mirror of
https://github.com/rbock/sqlpp11.git
synced 2024-11-16 04:47:18 +08:00
221 lines
7.3 KiB
C++
221 lines
7.3 KiB
C++
/*
|
|
* Copyright (c) 2013-2015, 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_EXTRA_TABLES_H
|
|
#define SQLPP_EXTRA_TABLES_H
|
|
|
|
#include <sqlpp11/type_traits.h>
|
|
#include <sqlpp11/logic.h>
|
|
#include <sqlpp11/policy_update.h>
|
|
|
|
namespace sqlpp
|
|
{
|
|
template <typename... Tables>
|
|
struct extra_tables_data_t
|
|
{
|
|
extra_tables_data_t()
|
|
{
|
|
}
|
|
|
|
extra_tables_data_t(const extra_tables_data_t&) = default;
|
|
extra_tables_data_t(extra_tables_data_t&&) = default;
|
|
extra_tables_data_t& operator=(const extra_tables_data_t&) = default;
|
|
extra_tables_data_t& operator=(extra_tables_data_t&&) = default;
|
|
~extra_tables_data_t() = default;
|
|
};
|
|
|
|
// EXTRA_TABLES
|
|
template <typename... Tables>
|
|
struct extra_tables_t
|
|
{
|
|
using _traits = make_traits<no_value_t, tag::is_extra_tables>;
|
|
using _nodes = detail::type_vector<>;
|
|
using _required_ctes = detail::make_joined_set_t<required_ctes_of<Tables>...>;
|
|
using _extra_tables = detail::type_set<Tables...>;
|
|
|
|
// Data
|
|
using _data_t = extra_tables_data_t<Tables...>;
|
|
|
|
// Member implementation with data and methods
|
|
template <typename Policies>
|
|
struct _impl_t
|
|
{
|
|
// workaround for msvc bug https://connect.microsoft.com/VisualStudio/Feedback/Details/2091069
|
|
_impl_t() = default;
|
|
_impl_t(const _data_t& data) : _data(data)
|
|
{
|
|
}
|
|
|
|
_data_t _data;
|
|
};
|
|
|
|
// Base template to be inherited by the statement
|
|
template <typename Policies>
|
|
struct _base_t
|
|
{
|
|
using _data_t = extra_tables_data_t<Tables...>;
|
|
|
|
// workaround for msvc bug https://connect.microsoft.com/VisualStudio/Feedback/Details/2091069
|
|
template <typename... Args>
|
|
_base_t(Args&&... args)
|
|
: extra_tables{std::forward<Args>(args)...}
|
|
{
|
|
}
|
|
|
|
_impl_t<Policies> extra_tables;
|
|
_impl_t<Policies>& operator()()
|
|
{
|
|
return extra_tables;
|
|
}
|
|
const _impl_t<Policies>& operator()() const
|
|
{
|
|
return extra_tables;
|
|
}
|
|
|
|
template <typename T>
|
|
static auto _get_member(T t) -> decltype(t.extra_tables)
|
|
{
|
|
return t.extra_tables;
|
|
}
|
|
|
|
using _consistency_check = consistent_t;
|
|
};
|
|
};
|
|
|
|
// NO EXTRA TABLES YET
|
|
struct no_extra_tables_t
|
|
{
|
|
using _traits = make_traits<no_value_t, tag::is_noop>;
|
|
using _nodes = detail::type_vector<>;
|
|
|
|
// Data
|
|
using _data_t = no_data_t;
|
|
|
|
// Member implementation with data and methods
|
|
template <typename Policies>
|
|
struct _impl_t
|
|
{
|
|
// workaround for msvc bug https://connect.microsoft.com/VisualStudio/Feedback/Details/2091069
|
|
_impl_t() = default;
|
|
_impl_t(const _data_t& data) : _data(data)
|
|
{
|
|
}
|
|
|
|
_data_t _data;
|
|
};
|
|
|
|
// Base template to be inherited by the statement
|
|
template <typename Policies>
|
|
struct _base_t
|
|
{
|
|
using _data_t = no_data_t;
|
|
|
|
// workaround for msvc bug https://connect.microsoft.com/VisualStudio/Feedback/Details/2091069
