/
alias_provider.h
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/
alias_provider.h
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#pragma once
/*
* Copyright (c) 2013-2016, 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.
*/
#include <type_traits>
#include <sqlpp11/char_sequence.h>
#define SQLPP_ALIAS_PROVIDER(name) \
struct name##_t \
{ \
struct _alias_t \
{ \
static constexpr const char _literal[] = #name; \
using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>; \
template <typename T> \
struct _member_t \
{ \
T name; \
T& operator()() \
{ \
return name; \
} \
const T& operator()() const \
{ \
return name; \
} \
}; \
}; \
}; \
constexpr name##_t name = {};
#define SQLPP_QUOTED_ALIAS_PROVIDER(name) \
struct name##_t \
{ \
struct _alias_t \
{ \
static constexpr const char _literal[] = "!" #name; \
using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>; \
template <typename T> \
struct _member_t \
{ \
T name; \
T& operator()() \
{ \
return name; \
} \
const T& operator()() const \
{ \
return name; \
} \
}; \
}; \
}; \
constexpr name##_t name = {};
namespace sqlpp
{
template <typename T, typename Enable = void>
struct is_alias_provider_t
{
static constexpr bool value = false;
};
template <typename T>
struct is_alias_provider_t<
T,
typename std::enable_if<std::is_class<typename T::_alias_t::template _member_t<int>>::value, void>::type>
{
static constexpr bool value = true;
};
namespace alias
{
SQLPP_ALIAS_PROVIDER(a)
SQLPP_ALIAS_PROVIDER(b)
SQLPP_ALIAS_PROVIDER(c)
SQLPP_ALIAS_PROVIDER(d)
SQLPP_ALIAS_PROVIDER(e)
SQLPP_ALIAS_PROVIDER(f)
SQLPP_ALIAS_PROVIDER(g)
SQLPP_ALIAS_PROVIDER(h)
SQLPP_ALIAS_PROVIDER(i)
SQLPP_ALIAS_PROVIDER(j)
SQLPP_ALIAS_PROVIDER(k)
SQLPP_ALIAS_PROVIDER(l)
SQLPP_ALIAS_PROVIDER(m)
SQLPP_ALIAS_PROVIDER(n)
SQLPP_ALIAS_PROVIDER(o)
SQLPP_ALIAS_PROVIDER(p)
SQLPP_ALIAS_PROVIDER(q)
SQLPP_ALIAS_PROVIDER(r)
SQLPP_ALIAS_PROVIDER(s)
SQLPP_ALIAS_PROVIDER(t)
SQLPP_ALIAS_PROVIDER(u)
SQLPP_ALIAS_PROVIDER(v)
SQLPP_ALIAS_PROVIDER(w)
SQLPP_ALIAS_PROVIDER(x)
SQLPP_ALIAS_PROVIDER(y)
SQLPP_ALIAS_PROVIDER(z)
SQLPP_ALIAS_PROVIDER(left)
SQLPP_ALIAS_PROVIDER(right)
} // namespace alias
} // namespace sqlpp