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117 lines
4.2 KiB
C++
117 lines
4.2 KiB
C++
#pragma once
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/*
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* Copyright (c) 2013-2016, 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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#include <sqlpp11/operator/as_expression.h>
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#include <sqlpp11/column_fwd.h>
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#include <sqlpp11/detail/type_set.h>
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#include <sqlpp11/serialize.h>
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#include <sqlpp11/join.h>
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#include <sqlpp11/type_traits.h>
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namespace sqlpp
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{
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// workaround for msvc bug https://connect.microsoft.com/VisualStudio/Feedback/Details/2173198
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// template <typename AliasProvider, typename Table, typename... ColumnSpec>
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// struct table_alias_t : public member_t<ColumnSpec, column_t<AliasProvider, ColumnSpec>>...
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template <typename AliasProvider, typename Table, typename... ColumnSpec>
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struct table_alias_t : public ColumnSpec::_alias_t::template _member_t<column_t<AliasProvider, ColumnSpec>>...
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{
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using _traits = make_traits<value_type_of_t<Table>,
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tag::is_table,
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tag::is_alias,
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tag_if<tag::is_selectable, is_expression_t<Table>::value>>;
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using _nodes = detail::type_vector<>;
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using _required_ctes = required_ctes_of<Table>;
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using _provided_tables = detail::type_set<AliasProvider>;
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static_assert(required_tables_of<Table>::size::value == 0, "table aliases must not depend on external tables");
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using _alias_t = typename AliasProvider::_alias_t;
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using _column_tuple_t = std::tuple<column_t<AliasProvider, ColumnSpec>...>;
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table_alias_t(Table table) : _table(table)
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{
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}
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template <typename T>
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auto join(T t) const -> decltype(::sqlpp::join(*this, t))
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{
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return ::sqlpp::join(*this, t);
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}
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template <typename T>
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auto inner_join(T t) const -> decltype(::sqlpp::inner_join(*this, t))
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{
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return ::sqlpp::inner_join(*this, t);
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}
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template <typename T>
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auto left_outer_join(T t) const -> decltype(::sqlpp::left_outer_join(*this, t))
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{
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return ::sqlpp::left_outer_join(*this, t);
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}
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template <typename T>
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auto right_outer_join(T t) const -> decltype(::sqlpp::right_outer_join(*this, t))
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{
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return ::sqlpp::right_outer_join(*this, t);
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}
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template <typename T>
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auto outer_join(T t) const -> decltype(::sqlpp::outer_join(*this, t))
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{
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return ::sqlpp::outer_join(*this, t);
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}
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template <typename T>
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auto cross_join(T t) const -> decltype(::sqlpp::cross_join(*this, t))
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{
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return ::sqlpp::cross_join(*this, t);
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}
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Table _table;
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};
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template <typename Context, typename AliasProvider, typename Table, typename... ColumnSpec>
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Context& serialize(const table_alias_t<AliasProvider, Table, ColumnSpec...>& t, Context& context)
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{
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if (requires_parens_t<Table>::value)
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{
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context << "(";
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}
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serialize(t._table, context);
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if (requires_parens_t<Table>::value)
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{
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context << ")";
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}
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context << " AS " << name_of<table_alias_t<AliasProvider, Table, ColumnSpec...>>::template char_ptr<Context>();
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return context;
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}
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} // namespace sqlpp
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