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tests/cases/compiler/genericTypeWithNonGenericBaseMisMatch.ts(4,7): error TS2420: Class 'X<T>' incorrectly implements interface 'I'.
Types of property 'f' are incompatible.
Type '(a: T) => void' is not assignable to type '(a: { a: number; }) => void'.
Types of parameters 'a' and 'a' are incompatible.
Type '{ a: number; }' is not assignable to type 'T'.
tests/cases/compiler/genericTypeWithNonGenericBaseMisMatch.ts(8,5): error TS2322: Type 'X<{ a: string; }>' is not assignable to type 'I'.
Types of property 'f' are incompatible.
Type '(a: { a: string; }) => void' is not assignable to type '(a: { a: number; }) => void'.
Types of parameters 'a' and 'a' are incompatible.
Type '{ a: number; }' is not assignable to type '{ a: string; }'.
Types of property 'a' are incompatible.
Type 'number' is not assignable to type 'string'.
==== tests/cases/compiler/genericTypeWithNonGenericBaseMisMatch.ts (2 errors) ====
interface I {
f: (a: { a: number }) => void
}
class X<T extends { a: string }> implements I {
~
!!! error TS2420: Class 'X<T>' incorrectly implements interface 'I'.
!!! error TS2420: Types of property 'f' are incompatible.
!!! error TS2420: Type '(a: T) => void' is not assignable to type '(a: { a: number; }) => void'.
!!! error TS2420: Types of parameters 'a' and 'a' are incompatible.
!!! error TS2420: Type '{ a: number; }' is not assignable to type 'T'.
f(a: T): void { }
}
var x = new X<{ a: string }>();
var i: I = x; // Should not be allowed -- type of 'f' is incompatible with 'I'
~
!!! error TS2322: Type 'X<{ a: string; }>' is not assignable to type 'I'.
!!! error TS2322: Types of property 'f' are incompatible.
!!! error TS2322: Type '(a: { a: string; }) => void' is not assignable to type '(a: { a: number; }) => void'.
!!! error TS2322: Types of parameters 'a' and 'a' are incompatible.
!!! error TS2322: Type '{ a: number; }' is not assignable to type '{ a: string; }'.
!!! error TS2322: Types of property 'a' are incompatible.
!!! error TS2322: Type 'number' is not assignable to type 'string'.
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