TypeScript/tests/cases/conformance/jsdoc/typeParameterExtendsUnionConstraintDistributed.ts
Wesley Wigham 367b82055c
Hoist and distribute type parameter constraints over type parameters … (#33453)
* Hoist and distribute type parameter constraints over type parameters when comparing against union targets when fetching union constraints

* Fix PR nits
2019-09-23 16:52:03 -07:00

6 lines
213 B
TypeScript

type A = 1 | 2;
function f<T extends A>(a: T): A & T { return a; } // Shouldn't error
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