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Improve isTypeParameterAtTopLevel to handle substitution types and template literal types
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128 changes: 128 additions & 0 deletions
128
tests/baselines/reference/returnTypeTopLevelInferenceLiteralDontWiden1.symbols
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,128 @@ | ||
| //// [tests/cases/compiler/returnTypeTopLevelInferenceLiteralDontWiden1.ts] //// | ||
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| === returnTypeTopLevelInferenceLiteralDontWiden1.ts === | ||
| declare function A<T>(value: T): T extends string ? T : never; | ||
| >A : Symbol(A, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 0, 0)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 0, 19)) | ||
| >value : Symbol(value, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 0, 22)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 0, 19)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 0, 19)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 0, 19)) | ||
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| const ATest = A("foo"); | ||
| >ATest : Symbol(ATest, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 2, 5)) | ||
| >A : Symbol(A, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 0, 0)) | ||
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| declare function B<T>(value: T): `test_${T & string}`; | ||
| >B : Symbol(B, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 2, 23)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 4, 19)) | ||
| >value : Symbol(value, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 4, 22)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 4, 19)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 4, 19)) | ||
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| const BTest = B("foo"); | ||
| >BTest : Symbol(BTest, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 6, 5)) | ||
| >B : Symbol(B, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 2, 23)) | ||
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| declare function C<T>( | ||
| >C : Symbol(C, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 6, 23)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 8, 19)) | ||
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| value: T, | ||
| >value : Symbol(value, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 8, 22)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 8, 19)) | ||
|
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| ): T extends string | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 8, 19)) | ||
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| ? T | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 8, 19)) | ||
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| : T extends number | bigint | boolean | null | undefined | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 8, 19)) | ||
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| ? `test_${T}` | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 8, 19)) | ||
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| : never; | ||
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| const CTest = C("foo"); | ||
| >CTest : Symbol(CTest, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 16, 5)) | ||
| >C : Symbol(C, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 6, 23)) | ||
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| declare function D<T>(value: T): T extends number ? `test_${T}` : T; | ||
| >D : Symbol(D, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 16, 23)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 18, 19)) | ||
| >value : Symbol(value, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 18, 22)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 18, 19)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 18, 19)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 18, 19)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 18, 19)) | ||
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| const DTest = D("foo"); | ||
| >DTest : Symbol(DTest, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 20, 5)) | ||
| >D : Symbol(D, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 16, 23)) | ||
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| declare function E<T>(value: T): T extends string ? `test_${T}` : T; | ||
| >E : Symbol(E, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 20, 23)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 22, 19)) | ||
| >value : Symbol(value, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 22, 22)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 22, 19)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 22, 19)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 22, 19)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 22, 19)) | ||
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| const ETest = E("foo"); | ||
| >ETest : Symbol(ETest, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 24, 5)) | ||
| >E : Symbol(E, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 20, 23)) | ||
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| declare function F<T>(value: T): T extends number ? `test_${T}` : [T]; | ||
| >F : Symbol(F, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 24, 23)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 26, 19)) | ||
