=== tests/cases/conformance/classes/classDeclarations/classHeritageSpecification/derivedTypeDoesNotRequireExtendsClause.ts ===
class Base {
>Base : Base, Symbol(Base, Decl(derivedTypeDoesNotRequireExtendsClause.ts, 0, 0))

    foo: string;
>foo : string, Symbol(foo, Decl(derivedTypeDoesNotRequireExtendsClause.ts, 0, 12))
}

class Derived {
>Derived : Derived, Symbol(Derived, Decl(derivedTypeDoesNotRequireExtendsClause.ts, 2, 1))

    foo: string;
>foo : string, Symbol(foo, Decl(derivedTypeDoesNotRequireExtendsClause.ts, 4, 15))

    bar: number;
>bar : number, Symbol(bar, Decl(derivedTypeDoesNotRequireExtendsClause.ts, 5, 16))
}

class Derived2 extends Base {
>Derived2 : Derived2, Symbol(Derived2, Decl(derivedTypeDoesNotRequireExtendsClause.ts, 7, 1))
>Base : Base, Symbol(Base, Decl(derivedTypeDoesNotRequireExtendsClause.ts, 0, 0))

    bar: string;
>bar : string, Symbol(bar, Decl(derivedTypeDoesNotRequireExtendsClause.ts, 9, 29))
}

var b: Base;
>b : Base, Symbol(b, Decl(derivedTypeDoesNotRequireExtendsClause.ts, 13, 3))
>Base : Base, Symbol(Base, Decl(derivedTypeDoesNotRequireExtendsClause.ts, 0, 0))

var d1: Derived;
>d1 : Derived, Symbol(d1, Decl(derivedTypeDoesNotRequireExtendsClause.ts, 14, 3))
>Derived : Derived, Symbol(Derived, Decl(derivedTypeDoesNotRequireExtendsClause.ts, 2, 1))

var d2: Derived2;
>d2 : Derived2, Symbol(d2, Decl(derivedTypeDoesNotRequireExtendsClause.ts, 15, 3))
>Derived2 : Derived2, Symbol(Derived2, Decl(derivedTypeDoesNotRequireExtendsClause.ts, 7, 1))

b = d1;
>b = d1 : Derived
>b : Base, Symbol(b, Decl(derivedTypeDoesNotRequireExtendsClause.ts, 13, 3))
>d1 : Derived, Symbol(d1, Decl(derivedTypeDoesNotRequireExtendsClause.ts, 14, 3))

b = d2;
>b = d2 : Derived2
>b : Base, Symbol(b, Decl(derivedTypeDoesNotRequireExtendsClause.ts, 13, 3))
>d2 : Derived2, Symbol(d2, Decl(derivedTypeDoesNotRequireExtendsClause.ts, 15, 3))

var r: Base[] = [d1, d2];
>r : Base[], Symbol(r, Decl(derivedTypeDoesNotRequireExtendsClause.ts, 19, 3))
>Base : Base, Symbol(Base, Decl(derivedTypeDoesNotRequireExtendsClause.ts, 0, 0))
>[d1, d2] : (Derived | Derived2)[]
>d1 : Derived, Symbol(d1, Decl(derivedTypeDoesNotRequireExtendsClause.ts, 14, 3))
>d2 : Derived2, Symbol(d2, Decl(derivedTypeDoesNotRequireExtendsClause.ts, 15, 3))