==== tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations2.ts (7 errors) ====
    // String indexer providing a constraint of a user defined type
    
    class A {
        foo(): string { return ''; }
    }
    
    class B extends A {
        bar(): string { return ''; }
    }
    
    class Foo {
        [x: number]: A;
        1.0: A; // ok
        2.0: B; // ok
        "2.5": B // ok
        3.0: number; // error
        ~~~~~~~~~~~~
!!! Property '3.0' of type 'number' is not assignable to numeric index type 'A'.
        "4.0": string; // error
        ~~~~~~~~~~~~~~
!!! Property '"4.0"' of type 'string' is not assignable to numeric index type 'A'.
    }
    
    interface Foo2 {
        [x: number]: A;
        1.0: A; // ok
        2.0: B; // ok
        "2.5": B // ok
        3.0: number; // error
        ~~~~~~~~~~~~
!!! Property '3.0' of type 'number' is not assignable to numeric index type 'A'.
        "4.0": string; // error
        ~~~~~~~~~~~~~~
!!! Property '"4.0"' of type 'string' is not assignable to numeric index type 'A'.
    }
    
    var a: {
        [x: number]: A;
        1.0: A; // ok
        2.0: B; // ok
        "2.5": B // ok
        3.0: number; // error
        ~~~~~~~~~~~~
!!! Property '3.0' of type 'number' is not assignable to numeric index type 'A'.
        "4.0": string; // error
        ~~~~~~~~~~~~~~
!!! Property '"4.0"' of type 'string' is not assignable to numeric index type 'A'.
    };
    
    // error
    var b: { [x: number]: A } = {
        ~
!!! Type '{ [x: number]: {}; 1.0: A; 2.0: B; 3.0: number; "2.5": B; "4.0": string; }' is not assignable to type '{ [x: number]: A; }':
!!!   Index signatures are incompatible:
!!!     Type '{}' is not assignable to type 'A':
!!!       Property 'foo' is missing in type '{}'.
        1.0: new A(), 
        2.0: new B(), 
        "2.5": new B(),
        3.0: 1,
        "4.0": ''
    }