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130 lines
3.7 KiB
C++
130 lines
3.7 KiB
C++
/*
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* Copyright (c) 2013-2014, Roland Bock
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SQLPP_REMOVE_H
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#define SQLPP_REMOVE_H
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#include <sqlpp11/statement.h>
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#include <sqlpp11/type_traits.h>
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#include <sqlpp11/parameter_list.h>
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#include <sqlpp11/prepared_remove.h>
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#include <sqlpp11/noop.h>
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#include <sqlpp11/from.h>
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#include <sqlpp11/extra_tables.h>
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#include <sqlpp11/using.h>
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#include <sqlpp11/where.h>
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namespace sqlpp
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{
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struct remove_name_t {};
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struct remove_t: public statement_name_t<remove_name_t>
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{
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using _traits = make_traits<no_value_t, tag::return_value>;
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struct _name_t {};
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template<typename Policies>
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struct _result_methods_t
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{
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using _statement_t = typename Policies::_statement_t;
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const _statement_t& _get_statement() const
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{
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return static_cast<const _statement_t&>(*this);
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}
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template<typename Db>
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auto _run(Db& db) const -> decltype(db.remove(this->_get_statement()))
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{
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_statement_t::_check_consistency();
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static_assert(_statement_t::_get_static_no_of_parameters() == 0, "cannot run remove directly with parameters, use prepare instead");
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return db.remove(_get_statement());
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}
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template<typename Db>
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auto _prepare(Db& db) const
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-> prepared_remove_t<Db, _statement_t>
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{
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_statement_t::_check_consistency();
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return {{}, db.prepare_remove(_get_statement())};
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}
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};
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};
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template<typename Context>
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struct serializer_t<Context, remove_name_t>
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{
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using T = remove_name_t;
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static Context& _(const T& t, Context& context)
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{
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context << "DELETE";
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return context;
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}
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};
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template<typename Database>
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using blank_remove_t = statement_t<Database,
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remove_t,
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no_from_t,
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no_using_t,
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no_extra_tables_t,
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no_where_t<true>
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>;
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auto remove()
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-> blank_remove_t<void>
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{
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return { blank_remove_t<void>() };
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}
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template<typename Table>
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auto remove_from(Table table)
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-> decltype(blank_remove_t<void>().from(table))
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{
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return { blank_remove_t<void>().from(table) };
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}
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template<typename Database>
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auto dynamic_remove(const Database&)
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-> decltype(blank_remove_t<Database>())
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{
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return { blank_remove_t<Database>() };
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}
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template<typename Database, typename Table>
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auto dynamic_remove_from(const Database&, Table table)
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-> decltype(blank_remove_t<Database>().from(table))
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{
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return { blank_remove_t<Database>().from(table) };
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}
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}
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#endif
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