original::Hashable Concept Reference

Concept checking for types that can be hashed. More...

#include <types.h>

Concept definition

template<typename T>
concept original::Hashable = 
        requires(const T& obj) {
            { std::hash<T>{}(obj) } -> std::convertible_to<std::size_t>;
        }

Detailed Description

Concept checking for types that can be hashed.

Template Parameters

T	The type to be checked

The type must satisfy the concept in this case: By having std::hash<T> specialization

namespace std {
    template<> struct hash<MyHashable1> {
        size_t operator()(const MyHashable1& obj) const {
            return std::hash<int>{}(obj.value);
        }
    };
}