mirror of
https://github.com/rbock/sqlpp11.git
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94 lines
3.1 KiB
C++
94 lines
3.1 KiB
C++
/*
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* Copyright (c) 2013-2015, 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 SQLPP11_ON_H
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#define SQLPP11_ON_H
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#include <sqlpp11/type_traits.h>
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#include <sqlpp11/interpretable_list.h>
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#include <sqlpp11/unconditional.h>
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#include <sqlpp11/logic.h>
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namespace sqlpp
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{
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SQLPP_PORTABLE_STATIC_ASSERT(assert_on_is_expression_t, "argument is not an expression in on()");
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SQLPP_PORTABLE_STATIC_ASSERT(assert_on_is_boolean_expression_t, "argument is not a boolean expression in on()");
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template <typename Expr>
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struct check_on
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{
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using type = static_combined_check_t<static_check_t<is_expression_t<Expr>::value, assert_on_is_expression_t>,
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static_check_t<is_boolean_t<Expr>::value, assert_on_is_boolean_expression_t>>;
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};
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template <typename Expr>
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using check_on_t = typename check_on<Expr>::type;
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template <typename Expression>
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struct on_t
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{
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using _traits = make_traits<no_value_t, tag::is_on>;
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using _nodes = detail::type_vector<Expression>;
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Expression _expression;
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};
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template <>
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struct on_t<unconditional_t>
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{
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using _traits = make_traits<no_value_t, tag::is_on>;
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using _nodes = detail::type_vector<>;
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};
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template <typename Context>
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struct serializer_t<Context, on_t<unconditional_t>>
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{
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using _serialize_check = consistent_t;
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using T = on_t<unconditional_t>;
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static Context& _(const T& /*unused*/, Context& context)
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{
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return context;
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}
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};
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template <typename Context, typename Expression>
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struct serializer_t<Context, on_t<Expression>>
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{
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using _serialize_check = serialize_check_of<Context, Expression>;
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using T = on_t<Expression>;
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static Context& _(const T& t, Context& context)
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{
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context << " ON ";
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serialize(t._expression, context);
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return context;
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}
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};
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} // namespace sqlpp
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#endif
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