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Utils: Add implementations for std::data and std::size 

These can be removed once C++17 is supported.
This commit is contained in:
Peter Keresztes Schmidt 2021-05-22 15:54:59 +02:00
parent b8178dbb79
commit e34b6500d9
1 changed files with 27 additions and 5 deletions
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32
src/zm_utils.h
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@ -35,7 +35,7 @@ typedef std::vector<std::string> StringVector;
std::string Trim(const std::string &str, const std::string &char_set);
inline std::string TrimSpaces(const std::string &str) { return Trim(str, " \t"); }
std::string ReplaceAll(std::string str, const std::string& old_value, const std::string& new_value);
std::string ReplaceAll(std::string str, const std::string &old_value, const std::string &new_value);
inline void StringToUpper(std::string &str) { std::transform(str.begin(), str.end(), str.begin(), ::toupper); }
StringVector Split(const std::string &str, char delim);
@ -72,32 +72,53 @@ void *sse2_aligned_memcpy(void *dest, const void *src, size_t bytes);
void touch(const char *pathname);
namespace ZM {
//! std::make_unique implementation (TODO: remove this once C++14 is supported)
// C++14 std::make_unique (TODO: remove this once C++14 is supported)
template<typename T, typename ...Args>
inline auto make_unique(Args &&...args) ->
typename std::enable_if<!std::is_array<T>::value, std::unique_ptr<T>>::type {
return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
}
template<typename T>
inline auto make_unique(std::size_t size) ->
typename std::enable_if<std::is_array<T>::value && std::extent<T>::value == 0, std::unique_ptr<T>>::type {
return std::unique_ptr<T>(new typename std::remove_extent<T>::type[size]());
}
template<typename T, typename... Args>
inline auto make_unique(Args &&...) ->
typename std::enable_if<std::extent<T>::value != 0, void>::type = delete;
// C++17 std::clamp (TODO: remove this once C++17 is supported)
template<class T, class Compare>
constexpr const T &clamp(const T &v, const T &lo, const T &hi, Compare comp) {
return comp(v, lo) ? lo : comp(hi, v) ? hi : v;
}
template<class T>
constexpr const T &clamp(const T &v, const T &lo, const T &hi) {
return ZM::clamp(v, lo, hi, std::less<T>{});
}
// C++17 std::data (TODO: remove this once C++17 is supported)
template<typename C>
constexpr auto data(C &c) -> decltype(c.data()) { return c.data(); }
template<typename C>
constexpr auto data(C const &c) -> decltype(c.data()) { return c.data(); }
template<typename T, std::size_t N>
constexpr T *data(T(&a)[N]) noexcept { return a; }
template<typename T, std::size_t N>
constexpr T const *data(const T(&a)[N]) noexcept { return a; }
template<typename T>
constexpr T const *data(std::initializer_list<T> l) noexcept { return l.begin(); }
// C++17 std::size (TODO: remove this once C++17 is supported)
template<typename C>
constexpr auto size(const C &c) -> decltype(c.size()) { return c.size(); }
template<typename T, std::size_t N>
constexpr std::size_t size(const T(&)[N]) noexcept { return N; }
}
typedef std::chrono::microseconds Microseconds;
@ -146,4 +167,5 @@ class QueryString {
std::map<std::string, std::unique_ptr<QueryParameter>> parameters_;
};
#endif // ZM_UTILS_H