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85 lines
2.7 KiB
C++
85 lines
2.7 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_TABLE_ALIAS_H
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#define SQLPP_TABLE_ALIAS_H
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#include <sqlpp11/column_fwd.h>
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#include <sqlpp11/interpret.h>
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#include <sqlpp11/type_traits.h>
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#include <sqlpp11/alias.h>
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#include <sqlpp11/detail/type_set.h>
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namespace sqlpp
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{
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struct table_alias_base_t {};
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template<typename AliasProvider, typename Table, typename... ColumnSpec>
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struct table_alias_t: public table_alias_base_t, public ColumnSpec::_name_t::template _member_t<column_t<AliasProvider, ColumnSpec>>...
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{
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//FIXME: Need to add join functionality
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using _is_table = std::true_type;
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using _table_set = detail::type_set<AliasProvider>;
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struct _value_type: Table::_value_type
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{
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using _is_expression = std::false_type;
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using _is_named_expression = copy_type_trait<Table, is_value_t>;
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using _is_alias = std::true_type;
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};
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using _name_t = typename AliasProvider::_name_t;
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using _column_tuple_t = std::tuple<column_t<Table, ColumnSpec>...>;
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table_alias_t(Table table):
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_table(table)
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{}
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Table _table;
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};
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namespace vendor
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{
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template<typename Context, typename X>
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struct serializer_t<Context, X, typename std::enable_if<std::is_base_of<table_alias_base_t, X>::value, void>::type>
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{
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using T = X;
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static Context& _(const T& t, Context& context)
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{
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context << "(";
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serialize(t._table, context);
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context << ") AS " << T::_name_t::_get_name();
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return context;
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}
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};
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}
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}
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#endif
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