| >value : Symbol(value, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 26, 22)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 26, 19)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 26, 19)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 26, 19)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 26, 19)) | ||
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| const FTest1 = F("foo"); | ||
| >FTest1 : Symbol(FTest1, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 28, 5)) | ||
| >F : Symbol(F, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 24, 23)) | ||
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| const FTest2 = F(42); | ||
| >FTest2 : Symbol(FTest2, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 29, 5)) | ||
| >F : Symbol(F, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 24, 23)) | ||
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| declare function G<T>(value: T): T extends string ? `test_${T}` : [T]; | ||
| >G : Symbol(G, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 29, 21)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 31, 19)) | ||
| >value : Symbol(value, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 31, 22)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 31, 19)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 31, 19)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 31, 19)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 31, 19)) | ||
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| const GTest1 = G("foo"); | ||
| >GTest1 : Symbol(GTest1, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 33, 5)) | ||
| >G : Symbol(G, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 29, 21)) | ||
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| const GTest2 = G(42); | ||
| >GTest2 : Symbol(GTest2, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 34, 5)) | ||
| >G : Symbol(G, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 29, 21)) | ||
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| declare function H<T>( | ||
| >H : Symbol(H, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 34, 21)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 36, 19)) | ||
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| value: T, | ||
| >value : Symbol(value, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 36, 22)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 36, 19)) | ||
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| ): T extends number ? never : `test_${T & string}`; | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 36, 19)) | ||
| >T : Symbol(T, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 36, 19)) | ||
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| const HTest = H("foo"); | ||
| >HTest : Symbol(HTest, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 40, 5)) | ||
| >H : Symbol(H, Decl(returnTypeTopLevelInferenceLiteralDontWiden1.ts, 34, 21)) | ||
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163 changes: 163 additions & 0 deletions
163
tests/baselines/reference/returnTypeTopLevelInferenceLiteralDontWiden1.types
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,163 @@ | ||
| //// [tests/cases/compiler/returnTypeTopLevelInferenceLiteralDontWiden1.ts] //// | ||
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| === returnTypeTopLevelInferenceLiteralDontWiden1.ts === | ||
| declare function A<T>(value: T): T extends string ? T : never; | ||
| >A : <T>(value: T) => T extends string ? T : never | ||
| > : ^ ^^ ^^ ^^^^^ | ||
| >value : T | ||
| > : ^ | ||
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| const ATest = A("foo"); | ||
| >ATest : "foo" | ||
| > : ^^^^^ | ||
| >A("foo") : "foo" | ||
| > : ^^^^^ | ||
| >A : <T>(value: T) => T extends string ? T : never | ||
| > : ^ ^^ ^^ ^^^^^ | ||
| >"foo" : "foo" | ||
| > : ^^^^^ | ||
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| declare function B<T>(value: T): `test_${T & string}`; | ||
| >B : <T>(value: T) => `test_${T & string}` | ||
| > : ^ ^^ ^^ ^^^^^ | ||
| >value : T | ||
| > : ^ | ||
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| const BTest = B("foo"); | ||
| >BTest : "test_foo" | ||
| > : ^^^^^^^^^^ | ||
| >B("foo") : "test_foo" | ||
| > : ^^^^^^^^^^ | ||
| >B : <T>(value: T) => `test_${T & string}` | ||
| > : ^ ^^ ^^ ^^^^^ | ||
| >"foo" : "foo" | ||
| > : ^^^^^ | ||
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| declare function C<T>( | ||
| >C : <T>(value: T) => T extends string ? T : T extends number | bigint | boolean | null | undefined ? `test_${T}` : never | ||
| > : ^ ^^ ^^ ^^^^^ | ||
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| value: T, | ||
| >value : T | ||
| > : ^ | ||
|
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| ): T extends string | ||
| ? T | ||
| : T extends number | bigint | boolean | null | undefined | ||
| ? `test_${T}` | ||
| : never; | ||
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| const CTest = C("foo"); | ||
| >CTest : "foo" | ||
| > : ^^^^^ | ||
| >C("foo") : "foo" | ||
| > : ^^^^^ | ||
| >C : <T>(value: T) => T extends string ? T : T extends number | bigint | boolean | null | undefined ? `test_${T}` : never | ||
| > : ^ ^^ ^^ ^^^^^ | ||
| >"foo" : "foo" | ||
| > : ^^^^^ | ||
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| declare function D<T>(value: T): T extends number ? `test_${T}` : T; | ||
| >D : <T>(value: T) => T extends number ? `test_${T}` : T | ||
| > : ^ ^^ ^^ ^^^^^ | ||
| >value : T | ||
| > : ^ | ||
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| const DTest = D("foo"); | ||
