You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
116 lines
4.4 KiB
116 lines
4.4 KiB
/****************************************************************************
|
|
**
|
|
** https://www.qxorm.com/
|
|
** Copyright (C) 2013 Lionel Marty (contact@qxorm.com)
|
|
**
|
|
** This file is part of the QxOrm library
|
|
**
|
|
** This software is provided 'as-is', without any express or implied
|
|
** warranty. In no event will the authors be held liable for any
|
|
** damages arising from the use of this software
|
|
**
|
|
** Commercial Usage
|
|
** Licensees holding valid commercial QxOrm licenses may use this file in
|
|
** accordance with the commercial license agreement provided with the
|
|
** Software or, alternatively, in accordance with the terms contained in
|
|
** a written agreement between you and Lionel Marty
|
|
**
|
|
** GNU General Public License Usage
|
|
** Alternatively, this file may be used under the terms of the GNU
|
|
** General Public License version 3.0 as published by the Free Software
|
|
** Foundation and appearing in the file 'license.gpl3.txt' included in the
|
|
** packaging of this file. Please review the following information to
|
|
** ensure the GNU General Public License version 3.0 requirements will be
|
|
** met : http://www.gnu.org/copyleft/gpl.html
|
|
**
|
|
** If you are unsure which license is appropriate for your use, or
|
|
** if you have questions regarding the use of this file, please contact :
|
|
** contact@qxorm.com
|
|
**
|
|
****************************************************************************/
|
|
|
|
#ifndef _QX_ENABLE_BOOST
|
|
#ifndef _QX_BOOST_OPTIONAL_ONLY_H_
|
|
#define _QX_BOOST_OPTIONAL_ONLY_H_
|
|
|
|
#ifdef _MSC_VER
|
|
#pragma once
|
|
#endif
|
|
|
|
/*!
|
|
* \file QxBoostOptionalOnly.h
|
|
* \author Lionel Marty
|
|
* \ingroup QxExtras
|
|
* \brief Provides support for boost::optional<T> to manage NULL values even if _QX_ENABLE_BOOST compilation option is not defined : so this header file enables just boost::optional feature and should be included just after <QxOrm.h> header file (ideally in a precompiled header)
|
|
*/
|
|
|
|
#include <boost/optional.hpp>
|
|
#include <boost/none.hpp>
|
|
|
|
#include <QxOrm.h>
|
|
|
|
#define _QX_ENABLE_BOOST
|
|
#include <QxSerialize/QDataStream/QxSerializeQDataStream_boost_optional.h>
|
|
#undef _QX_ENABLE_BOOST
|
|
|
|
#include <QxTraits/construct_null_qvariant.h>
|
|
|
|
QX_REGISTER_CLASS_NAME_TEMPLATE_1(boost::optional)
|
|
|
|
namespace qx {
|
|
namespace trait {
|
|
|
|
template <typename T>
|
|
struct get_sql_type< boost::optional<T> >
|
|
{ static inline const char * get() { return qx::trait::get_sql_type<T>::get(); } };
|
|
|
|
} // namespace trait
|
|
} // namespace qx
|
|
|
|
namespace qx {
|
|
namespace cvt {
|
|
namespace detail {
|
|
|
|
#ifndef _QX_NO_JSON
|
|
|
|
template <typename T> struct QxConvert_ToJson< boost::optional<T> > {
|
|
static inline QJsonValue toJson(const boost::optional<T> & t, const QString & format)
|
|
{ if (t) { return qx::cvt::to_json((* t), format); }; return QJsonValue(); } };
|
|
|
|
template <typename T> struct QxConvert_FromJson< boost::optional<T> > {
|
|
static inline qx_bool fromJson(const QJsonValue & j, boost::optional<T> & t, const QString & format)
|
|
{
|
|
if (j.isNull()) { t = boost::none; return qx_bool(true); }
|
|
else if (! t) { t = T(); }
|
|
return qx::cvt::from_json(j, (* t), format);
|
|
} };
|
|
|
|
#endif // _QX_NO_JSON
|
|
|
|
template <typename T> struct QxConvert_ToString< boost::optional<T> > {
|
|
static inline QString toString(const boost::optional<T> & t, const QString & format, int index, qx::cvt::context::ctx_type ctx)
|
|
{ if (t) { return qx::cvt::to_string((* t), format, index, ctx); }; return QString(); } };
|
|
|
|
template <typename T> struct QxConvert_FromString< boost::optional<T> > {
|
|
static inline qx_bool fromString(const QString & s, boost::optional<T> & t, const QString & format, int index, qx::cvt::context::ctx_type ctx)
|
|
{ if (! t) { t = T(); }; return qx::cvt::from_string(s, (* t), format, index, ctx); } };
|
|
|
|
template <typename T> struct QxConvert_ToVariant< boost::optional<T> > {
|
|
static inline QVariant toVariant(const boost::optional<T> & t, const QString & format, int index, qx::cvt::context::ctx_type ctx)
|
|
{ if (t) { return qx::cvt::to_variant((* t), format, index, ctx); }; return qx::trait::construct_null_qvariant<T>::get(); } };
|
|
|
|
template <typename T> struct QxConvert_FromVariant< boost::optional<T> > {
|
|
static inline qx_bool fromVariant(const QVariant & v, boost::optional<T> & t, const QString & format, int index, qx::cvt::context::ctx_type ctx)
|
|
{
|
|
if (v.isNull()) { t = boost::none; return qx_bool(true); }
|
|
else if (! t) { t = T(); }
|
|
return qx::cvt::from_variant(v, (* t), format, index, ctx);
|
|
} };
|
|
|
|
} // namespace detail
|
|
} // namespace cvt
|
|
} // namespace qx
|
|
|
|
#endif // _QX_BOOST_OPTIONAL_ONLY_H_
|
|
#endif // _QX_ENABLE_BOOST
|