MacOS 10.10.3, Xcode 6.3.2, Intel Composer 2015 sp 3. Compiling against 10.10 (or 10.9) SDK, including any standard header (such as <algorithm>) that eventually includes cpp_type_traits.h or allocator.h, I get the errors below if the C++ standard library is set to libc++. The errors go away if I use libstdc++:
cpp_type_traits (from OS X 10.10/usr/include/c++/4.2.1/bits/cpp_type_traits.h)
line 379: // For the immediate use, the following is a good approximation.
template<typename _Tp>
struct __is_pod <— Error: expected an identifier
{
enum
{
__value = (sizeof(__detail::__test_type<_Tp>(0))
!= sizeof(__detail::__one))
};
};
//
// A stripped-down version of std::tr1::is_empty
//
template<typename _Tp>
struct __is_empty <— Error: expected an identifier
{
private:
template<typename>
struct __first { };
template<typename _Up>
struct __second
: public _Up { };
public:
enum
{
__value = sizeof(__first<_Tp>) == sizeof(__second<_Tp>)
};
};
allocator.h
// To implement Option 3 of DR 431.
template<typename _Alloc, bool = std::__is_empty<_Alloc>::__value> <— Error : expected an identifier; the global scope has no “__value”; expected a “,” or “>”
struct __alloc_swap
{ static void _S_do_it(_Alloc&, _Alloc&) { } };
template<typename _Alloc>
struct __alloc_swap<_Alloc, false> <— Error: a template argument list is not allowed in a declaration of a primary template
{
static void
_S_do_it(_Alloc& __one, _Alloc& __two)
{
// Precondition: swappable allocators.
if (__one != __two)
swap(__one, __two);
}
};
