112 lines
4.6 KiB
Plaintext
112 lines
4.6 KiB
Plaintext
==== tests/cases/conformance/types/objectTypeLiteral/callSignatures/typeParameterUsedAsTypeParameterConstraint4.ts (29 errors) ====
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// Type parameters are in scope in their own and other type parameter lists
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// Some negative cases
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class C<T, U extends T, V extends U> {
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~~~~~~~~~~~
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!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
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~~~~~~~~~~~
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!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
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z: W; // error
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~
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!!! Cannot find name 'W'.
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foo<W extends V>(x: W): T {
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var r: T;
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return x;
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~
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!!! Type 'W' is not assignable to type 'T'.
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}
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}
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interface I<T, U extends T, V extends U> {
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~~~~~~~~~~~
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!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
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~~~~~~~~~~~
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!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
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x: T;
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y: U;
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z: W; // error
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~
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!!! Cannot find name 'W'.
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foo<W extends V>(x: W): T;
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}
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function foo<T, U extends T>(x: T, y: U): V { // error
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~~~~~~~~~~~
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!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
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~
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!!! A function whose declared type is neither 'void' nor 'any' must return a value or consist of a single 'throw' statement.
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~
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!!! Cannot find name 'V'.
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function bar<V extends T, W extends U>(): X { // error
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~
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!!! A function whose declared type is neither 'void' nor 'any' must return a value or consist of a single 'throw' statement.
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~
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!!! Cannot find name 'X'.
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function baz<X extends W, Y extends V>(a: X, b: Y): T {
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x = y;
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~
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!!! Type 'U' is not assignable to type 'T'.
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return y;
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~
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!!! Type 'U' is not assignable to type 'T'.
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}
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}
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}
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function foo2<U extends T, T>(x: T, y: U): W { // error
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~~~~~~~~~~~
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!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
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~
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!!! A function whose declared type is neither 'void' nor 'any' must return a value or consist of a single 'throw' statement.
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~
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!!! Cannot find name 'W'.
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function bar<V extends T, W extends U>(): Y { // error
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~
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!!! A function whose declared type is neither 'void' nor 'any' must return a value or consist of a single 'throw' statement.
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~
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!!! Cannot find name 'Y'.
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function baz<X extends W, Y extends V>(a: X, b: Y): T {
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x = y;
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~
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!!! Type 'U' is not assignable to type 'T'.
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return y;
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~
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!!! Type 'U' is not assignable to type 'T'.
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}
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}
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}
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var f3 = <T, U extends T>(x: T, y: U) => {
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~~~~~~~~~~~
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!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
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function bar<V extends T, W extends U>(r: X, s: Y) { // error
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~
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!!! Cannot find name 'X'.
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~
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!!! Cannot find name 'Y'.
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var g = <X extends W, Y extends V>(a: X, b: Y): T => {
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x = y;
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~
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!!! Type 'U' is not assignable to type 'T'.
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return y;
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~
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!!! Type 'U' is not assignable to type 'T'.
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}
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}
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}
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var f4 = <U extends T, T>(x: V, y: X) => { // error
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~~~~~~~~~~~
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!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
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~
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!!! Cannot find name 'V'.
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~
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!!! Cannot find name 'X'.
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function bar<V extends T, W extends U>() {
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var g = <X extends W, Y extends V>(a: X, b: Y): T => {
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x = y;
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return y;
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}
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}
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} |