clang/test/CXX/class.derived/class.abstract/p2.cpp

   1 // RUN: %clang_cc1 -std=c++1z -verify %s
   2
   3 // no objects of an abstract class can be created except as subobjects of a
   4 // class derived from it
   5
   6 struct A {
   7   A() {}
   8   A(int) : A() {} // ok
   9
  10   virtual void f() = 0; // expected-note 1+{{unimplemented}}
  11 };
  12
  13 void f(A &&a);
  14
  15 void g() {
  16   f({}); // expected-error {{abstract class}}
  17   f({0}); // expected-error {{abstract class}}
  18   f(0); // expected-error {{abstract class}}
  19 }
  20
  21 struct B : A {
  22   B() : A() {} // ok
  23 };