test/Sema/128bitfloat.cpp

// RUN: %clang_cc1 -fsyntax-only -verify -std=gnu++11 %s
// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s

#if !defined(__STRICT_ANSI__)
__float128 f;  // expected-error {{support for type '__float128' is not yet implemented}}
// But this should work:
template<typename> struct __is_floating_point_helper {};
template<> struct __is_floating_point_helper<__float128> {};

// FIXME: This could have a better diag.
void g(int x, __float128 *y) {
  x + *y;  // expected-error {{invalid operands to binary expression ('int' and '__float128')}}
}

#else
__float128 f;  // expected-error {{unknown type name '__float128'}}
template<typename> struct __is_floating_point_helper {};
template<> struct __is_floating_point_helper<__float128> {};  // expected-error {{use of undeclared identifier '__float128'}}

void g(int x, __float128 *y) {  // expected-error {{unknown type name '__float128'}}
  x + *y;
}

#endif