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Hoist and distribute type parameter constraints over type parameters … #33453
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weswigham
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weswigham:distribute-type-param-constraints
Sep 23, 2019
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11 changes: 11 additions & 0 deletions
11
tests/baselines/reference/typeParameterExtendsUnionConstraintDistributed.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,11 @@ | ||
| //// [typeParameterExtendsUnionConstraintDistributed.ts] | ||
| type A = 1 | 2; | ||
| function f<T extends A>(a: T): A & T { return a; } // Shouldn't error | ||
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| type B = 2 | 3; | ||
| function f2<T extends A, U extends B>(ab: T & U): (A | B) & T & U { return ab; } // Also shouldn't error | ||
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| //// [typeParameterExtendsUnionConstraintDistributed.js] | ||
| function f(a) { return a; } // Shouldn't error | ||
| function f2(ab) { return ab; } // Also shouldn't error |
32 changes: 32 additions & 0 deletions
32
tests/baselines/reference/typeParameterExtendsUnionConstraintDistributed.symbols
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,32 @@ | ||
| === tests/cases/conformance/jsdoc/typeParameterExtendsUnionConstraintDistributed.ts === | ||
| type A = 1 | 2; | ||
| >A : Symbol(A, Decl(typeParameterExtendsUnionConstraintDistributed.ts, 0, 0)) | ||
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| function f<T extends A>(a: T): A & T { return a; } // Shouldn't error | ||
| >f : Symbol(f, Decl(typeParameterExtendsUnionConstraintDistributed.ts, 0, 15)) | ||
| >T : Symbol(T, Decl(typeParameterExtendsUnionConstraintDistributed.ts, 1, 11)) | ||
| >A : Symbol(A, Decl(typeParameterExtendsUnionConstraintDistributed.ts, 0, 0)) | ||
| >a : Symbol(a, Decl(typeParameterExtendsUnionConstraintDistributed.ts, 1, 24)) | ||
| >T : Symbol(T, Decl(typeParameterExtendsUnionConstraintDistributed.ts, 1, 11)) | ||
| >A : Symbol(A, Decl(typeParameterExtendsUnionConstraintDistributed.ts, 0, 0)) | ||
| >T : Symbol(T, Decl(typeParameterExtendsUnionConstraintDistributed.ts, 1, 11)) | ||
| >a : Symbol(a, Decl(typeParameterExtendsUnionConstraintDistributed.ts, 1, 24)) | ||
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| type B = 2 | 3; | ||
| >B : Symbol(B, Decl(typeParameterExtendsUnionConstraintDistributed.ts, 1, 50)) | ||
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| function f2<T extends A, U extends B>(ab: T & U): (A | B) & T & U { return ab; } // Also shouldn't error | ||
| >f2 : Symbol(f2, Decl(typeParameterExtendsUnionConstraintDistributed.ts, 3, 15)) | ||
| >T : Symbol(T, Decl(typeParameterExtendsUnionConstraintDistributed.ts, 4, 12)) | ||
| >A : Symbol(A, Decl(typeParameterExtendsUnionConstraintDistributed.ts, 0, 0)) | ||
| >U : Symbol(U, Decl(typeParameterExtendsUnionConstraintDistributed.ts, 4, 24)) | ||
| >B : Symbol(B, Decl(typeParameterExtendsUnionConstraintDistributed.ts, 1, 50)) | ||
| >ab : Symbol(ab, Decl(typeParameterExtendsUnionConstraintDistributed.ts, 4, 38)) | ||
| >T : Symbol(T, Decl(typeParameterExtendsUnionConstraintDistributed.ts, 4, 12)) | ||
| >U : Symbol(U, Decl(typeParameterExtendsUnionConstraintDistributed.ts, 4, 24)) | ||
| >A : Symbol(A, Decl(typeParameterExtendsUnionConstraintDistributed.ts, 0, 0)) | ||
| >B : Symbol(B, Decl(typeParameterExtendsUnionConstraintDistributed.ts, 1, 50)) | ||
| >T : Symbol(T, Decl(typeParameterExtendsUnionConstraintDistributed.ts, 4, 12)) | ||
| >U : Symbol(U, Decl(typeParameterExtendsUnionConstraintDistributed.ts, 4, 24)) | ||
| >ab : Symbol(ab, Decl(typeParameterExtendsUnionConstraintDistributed.ts, 4, 38)) | ||
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17 changes: 17 additions & 0 deletions
17
tests/baselines/reference/typeParameterExtendsUnionConstraintDistributed.types
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,17 @@ | ||
| === tests/cases/conformance/jsdoc/typeParameterExtendsUnionConstraintDistributed.ts === | ||
| type A = 1 | 2; | ||
| >A : A | ||
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| function f<T extends A>(a: T): A & T { return a; } // Shouldn't error | ||
| >f : <T extends A>(a: T) => (1 & T) | (2 & T) | ||
| >a : T | ||
| >a : T | ||
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| type B = 2 | 3; | ||
| >B : B | ||
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| function f2<T extends A, U extends B>(ab: T & U): (A | B) & T & U { return ab; } // Also shouldn't error | ||
| >f2 : <T extends A, U extends B>(ab: T & U) => (1 & T & U) | (2 & T & U) | (3 & T & U) | ||
| >ab : T & U | ||
| >ab : T & U | ||
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5 changes: 5 additions & 0 deletions
5
tests/cases/conformance/jsdoc/typeParameterExtendsUnionConstraintDistributed.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,5 @@ | ||
| type A = 1 | 2; | ||
| function f<T extends A>(a: T): A & T { return a; } // Shouldn't error | ||
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| type B = 2 | 3; | ||
| function f2<T extends A, U extends B>(ab: T & U): (A | B) & T & U { return ab; } // Also shouldn't error |
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