traits.h

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#ifndef GUL17_TRAITS_H_
#define GUL17_TRAITS_H_
 
#include <functional> // for std::invoke on C++17 compilers
#include <type_traits>
#include <utility>
 
#include "gul17/internal.h"
 
namespace gul17 {
 
template <typename T, typename = int>
struct IsContainerLike : std::false_type { };
 
template <typename T>
struct IsContainerLike <T,
    typename std::enable_if_t<true,
        decltype(std::declval<T>().cbegin(),
            std::declval<T>().cend(),
            std::declval<typename T::value_type>(),
            0)
    >>
    : std::true_type { };
 
template <typename T>
using remove_cvref = typename std::remove_cv<std::remove_reference_t<T>>;
 
template <typename T>
using remove_cvref_t = typename remove_cvref<T>::type;
 
 
} // namespace gul17
 
#endif
 
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