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sqlpp11/include/sqlpp11/interpretable_list.h
rbock 09f23cea0a Reformatted using clang-format
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/*
* 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 SQLPP_INTERPRETABLE_LIST_H
#define SQLPP_INTERPRETABLE_LIST_H
#include <vector>
#include <sqlpp11/interpretable.h>
namespace sqlpp
{
template <typename Db>
struct interpretable_list_t
{
std::vector<interpretable_t<Db>> _serializables;
std::size_t size() const
{
return _serializables.size();
}
bool empty() const
{
return _serializables.empty();
}
template <typename Expr>
void emplace_back(Expr expr)
{
_serializables.emplace_back(expr);
}
};
template <>
struct interpretable_list_t<void>
{
static constexpr std::size_t size()
{
return 0;
}
static constexpr bool empty()
{
return true;
}
};
template <typename Context, typename List>
struct serializable_list_interpreter_t
{
using T = List;
template <typename Separator>
static Context& _(const T& t, const Separator& separator, Context& context)
{
bool first = true;
for (const auto entry : t._serializables)
{
if (not first)
{
context << separator;
}
first = false;
serialize(entry, context);
}
return context;
}
};
template <typename Context>
struct serializable_list_interpreter_t<Context, interpretable_list_t<void>>
{
using T = interpretable_list_t<void>;
template <typename Separator>
static Context& _(const T&, const Separator& /* separator */, Context& context)
{
return context;
}
};
template <typename T, typename Separator, typename Context>
auto interpret_list(const T& t, const Separator& separator, Context& context)
-> decltype(serializable_list_interpreter_t<Context, T>::_(t, separator, context))
{
return serializable_list_interpreter_t<Context, T>::_(t, separator, context);
}
}
#endif