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tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameter.ts(7,7): error TS2415: Class 'D1<T, U>' incorrectly extends base class 'C3<T>'.
Types of property 'foo' are incompatible.
Type 'U' is not assignable to type 'T'.
==== tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameter.ts (1 errors) ====
// checking whether other types are subtypes of type parameters
class C3<T> {
foo: T;
}
class D1<T, U> extends C3<T> {
~~
!!! error TS2415: Class 'D1<T, U>' incorrectly extends base class 'C3<T>'.
!!! error TS2415: Types of property 'foo' are incompatible.
!!! error TS2415: Type 'U' is not assignable to type 'T'.
foo: U; // error
}
function f1<T, U>(x: T, y: U) {
var r = true ? x : y; // error
var r = true ? y : x; // error
}
interface I1 { foo: number; }
class C1 { foo: number; }
class C2<T> { foo: T; }
enum E { A }
function f() { }
module f {
export var bar = 1;
}
class c { baz: string }
module c {
export var bar = 1;
}
// errors throughout
function f2<T, U>(x: T, y: U) {
var r0 = true ? x : null;
var r0 = true ? null : x;
var u: typeof undefined;
var r0b = true ? u : x;
var r0b = true ? x : u;
var r1 = true ? 1 : x;
var r1 = true ? x : 1;
var r2 = true ? '' : x;
var r2 = true ? x : '';
var r3 = true ? true : x;
var r3 = true ? x : true;
var r4 = true ? new Date() : x;
var r4 = true ? x : new Date();
var r5 = true ? /1/ : x;
var r5 = true ? x : /1/;
var r6 = true ? { foo: 1 } : x;
var r6 = true ? x : { foo: 1 };
var r7 = true ? () => { } : x;
var r7 = true ? x : () => { };
var r8 = true ? <T>(x: T) => { return x } : x;
var r8b = true ? x : <T>(x: T) => { return x }; // type parameters not identical across declarations
var i1: I1;
var r9 = true ? i1 : x;
var r9 = true ? x : i1;
var c1: C1;
var r10 = true ? c1 : x;
var r10 = true ? x : c1;
var c2: C2<number>;
var r12 = true ? c2 : x;
var r12 = true ? x : c2;
var r13 = true ? E : x;
var r13 = true ? x : E;
var r14 = true ? E.A : x;
var r14 = true ? x : E.A;
var af: typeof f;
var r15 = true ? af : x;
var r15 = true ? x : af;
var ac: typeof c;
var r16 = true ? ac : x;
var r16 = true ? x : ac;
function f17<T>(a: T) {
var r17 = true ? x : a;
var r17 = true ? a : x;
}
function f18<T, U extends T>(a: U) {
var r18 = true ? x : a;
var r18 = true ? a : x;
}
var r19 = true ? new Object() : x; // BCT is Object
var r19 = true ? x : new Object(); // BCT is Object
var r20 = true ? {} : x; // ok
var r20 = true ? x : {}; // ok
}
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