| >DTest : "foo" | ||
| > : ^^^^^ | ||
| >D("foo") : "foo" | ||
| > : ^^^^^ | ||
| >D : <T>(value: T) => T extends number ? `test_${T}` : T | ||
| > : ^ ^^ ^^ ^^^^^ | ||
| >"foo" : "foo" | ||
| > : ^^^^^ | ||
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| declare function E<T>(value: T): T extends string ? `test_${T}` : T; | ||
| >E : <T>(value: T) => T extends string ? `test_${T}` : T | ||
| > : ^ ^^ ^^ ^^^^^ | ||
| >value : T | ||
| > : ^ | ||
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| const ETest = E("foo"); | ||
| >ETest : "test_foo" | ||
| > : ^^^^^^^^^^ | ||
| >E("foo") : "test_foo" | ||
| > : ^^^^^^^^^^ | ||
| >E : <T>(value: T) => T extends string ? `test_${T}` : T | ||
| > : ^ ^^ ^^ ^^^^^ | ||
| >"foo" : "foo" | ||
| > : ^^^^^ | ||
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| declare function F<T>(value: T): T extends number ? `test_${T}` : [T]; | ||
| >F : <T>(value: T) => T extends number ? `test_${T}` : [T] | ||
| > : ^ ^^ ^^ ^^^^^ | ||
| >value : T | ||
| > : ^ | ||
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| const FTest1 = F("foo"); | ||
| >FTest1 : ["foo"] | ||
| > : ^^^^^^^ | ||
| >F("foo") : ["foo"] | ||
| > : ^^^^^^^ | ||
| >F : <T>(value: T) => T extends number ? `test_${T}` : [T] | ||
| > : ^ ^^ ^^ ^^^^^ | ||
| >"foo" : "foo" | ||
| > : ^^^^^ | ||
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| const FTest2 = F(42); | ||
| >FTest2 : "test_42" | ||
| > : ^^^^^^^^^ | ||
| >F(42) : "test_42" | ||
| > : ^^^^^^^^^ | ||
| >F : <T>(value: T) => T extends number ? `test_${T}` : [T] | ||
| > : ^ ^^ ^^ ^^^^^ | ||
| >42 : 42 | ||
| > : ^^ | ||
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| declare function G<T>(value: T): T extends string ? `test_${T}` : [T]; | ||
| >G : <T>(value: T) => T extends string ? `test_${T}` : [T] | ||
| > : ^ ^^ ^^ ^^^^^ | ||
| >value : T | ||
| > : ^ | ||
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| const GTest1 = G("foo"); | ||
| >GTest1 : "test_foo" | ||
| > : ^^^^^^^^^^ | ||
| >G("foo") : "test_foo" | ||
| > : ^^^^^^^^^^ | ||
| >G : <T>(value: T) => T extends string ? `test_${T}` : [T] | ||
| > : ^ ^^ ^^ ^^^^^ | ||
| >"foo" : "foo" | ||
| > : ^^^^^ | ||
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| const GTest2 = G(42); | ||
| >GTest2 : [42] | ||
| > : ^^^^ | ||
| >G(42) : [42] | ||
| > : ^^^^ | ||
| >G : <T>(value: T) => T extends string ? `test_${T}` : [T] | ||
| > : ^ ^^ ^^ ^^^^^ | ||
| >42 : 42 | ||
| > : ^^ | ||
|
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| declare function H<T>( | ||
| >H : <T>(value: T) => T extends number ? never : `test_${T & string}` | ||
| > : ^ ^^ ^^ ^^^^^ | ||
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| value: T, | ||
| >value : T | ||
| > : ^ | ||
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| ): T extends number ? never : `test_${T & string}`; | ||
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| const HTest = H("foo"); | ||
| >HTest : "test_foo" | ||
| > : ^^^^^^^^^^ | ||
| >H("foo") : "test_foo" | ||
| > : ^^^^^^^^^^ | ||
| >H : <T>(value: T) => T extends number ? never : `test_${T & string}` | ||
| > : ^ ^^ ^^ ^^^^^ | ||
| >"foo" : "foo" | ||
| > : ^^^^^ | ||
|
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44 changes: 44 additions & 0 deletions
44
tests/cases/compiler/returnTypeTopLevelInferenceLiteralDontWiden1.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| // @strict: true | ||
| // @noEmit: true | ||
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| declare function A<T>(value: T): T extends string ? T : never; | ||
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| const ATest = A("foo"); | ||
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| declare function B<T>(value: T): `test_${T & string}`; | ||
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| const BTest = B("foo"); | ||
|
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| declare function C<T>( | ||
| value: T, | ||
| ): T extends string | ||
| ? T | ||
| : T extends number | bigint | boolean | null | undefined | ||
| ? `test_${T}` | ||
| : never; | ||
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| const CTest = C("foo"); | ||
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| declare function D<T>(value: T): T extends number ? `test_${T}` : T; | ||
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| const DTest = D("foo"); | ||
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| declare function E<T>(value: T): T extends string ? `test_${T}` : T; | ||
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| const ETest = E("foo"); | ||
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| declare function F<T>(value: T): T extends number ? `test_${T}` : [T]; | ||
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| const FTest1 = F("foo"); | ||
| const FTest2 = F(42); | ||
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| declare function G<T>(value: T): T extends string ? `test_${T}` : [T]; | ||
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| const GTest1 = G("foo"); | ||
| const GTest2 = G(42); | ||
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| declare function H<T>( | ||
| value: T, | ||
| ): T extends number ? never : `test_${T & string}`; | ||
|
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| const HTest = H("foo"); |
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TODO: handle
TypeFlags.StringMappingtoo if this part of the PR turns out to be seen as a positive change too