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/**
* @file VariadicBind.h
* @ingroup SQLiteCpp
* @brief Convenience function for Statement::bind(...)
*
* Copyright (c) 2016 Paul Dreik ([email protected])
* Copyright (c) 2016-2021 Sebastien Rombauts ([email protected])
* Copyright (c) 2019 Maximilian Bachmann ([email protected])
*
* Distributed under the MIT License (MIT) (See accompanying file LICENSE.txt
* or copy at http://opensource.org/licenses/MIT)
*/
#pragma once
#include <SQLiteCpp/Statement.h>
#if (__cplusplus >= 201402L) || ( defined(_MSC_VER) && (_MSC_VER >= 1900) ) // c++14: Visual Studio 2015
#include <tuple>
#endif // c++14
/// @cond
#include <utility>
#include <initializer_list>
namespace SQLite
{
/// @endcond
/**
* \brief Convenience function for calling Statement::bind(...) once for each argument given.
*
* This takes care of incrementing the index between each calls to bind.
*
* This feature requires a c++11 capable compiler.
*
* \code{.cpp}
* SQLite::Statement stm("SELECT * FROM MyTable WHERE colA>? && colB=? && colC<?");
* SQLite::bind(stm,a,b,c);
* //...is equivalent to
* stm.bind(1,a);
* stm.bind(2,b);
* stm.bind(3,c);
* \endcode
* @param query statement
* @param args zero or more args to bind.
*/
template<class ...Args>
void bind(SQLite::Statement& query, const Args& ... args)
{
int pos = 0;
(void)std::initializer_list<int>{
((void)query.bind(++pos, std::forward<decltype(args)>(args)), 0)...
};
}
#if (__cplusplus >= 201402L) || ( defined(_MSC_VER) && (_MSC_VER >= 1900) ) // c++14: Visual Studio 2015
/**
* \brief Convenience function for calling Statement::bind(...) once for each parameter of a tuple,
* by forwarding them to the variadic template
*
* This feature requires a c++14 capable compiler.
*
* \code{.cpp}
* SQLite::Statement stm("SELECT * FROM MyTable WHERE colA>? && colB=? && colC<?");
* SQLite::bind(stm, std::make_tuple(a, b, c));
* //...is equivalent to
* stm.bind(1,a);
* stm.bind(2,b);
* stm.bind(3,c);
* \endcode
* @param query statement
* @param tuple tuple with values to bind
*/
template <typename ... Types>
void bind(SQLite::Statement& query, const std::tuple<Types...> &tuple)
{
bind(query, tuple, std::index_sequence_for<Types...>());
}
/**
* \brief Convenience function for calling Statement::bind(...) once for each parameter of a tuple,
* by forwarding them to the variadic template. This function is just needed to convert the tuples
* to parameter packs
*
* This feature requires a c++14 capable compiler.
*
* @param query statement
* @param tuple tuple with values to bind
*/
template <typename ... Types, std::size_t ... Indices>
void bind(SQLite::Statement& query, const std::tuple<Types...> &tuple, std::index_sequence<Indices...>)
{
bind(query, std::get<Indices>(tuple)...);
}
#endif // c++14
} // namespace SQLite
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