On Thu, Feb 26, 2015 at 11:13 AM, Joaquin M Lopez Munoz <joaquin@tid.es> wrote:
Marcel Raad <raad <at> teamviewer.com> writes:
Ben Pope <benpope81 <at> gmail.com> writes:
multi_index:test_key_extractors:msvc-14.0
This I strongly suspect is a compiler bug. I've tried reducing the problem to a simple test case but it works in webcompiler.cloudapp.net with version 19.00.22620:
#include <type_traits>
template<bool Cond,typename T1,typename T2> struct if_{using type=T1;};
template<typename T1,typename T2> struct if_<false,T1,T2>{using type=T2;};
template<class Class,typename Type,Type Class::*PtrToMember> struct const_member_base{using result_type=Type;};
template<class Class,typename Type,Type Class::*PtrToMember> struct non_const_member_base{using result_type=Type;};
template<class Class,typename Type,Type Class::*PtrToMember> struct member: if_< std::is_const<Type>::value, const_member_base<Class,Type,PtrToMember>, non_const_member_base<Class,Type,PtrToMember>
::type { };
struct X { int x; };
int main() { member<X,const int,&X::x> t; }
Maybe someone can try with version 19.00.22609, which is what teeks99-08f-win2012R2-64on64 is running? If it fails, then we have a compiler bug fixed on mainline.
I ran it on that same machine (with 19.00.22609) and it gave the following error. Tom 1>------ Build started: Project: ComplierBugTest, Configuration: Debug Win32 ------ 1> main.cpp 1>c:\users\boost\documents\visual studio 2015\projects\complierbugtest\main.cpp(19): error C2975: 'PtrToMember': invalid template argument for 'const_member_base', expected compile-time constant expression 1> c:\users\boost\documents\visual studio 2015\projects\complierbugtest\main.cpp(9): note: see declaration of 'PtrToMember' 1> c:\users\boost\documents\visual studio 2015\projects\complierbugtest\main.cpp(32): note: see reference to class template instantiation 'member<X,const int,pointer-to-member(0x0)>' being compiled 1>c:\users\boost\documents\visual studio 2015\projects\complierbugtest\main.cpp(20): error C2975: 'PtrToMember': invalid template argument for 'non_const_member_base', expected compile-time constant expression 1> c:\users\boost\documents\visual studio 2015\projects\complierbugtest\main.cpp(12): note: see declaration of 'PtrToMember' ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========