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Simplify template type requirement checking

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This commit is contained in:
Chris Robinson
2019-05-28 08:49:53 -07:00
parent aa4b6afad6
commit 7ce2b632f5
1 changed files with 11 additions and 7 deletions
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common/albyte.h
+11 -7
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@@ -11,20 +11,22 @@ namespace al {
*/
enum class byte : unsigned char { };
template<typename T, typename std::enable_if<std::is_integral<T>::value,int>::type = 0>
#define REQUIRES(...) typename std::enable_if<(__VA_ARGS__),int>::type = 0
template<typename T, REQUIRES(std::is_integral<T>::value)>
inline constexpr T to_integer(al::byte b) noexcept { return T(b); }
template<typename T, typename std::enable_if<std::is_integral<T>::value,int>::type = 0>
template<typename T, REQUIRES(std::is_integral<T>::value)>
inline constexpr al::byte operator<<(al::byte lhs, T rhs) noexcept
{ return al::byte(to_integer<unsigned int>(lhs) << rhs); }
template<typename T, typename std::enable_if<std::is_integral<T>::value,int>::type = 0>
template<typename T, REQUIRES(std::is_integral<T>::value)>
inline constexpr al::byte operator>>(al::byte lhs, T rhs) noexcept
{ return al::byte(to_integer<unsigned int>(lhs) >> rhs); }
#define AL_DECL_OP(op) \
template<typename T, typename std::enable_if<std::is_integral<T>::value,int>::type = 0> \
template<typename T, REQUIRES(std::is_integral<T>::value)> \
inline constexpr al::byte operator op (al::byte lhs, T rhs) noexcept \
{ return al::byte(to_integer<unsigned int>(lhs) op rhs); } \
inline constexpr al::byte operator op (al::byte lhs, al::byte rhs) noexcept \
@@ -40,16 +42,16 @@ inline constexpr al::byte operator~(al::byte b) noexcept
{ return al::byte(~to_integer<unsigned int>(b)); }
template<typename T, typename std::enable_if<std::is_integral<T>::value,int>::type = 0>
template<typename T, REQUIRES(std::is_integral<T>::value)>
inline al::byte& operator<<=(al::byte &lhs, T rhs) noexcept
{ lhs = lhs << rhs; return lhs; }
template<typename T, typename std::enable_if<std::is_integral<T>::value,int>::type = 0>
template<typename T, REQUIRES(std::is_integral<T>::value)>
inline al::byte& operator>>=(al::byte &lhs, T rhs) noexcept
{ lhs = lhs >> rhs; return lhs; }
#define AL_DECL_OP(op) \
template<typename T, typename std::enable_if<std::is_integral<T>::value,int>::type = 0> \
template<typename T, REQUIRES(std::is_integral<T>::value)> \
inline al::byte& operator op##= (al::byte &lhs, T rhs) noexcept \
{ lhs = lhs op rhs; return lhs; } \
inline al::byte& operator op##= (al::byte &lhs, al::byte rhs) noexcept \
@@ -61,6 +63,8 @@ AL_DECL_OP(^)
#undef AL_DECL_OP
#undef REQUIRES
} // namespace al
#endif /* AL_BYTE_H */