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tests/cases/compiler/generics2.ts(17,14): error TS2344: Type 'A' does not satisfy the constraint 'B'.
Property 'b' is missing in type 'A' but required in type 'B'.
tests/cases/compiler/generics2.ts(20,9): error TS2314: Generic type 'G<T, U>' requires 2 type argument(s).
tests/cases/compiler/generics2.ts(21,9): error TS2314: Generic type 'G<T, U>' requires 2 type argument(s).
==== tests/cases/compiler/generics2.ts (3 errors) ====
interface A { a: string; }
interface B extends A { b: string; }
interface C extends B { c: string; }
interface G<T, U extends B> {
x: T;
y: U;
}
var v1: {
x: { a: string; }
y: { a: string; b: string; c: string };
}; // Ok
var v2: G<{ a: string }, C>; // Ok, equivalent to G<A, C>
var v3: G<A, A>; // Error, A not valid argument for U
~
!!! error TS2344: Type 'A' does not satisfy the constraint 'B'.
!!! error TS2344: Property 'b' is missing in type 'A' but required in type 'B'.
!!! related TS2728 tests/cases/compiler/generics2.ts:2:25: 'b' is declared here.
var v4: G<G<A, B>, C>; // Ok
var v5: G<any, any>; // Error, any does not satisfy constraint B
var v6: G<any>; // Error, wrong number of arguments
~~~~~~
!!! error TS2314: Generic type 'G<T, U>' requires 2 type argument(s).
var v7: G; // Error, no type arguments
~
!!! error TS2314: Generic type 'G<T, U>' requires 2 type argument(s).
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