mirror of
https://github.com/rbock/sqlpp11.git
synced 2024-11-16 04:47:18 +08:00
78 lines
2.9 KiB
C++
78 lines
2.9 KiB
C++
/*
|
|
* Copyright (c) 2013, Roland Bock
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without modification,
|
|
* are permitted provided that the following conditions are met:
|
|
*
|
|
* Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* Redistributions in binary form must reproduce the above copyright notice, this
|
|
* list of conditions and the following disclaimer in the documentation and/or
|
|
* other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
|
|
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
|
|
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef SQLPP_USING_H
|
|
#define SQLPP_USING_H
|
|
|
|
#include <ostream>
|
|
#include <sqlpp11/type_traits.h>
|
|
#include <sqlpp11/detail/set.h>
|
|
#include <sqlpp11/detail/serializable_list.h>
|
|
#include <sqlpp11/detail/serialize_tuple.h>
|
|
|
|
namespace sqlpp
|
|
{
|
|
template<typename Database, typename... Table>
|
|
struct using_t
|
|
{
|
|
using _is_using = std::true_type;
|
|
using _is_dynamic = typename std::conditional<std::is_same<Database, void>::value, std::false_type, std::true_type>::type;
|
|
|
|
static_assert(_is_dynamic::value or sizeof...(Table), "at least one table argument required in using()");
|
|
|
|
// check for duplicate arguments
|
|
static_assert(not detail::has_duplicates<Table...>::value, "at least one duplicate argument detected in using()");
|
|
|
|
// check for invalid arguments
|
|
using _valid_expressions = typename detail::make_set_if<is_table_t, Table...>::type;
|
|
static_assert(_valid_expressions::size::value == sizeof...(Table), "at least one argument is not an table in using()");
|
|
|
|
|
|
template<typename T>
|
|
void add(T&& table)
|
|
{
|
|
static_assert(is_table_t<typename std::decay<T>::type>::value, "using() arguments require to be tables");
|
|
_dynamic_tables.emplace_back(std::forward<T>(table));
|
|
}
|
|
|
|
template<typename Db>
|
|
void serialize(std::ostream& os, Db& db) const
|
|
{
|
|
if (sizeof...(Table) == 0 and _dynamic_tables.empty())
|
|
return;
|
|
os << " USING ";
|
|
detail::serialize_tuple(os, db, _tables, ',');
|
|
_dynamic_tables.serialize(os, db, sizeof...(Table) == 0);
|
|
}
|
|
|
|
std::tuple<Table...> _tables;
|
|
detail::serializable_list<Database> _dynamic_tables;
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|