126 lines
No EOL
4.1 KiB
Text
126 lines
No EOL
4.1 KiB
Text
==== tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithConstraints4.ts (18 errors) ====
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// checking whether other types are subtypes of type parameters with constraints
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class Foo { foo: number; }
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function f<T extends Foo, U extends Foo, V>(t: T, u: U, v: V) {
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// error
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var r = true ? t : u;
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~~~~~~~~~~~~
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!!! No best common type exists between 'T' and 'U'.
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var r = true ? u : t;
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~~~~~~~~~~~~
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!!! No best common type exists between 'U' and 'T'.
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// error
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var r2 = true ? t : v;
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~~~~~~~~~~~~
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!!! No best common type exists between 'T' and 'V'.
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var r2 = true ? v : t;
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~~~~~~~~~~~~
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!!! No best common type exists between 'V' and 'T'.
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// error
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var r3 = true ? v : u;
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~~~~~~~~~~~~
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!!! No best common type exists between 'V' and 'U'.
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var r3 = true ? u : v;
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~~~~~~~~~~~~
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!!! No best common type exists between 'U' and 'V'.
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// ok
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var r4 = true ? t : new Foo();
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var r4 = true ? new Foo() : t;
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// ok
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var r5 = true ? u : new Foo();
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var r5 = true ? new Foo() : u;
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// BUG, should be error
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var r6 = true ? v : new Foo();
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~~~~~~~~~~~~~~~~~~~~
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!!! No best common type exists between 'V' and 'Foo'.
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var r6 = true ? new Foo() : v;
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~~~~~~~~~~~~~~~~~~~~
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!!! No best common type exists between 'Foo' and 'V'.
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}
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class B1<T> {
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foo: T;
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}
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class D1<T extends Foo, U extends Foo, V> extends B1<Foo> {
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[x: string]: Foo;
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foo: T; // ok
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}
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class D2<T extends Foo, U extends Foo, V> extends B1<Foo> {
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[x: string]: Foo;
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foo: U; // ok
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}
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class D3<T extends Foo, U extends Foo, V> extends B1<Foo> {
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~~
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!!! Class 'D3<T, U, V>' incorrectly extends base class 'B1<Foo>':
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!!! Types of property 'foo' are incompatible:
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!!! Type 'V' is not assignable to type 'Foo':
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!!! Property 'foo' is missing in type '{}'.
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[x: string]: Foo;
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foo: V; // error
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~~~~~~~
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!!! Property 'foo' of type 'V' is not assignable to string index type 'Foo'.
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}
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class D4<T extends Foo, U extends Foo, V> extends B1<T> {
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[x: string]: T;
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foo: T; // ok
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}
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class D5<T extends Foo, U extends Foo, V> extends B1<T> {
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~~
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!!! Class 'D5<T, U, V>' incorrectly extends base class 'B1<T>':
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!!! Types of property 'foo' are incompatible:
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!!! Type 'U' is not assignable to type 'T'.
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[x: string]: T;
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foo: U; // error
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~~~~~~~
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!!! Property 'foo' of type 'U' is not assignable to string index type 'T'.
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}
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class D6<T extends Foo, U extends Foo, V> extends B1<T> {
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~~
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!!! Class 'D6<T, U, V>' incorrectly extends base class 'B1<T>':
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!!! Types of property 'foo' are incompatible:
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!!! Type 'V' is not assignable to type 'T'.
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[x: string]: T;
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foo: V; // error
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~~~~~~~
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!!! Property 'foo' of type 'V' is not assignable to string index type 'T'.
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}
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class D7<T extends Foo, U extends Foo, V> extends B1<U> {
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~~
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!!! Class 'D7<T, U, V>' incorrectly extends base class 'B1<U>':
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!!! Types of property 'foo' are incompatible:
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!!! Type 'T' is not assignable to type 'U'.
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[x: string]: U;
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foo: T; // error
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~~~~~~~
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!!! Property 'foo' of type 'T' is not assignable to string index type 'U'.
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}
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class D8<T extends Foo, U extends Foo, V> extends B1<U> {
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[x: string]: U;
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foo: U; // ok
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}
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class D9<T extends Foo, U extends Foo, V> extends B1<U> {
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~~
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!!! Class 'D9<T, U, V>' incorrectly extends base class 'B1<U>':
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!!! Types of property 'foo' are incompatible:
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!!! Type 'V' is not assignable to type 'U'.
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[x: string]: U;
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foo: V; // error
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~~~~~~~
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!!! Property 'foo' of type 'V' is not assignable to string index type 'U'.
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} |