string_literal.h

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/**
 
    @file      string_literal.h
    @author    Khrapov
    @date      10.09.2021
    @copyright © Nick Khrapov, 2021. All right reserved.
 
**/
#pragma once
 
#include <qx/containers/string/string_view.h>
 
#include <algorithm>
 
namespace qx
{
 
/**
 
    @struct  string_literal
    @brief   Literal wrapper for a constant expression string
    @details Uses implicit conversion to allow templates to *seemingly*
             accept constant strings like IsAnswer<"42">()
    @tparam  T - char type
    @tparam  N - char array length
    @author  Khrapov
    @date    10.09.2021
 
**/
template<class T, size_t N>
struct string_literal
{
    constexpr string_literal(const T (&str)[N]) noexcept
    {
        std::copy_n(str, N, value);
    }
 
    static constexpr size_t size() noexcept
    {
        return N;
    }
 
    constexpr const T* data() const noexcept
    {
        return &value[0];
    }
 
    constexpr basic_string_view<T> view() const noexcept
    {
        return basic_string_view<T>(data());
    }
 
    T value[N];
};
 
} // namespace qx