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Improve the ArraySize function a bit now that c++11 isn't forbidden there. Error messages should be friendlier now.

This commit is contained in:
Jordan Woyak 2013-09-12 12:57:13 -05:00
parent 0fc1ca0169
commit ef1d33647f
1 changed files with 7 additions and 8 deletions
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15
Source/Core/Common/Src/CommonFuncs.h
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@ -13,16 +13,15 @@
#endif
#include <cstddef>
// TODO: make into function when type_traits and constexpr are available
template <typename T, std::size_t N = 0>
struct ArraySizeImpl {};
template <typename T, std::size_t N>
struct ArraySizeImpl<T[N], 0> { static const std::size_t size = N; };
#include <type_traits>
// Will fail to compile on a non-array:
#define ArraySize(x) ArraySizeImpl<decltype(x)>::size
// TODO: make this a function when constexpr is available
template <typename T>
struct ArraySizeImpl : public std::extent<T>
{ static_assert(std::is_array<T>::value, "is array"); };
#define ArraySize(x) ArraySizeImpl<decltype(x)>::value
#define b2(x) ( (x) | ( (x) >> 1) )
#define b4(x) ( b2(x) | ( b2(x) >> 2) )