|
|
template <typename... Args>
|
|
_base_t(Args&&... args)
|
|
: no_extra_tables{std::forward<Args>(args)...}
|
|
{
|
|
}
|
|
|
|
_impl_t<Policies> no_extra_tables;
|
|
_impl_t<Policies>& operator()()
|
|
{
|
|
return no_extra_tables;
|
|
}
|
|
const _impl_t<Policies>& operator()() const
|
|
{
|
|
return no_extra_tables;
|
|
}
|
|
|
|
template <typename T>
|
|
static auto _get_member(T t) -> decltype(t.no_extra_tables)
|
|
{
|
|
return t.no_extra_tables;
|
|
}
|
|
|
|
template <typename Check, typename T>
|
|
using _new_statement_t = new_statement_t<Check::value, Policies, no_extra_tables_t, T>;
|
|
|
|
// workaround for msvc bug https://connect.microsoft.com/VisualStudio/Feedback/Details/2173269
|
|
// template <typename... T>
|
|
// using _check = logic::all_t<is_table_t<T>::value...>;
|
|
template <typename... T>
|
|
struct _check : logic::all_t<is_table_t<T>::value...>
|
|
{
|
|
};
|
|
|
|
using _consistency_check = consistent_t;
|
|
|
|
template <typename... Tables>
|
|
auto extra_tables(Tables... tables) const -> _new_statement_t<_check<Tables...>, extra_tables_t<Tables...>>
|
|
{
|
|
static_assert(_check<Tables...>::value, "at least one argument is not a table or join in extra_tables()");
|
|
|
|
return _extra_tables_impl<void>(_check<Tables...>{}, tables...);
|
|
}
|
|
|
|
private:
|
|
template <typename Database, typename... Tables>
|
|
auto _extra_tables_impl(const std::false_type&, Tables... tables) const -> bad_statement;
|
|
|
|
template <typename Database, typename... Tables>
|
|
auto _extra_tables_impl(const std::true_type&, Tables...) const
|
|
-> _new_statement_t<std::true_type, extra_tables_t<Tables...>>
|
|
{
|
|
static_assert(required_tables_of<extra_tables_t<Tables...>>::size::value == 0,
|
|
"at least one table depends on another table in extra_tables()");
|
|
|
|
static constexpr std::size_t _number_of_tables = detail::sum(provided_tables_of<Tables>::size::value...);
|
|
using _unique_tables = detail::make_joined_set_t<provided_tables_of<Tables>...>;
|
|
// workaround for msvc bug https://connect.microsoft.com/VisualStudio/feedback/details/2173198
|
|
// using _unique_table_names = detail::transform_set_t<name_of, _unique_tables>;
|
|
using _unique_table_names = detail::make_name_of_set_t<_unique_tables>;
|
|
static_assert(_number_of_tables == _unique_tables::size::value,
|
|
"at least one duplicate table detected in extra_tables()");
|
|
static_assert(_number_of_tables == _unique_table_names::size::value,
|
|
"at least one duplicate table name detected in extra_tables()");
|
|
|
|
return {static_cast<const derived_statement_t<Policies>&>(*this), extra_tables_data_t<Tables...>{}};
|
|
}
|
|
};
|
|
};
|
|
|
|
// Interpreters
|
|
template <typename Context, typename Database, typename... Tables>
|
|
struct serializer_t<Context, extra_tables_data_t<Database, Tables...>>
|
|
{
|
|
using _serialize_check = serialize_check_of<Context, Tables...>;
|
|
using T = extra_tables_data_t<Database, Tables...>;
|
|
|
|
static Context& _(const T&, Context& context)
|
|
{
|
|
return context;
|
|
}
|
|
};
|
|
}
|
|
|
|
#endif
|