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This commit is contained in:
Anders Hejlsberg
2019-07-17 14:54:27 -07:00
parent 5a45d5aed8
commit 652bb1277c
3 changed files with 13 additions and 8 deletions
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2
tests/baselines/reference/unionAndIntersectionInference2.types
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@@ -20,7 +20,7 @@ var e1: number | string | boolean;
>e1 : string | number | boolean
f1(a1); // string
>f1(a1) : string
>f1(a1) : never
>f1 : <T>(x: string | T) => T
>a1 : string

13
tests/baselines/reference/unionTypeInference.errors.txt
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@@ -1,7 +1,8 @@
tests/cases/conformance/types/typeRelationships/typeInference/unionTypeInference.ts(9,15): error TS2345: Argument of type '2' is not assignable to parameter of type 'string | 1'.
tests/cases/conformance/types/typeRelationships/typeInference/unionTypeInference.ts(13,5): error TS2403: Subsequent variable declarations must have the same type. Variable 'a3' must be of type 'number', but here has type 'string | number'.
tests/cases/conformance/types/typeRelationships/typeInference/unionTypeInference.ts(31,5): error TS2403: Subsequent variable declarations must have the same type. Variable 'c2' must be of type 'string', but here has type 'never'.
==== tests/cases/conformance/types/typeRelationships/typeInference/unionTypeInference.ts (1 errors) ====
==== tests/cases/conformance/types/typeRelationships/typeInference/unionTypeInference.ts (2 errors) ====
// Verify that inferences made *to* a type parameter in a union type are secondary
// to inferences made directly to that type parameter
@@ -11,12 +12,13 @@ tests/cases/conformance/types/typeRelationships/typeInference/unionTypeInference
var a1: number;
var a1 = f(1, 2);
~
!!! error TS2345: Argument of type '2' is not assignable to parameter of type 'string | 1'.
var a2: number;
var a2 = f(1, "hello");
var a3: number;
var a3 = f(1, a1 || "hello");
~~
!!! error TS2403: Subsequent variable declarations must have the same type. Variable 'a3' must be of type 'number', but here has type 'string | number'.
!!! related TS6203 tests/cases/conformance/types/typeRelationships/typeInference/unionTypeInference.ts:12:5: 'a3' was also declared here.
var a4: any;
var a4 = f(undefined, "abc");
@@ -35,4 +37,7 @@ tests/cases/conformance/types/typeRelationships/typeInference/unionTypeInference
var c1 = h(5);
var c2: string;
var c2 = h("abc");
~~
!!! error TS2403: Subsequent variable declarations must have the same type. Variable 'c2' must be of type 'string', but here has type 'never'.
!!! related TS6203 tests/cases/conformance/types/typeRelationships/typeInference/unionTypeInference.ts:30:5: 'c2' was also declared here.

6
tests/baselines/reference/unionTypeInference.types
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@@ -16,7 +16,7 @@ var a1: number;
var a1 = f(1, 2);
>a1 : number
>f(1, 2) : any
>f(1, 2) : 1 | 2
>f : <T>(x: T, y: string | T) => T
>1 : 1
>2 : 2
@@ -36,7 +36,7 @@ var a3: number;
var a3 = f(1, a1 || "hello");
>a3 : number
>f(1, a1 || "hello") : number
>f(1, a1 || "hello") : number | "hello"
>f : <T>(x: T, y: string | T) => T
>1 : 1
>a1 || "hello" : number | "hello"
@@ -107,7 +107,7 @@ var c2: string;
var c2 = h("abc");
>c2 : string
>h("abc") : "abc"
>h("abc") : never
>h : <T>(x: string | boolean | T) => T
>"abc" : "abc"