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tests/cases/conformance/types/typeRelationships/typeInference/genericClassWithFunctionTypedMemberArguments.ts(57,19): error TS2453: The type argument for type parameter 'T' cannot be inferred from the usage. Consider specifying the type arguments explicitly.
Type argument candidate '1' is not a valid type argument because it is not a supertype of candidate 'T'.
tests/cases/conformance/types/typeRelationships/typeInference/genericClassWithFunctionTypedMemberArguments.ts(60,19): error TS2453: The type argument for type parameter 'T' cannot be inferred from the usage. Consider specifying the type arguments explicitly.
Type argument candidate '1' is not a valid type argument because it is not a supertype of candidate 'T'.
tests/cases/conformance/types/typeRelationships/typeInference/genericClassWithFunctionTypedMemberArguments.ts(61,20): error TS2453: The type argument for type parameter 'T' cannot be inferred from the usage. Consider specifying the type arguments explicitly.
Type argument candidate '1' is not a valid type argument because it is not a supertype of candidate 'T'.
tests/cases/conformance/types/typeRelationships/typeInference/genericClassWithFunctionTypedMemberArguments.ts(62,19): error TS2453: The type argument for type parameter 'U' cannot be inferred from the usage. Consider specifying the type arguments explicitly.
Type argument candidate '1' is not a valid type argument because it is not a supertype of candidate 'string'.
==== tests/cases/conformance/types/typeRelationships/typeInference/genericClassWithFunctionTypedMemberArguments.ts (4 errors) ====
// Generic functions used as arguments for function typed parameters are not used to make inferences from
// Using function arguments, no errors expected
module ImmediatelyFix {
class C<T> {
foo<T>(x: (a: T) => T) {
return x(null);
}
}
var c = new C<number>();
var r = c.foo(<U>(x: U) => ''); // {}
var r2 = c.foo<string>(<U>(x: U) => ''); // string
var r3 = c.foo(x => ''); // {}
class C2<T> {
foo(x: (a: T) => T) {
return x(null);
}
}
var c2 = new C2<number>();
var ra = c2.foo(<U>(x: U) => 1); // number
var r3a = c2.foo(x => 1); // number
}
module WithCandidates {
class C<T> {
foo2<T, U>(x: T, cb: (a: T) => U) {
return cb(x);
}
}
var c: C<number>;
var r4 = c.foo2(1, function <Z>(a: Z) { return '' }); // string, contextual signature instantiation is applied to generic functions
var r5 = c.foo2(1, (a) => ''); // string
var r6 = c.foo2<string, number>('', <Z>(a: Z) => 1); // number
class C2<T, U> {
foo3(x: T, cb: (a: T) => U, y: U) {
return cb(x);
}
}
var c2: C2<number, string>;
var r7 = c2.foo3(1, <Z>(a: Z) => '', ''); // string
var r8 = c2.foo3(1, function (a) { return '' }, ''); // string
class C3<T, U> {
foo3<T,U>(x: T, cb: (a: T) => U, y: U) {
return cb(x);
}
}
var c3: C3<number, string>;
function other<T, U>(t: T, u: U) {
var r10 = c.foo2(1, (x: T) => ''); // error
~~~~~~
!!! error TS2453: The type argument for type parameter 'T' cannot be inferred from the usage. Consider specifying the type arguments explicitly.
!!! error TS2453: Type argument candidate '1' is not a valid type argument because it is not a supertype of candidate 'T'.
var r10 = c.foo2(1, (x) => ''); // string
var r11 = c3.foo3(1, (x: T) => '', ''); // error
~~~~~~~
!!! error TS2453: The type argument for type parameter 'T' cannot be inferred from the usage. Consider specifying the type arguments explicitly.
!!! error TS2453: Type argument candidate '1' is not a valid type argument because it is not a supertype of candidate 'T'.
var r11b = c3.foo3(1, (x: T) => '', 1); // error
~~~~~~~
!!! error TS2453: The type argument for type parameter 'T' cannot be inferred from the usage. Consider specifying the type arguments explicitly.
!!! error TS2453: Type argument candidate '1' is not a valid type argument because it is not a supertype of candidate 'T'.
var r12 = c3.foo3(1, function (a) { return '' }, 1); // error
~~~~~~~
!!! error TS2453: The type argument for type parameter 'U' cannot be inferred from the usage. Consider specifying the type arguments explicitly.
!!! error TS2453: Type argument candidate '1' is not a valid type argument because it is not a supertype of candidate 'string'.
}
}
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