// @target: es2015
// @strict: false
// object types are identical structurally

class A {
    [x: number]: string;
}

class B {
    [x: string]: string;
}

class C<T> {
    [x: number]: T;
}

interface I {
    [x: string]: string;
}

class PA extends A {
}

class PB extends B {
}

var a: {
    [x: string]: string;
}
var b: { [x: number]: string; } = { 0: '' };

function foo1(x: A);
function foo1(x: A); // error
function foo1(x: any) { }

function foo1b(x: B);
function foo1b(x: B); // error
function foo1b(x: any) { }

function foo1c(x: C<string>);
function foo1c(x: C<string>); // error
function foo1c(x: any) { }

function foo2(x: I);
function foo2(x: I); // error
function foo2(x: any) { }

function foo3(x: typeof a);
function foo3(x: typeof a); // error
function foo3(x: any) { }

function foo4(x: typeof b);
function foo4(x: typeof b); // error
function foo4(x: any) { }

function foo5(x: A);
function foo5(x: B); // ok
function foo5(x: any) { }

function foo5b(x: A);
function foo5b(x: C<string>); // error
function foo5b(x: any) { }

function foo5c(x: A);
function foo5c(x: PA); // error
function foo5c(x: any) { }

function foo5d(x: A);
function foo5d(x: PB); // ok
function foo5d(x: any) { }

function foo6(x: A);
function foo6(x: I); // ok
function foo6(x: any) { }

function foo7(x: A);
function foo7(x: typeof a); // ok
function foo7(x: any) { }

function foo8(x: B);
function foo8(x: I); // error
function foo8(x: any) { }

function foo9(x: B);
function foo9(x: C<string>); // ok
function foo9(x: any) { }

function foo10(x: B);
function foo10(x: typeof a); // error
function foo10(x: any) { }

function foo11(x: B);
function foo11(x: typeof b); // ok
function foo11(x: any) { }

function foo11b(x: B);
function foo11b(x: PA); // ok
function foo11b(x: any) { }

function foo11c(x: B);
function foo11c(x: PB); // error
function foo11c(x: any) { }

function foo12(x: I);
function foo12(x: C<string>); // ok
function foo12(x: any) { }

function foo13(x: I);
function foo13(x: typeof a); // error
function foo13(x: any) { }

function foo14(x: I);
function foo14(x: typeof b); // ok
function foo14(x: any) { }

function foo15(x: I);
function foo15(x: PA); // ok
function foo15(x: any) { }

function foo16(x: I);
function foo16(x: PB); // error
function foo16(x: any) { }

