Non C++17 CUDA compilation is broken when STL headers are included #2020
Description
Hello, I'm using fresh VS install (16.10.2). When I compile the following code sample everything is fine:
#include <stdio.h>
int main() {
printf("+");
return 0;
}
But STL usage:
#include <string>
int main() {
return static_cast<int>(std::string("hello").size());
}
leads to the following compilation errors
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.29.30037\include\xmemory(62): error: expected a "("
detected during:
instantiation of "size_t std::_Get_size_of_n<_Ty_size>(size_t) [with _Ty_size=16ULL]"
(839): here
instantiation of "_Ty *std::allocator<_Ty>::allocate(size_t) [with _Ty=std::_Container_proxy]"
(1321): here
instantiation of "std::_Container_proxy_ptr12<_Alloc>::_Container_proxy_ptr12(_Alloc &, std::_Container_base12 &) [with _Alloc=std::_Rebind_alloc_t<std::_Rebind_alloc_t<std::allocator<char>, char>, std::_Container_proxy>]"
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.29.30037\include\xstring(2501): here
instantiation of "std::basic_string<_Elem, _Traits, _Alloc>::basic_string(const _Elem *, std::basic_string<_Elem, _Traits, _Alloc>::size_type) [with _Elem=char, _Traits=std::char_traits<char>, _Alloc=std::allocator<char>]"
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.29.30037\include\xstring(4997): here
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.29.30037\include\xutility(131): error: expected a "("
detected during:
instantiation of "void *std::_Voidify_iter(_Iter) [with _Iter=std::_Container_proxy *]"
(158): here
instantiation of "void std::_Construct_in_place(_Ty &, _Types &&...) [with _Ty=std::_Container_proxy, _Types=<std::_Container_base12 *>]"
If I change the standard version to C++17 - everything works fine. It seems that there is an unguarded if constexpr usage in the STL.