string_param.hpp

/*
 Copyright 2019 Eugene Gershnik
 
 Use of this source code is governed by a BSD-style
 license that can be found in the LICENSE file or at
 https://github.com/gershnik/thinsqlitepp/blob/master/LICENSE
*/
 
#ifndef HEADER_SQLITEPP_STRING_PARAM_IFACE_INCLUDED
#define HEADER_SQLITEPP_STRING_PARAM_IFACE_INCLUDED
 
#include "config.hpp"
 
#include <string>
#include <memory>
 
namespace thinsqlitepp
{

    SQLITEPP_EXPORTED
    template<class T>
    class basic_string_param
    {
    public:
        basic_string_param(const T * str) noexcept : _str(str)
        {}

        basic_string_param(const std::basic_string<T> & str) noexcept : _str(str.c_str())
        {}

        basic_string_param(std::nullptr_t) noexcept : _str(nullptr)
        {}

        const T * c_str() const noexcept
            { return _str; }
    private:
        const T * _str;
    };

    SQLITEPP_EXPORTED using string_param = basic_string_param<char>;
 
#if __cpp_char8_t >= 201811

    SQLITEPP_EXPORTED using u8string_param = basic_string_param<char8_t>;
    
#endif

}
 
#endif