flightsimulatorplatfrom/pilotclient
1
0
Fork 0
mirror of https://github.com/swift-project/pilotclient.git synced 2026-04-04 00:16:51 +08:00
Code Issues Packages Projects Releases Wiki Activity

refs #662 Work around MSVC2015 bug causing failure to detect getLogCategories() in some conditions.

Browse Source
This commit is contained in:
Mathew Sutcliffe
2016-05-25 19:25:52 +01:00
parent 3e4e49a6b6
commit fa7aa6446b
1 changed files with 16 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
src/blackmisc/typetraits.h
View File

@@ -46,6 +46,21 @@ namespace BlackMisc
struct HasToQString<T, void_t<decltype(std::declval<T>().toQString())>> : public std::true_type {};
//! \endcond
#ifdef Q_CC_MSVC // work around what seems to be an expression SFINAE bug in MSVC
namespace Private
{
struct HasGetLogCategoriesHelper
{
struct Base { int getLogCategories; };
template <typename T> struct Derived : public T, public Base {};
template <typename T, T> struct TypeCheck {};
template <typename T> static std::false_type test(TypeCheck<decltype(&Base::getLogCategories), &Derived<T>::getLogCategories> *);
template <typename T> static std::true_type test(...);
};
}
template <typename T>
using HasGetLogCategories = decltype(Private::HasGetLogCategoriesHelper::test<T>(nullptr));
#else
/*!
* Trait to detect whether a class T has a static member function named getLogCategories.
*/
@@ -55,6 +70,7 @@ namespace BlackMisc
template <typename T>
struct HasGetLogCategories<T, void_t<decltype(T::getLogCategories())>> : public std::true_type {};
//! \endcond
#endif
/*!
* Trait to detect whether a class T can be used as a key in a QHash.