Comments (2)
If this is a compiler bug, could the project please document the list of supported Intel compilers?
from type_traits.
This seems like a bug in ICC, particularly the expected SFINAE in presence of sizeof(void)
doesn't take place which in this case means boost::is_complete<void>
breaks.
The below snippet reproduces what's going on. It fails to build on ICC 16, unless the fix is uncommented.
#include <boost/type_traits/is_complete.hpp>
#include <boost/type_traits/integral_constant.hpp>
#include <iostream>
/*
From https://github.com/boostorg/type_traits/blob/develop/include/boost/type_traits/is_complete.hpp#L53
*/
template <unsigned N>
struct ok_tag { double d; char c[N]; };
template <class T>
ok_tag<sizeof(T)> check_is_complete(int);
template <class T>
char check_is_complete(...);
template <class T> struct is_complete
: public boost::integral_constant<bool, ::boost::is_function<typename boost::remove_reference<T>::type>::value || (sizeof(boost::detail::check_is_complete<T>(0)) != sizeof(char))> {};
// FIX
// template <> struct is_complete<void> : public boost::false_type{};
int main(int argc, char** argv)
{
std::cout << is_complete<void>::value;
return 0;
}
A fix (hack?) is to specialize the is_complete
metafunction for void
.
from type_traits.
Related Issues (20)
- `-Wconversion` warning in `type_traits/is_complete.hpp` HOT 1
- `-Wundef` warnings in `is_mem_fun_pointer_impl.hpp` HOT 1
- Boost\libs\type_traits failed to build due to error C2338 on MSVC HOT 2
- -Wconversion warning with is_signed for enums HOT 1
- __has_trivial_assign etc. deprecated under clang 15 HOT 1
- boost::is_integral<char8_t>::value is false HOT 1
- type_traits: Deprecation warnings with clang 15 HOT 1
- more classification/traits
- is_floating_point does not contain any C++23 types HOT 1
- add/rename remove_cv_ref to (C++20 compatible) remove_cvref HOT 1
- add is_integer HOT 3
- add is_character HOT 1
- add is_number HOT 3
- add remove_cvptr HOT 1
- add is_bool HOT 3
- add is_quotrem_order HOT 2
- add is_logic HOT 2
- add is_function_pointer
- add dependent_false HOT 2
- boost::has_left_shift does not work with containers
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from type_traits.