "number" | "boolean" | "symbol" | "undefined" | "object" | "function"
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>a : string | number
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>'string' : "string"
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while (1) {
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>1 : 1
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while (1) {}
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>1 : 1
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if (typeof a === 'string') {
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>typeof a === 'string' : boolean
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>typeof a : "string" | "number" | "boolean" | "symbol" | "undefined" | "object" | "function"
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>a : string
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>'string' : "string"
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while (1) {
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>1 : 1
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a.length; // Should not error here
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>a.length : number
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>a : string
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>length : number
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}
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}
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}
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}
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}
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