mirror of
https://github.com/rbock/sqlpp11.git
synced 2024-11-15 20:31:16 +08:00
85 lines
3.3 KiB
C++
85 lines
3.3 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 SQLPP11_PARAMETER_H
|
|
#define SQLPP11_PARAMETER_H
|
|
|
|
#include <sqlpp11/type_traits.h>
|
|
#include <sqlpp11/alias_provider.h>
|
|
#include <sqlpp11/data_types/parameter_value.h>
|
|
#include <sqlpp11/expression_operators.h>
|
|
#include <sqlpp11/detail/type_set.h>
|
|
#include <sqlpp11/wrap_operand.h>
|
|
|
|
namespace sqlpp
|
|
{
|
|
template <typename ValueType, typename NameType>
|
|
struct parameter_t : public expression_operators<parameter_t<ValueType, NameType>, ValueType>
|
|
{
|
|
using _traits = make_traits<ValueType, tag::is_parameter, tag::is_expression>;
|
|
|
|
using _nodes = detail::type_vector<>;
|
|
using _parameters = detail::type_vector<parameter_t>;
|
|
using _can_be_null = std::true_type;
|
|
using _is_literal_expression = std::true_type;
|
|
|
|
using _instance_t = member_t<NameType, parameter_value_t<ValueType>>;
|
|
|
|
parameter_t() = default;
|
|
|
|
parameter_t(const parameter_t&) = default;
|
|
parameter_t(parameter_t&&) = default;
|
|
parameter_t& operator=(const parameter_t&) = default;
|
|
parameter_t& operator=(parameter_t&&) = default;
|
|
~parameter_t() = default;
|
|
};
|
|
|
|
template <typename Context, typename ValueType, typename NameType>
|
|
Context& serialize(const parameter_t<ValueType, NameType>&, Context& context)
|
|
{
|
|
context << "?";
|
|
return context;
|
|
}
|
|
|
|
template <typename NamedExpr>
|
|
auto parameter(const NamedExpr & /*unused*/) -> parameter_t<value_type_of<NamedExpr>, NamedExpr>
|
|
{
|
|
static_assert(is_selectable_t<NamedExpr>::value, "not a named expression");
|
|
return {};
|
|
}
|
|
|
|
template <typename ValueType, typename AliasProvider>
|
|
auto parameter(const ValueType& /*unused*/, const AliasProvider & /*unused*/)
|
|
-> parameter_t<wrap_operand_t<ValueType>, AliasProvider>
|
|
{
|
|
static_assert(is_value_type_t<ValueType>::value, "first argument is not a value type");
|
|
static_assert(is_alias_provider_t<AliasProvider>::value, "second argument is not an alias provider");
|
|
return {};
|
|
}
|
|
} // namespace sqlpp
|
|
|
|
#endif
|