| QxOrm 1.4.7 C++ Object Relational Mapping library

- Main Page
- Modules
- Namespaces
- Classes
- Files
- Directories

- File List
- File Members

QxBoostOptionalOnly.h
Go to the documentation of this file.

    00001 /****************************************************************************
    00002 **
    00003 ** https://www.qxorm.com/
    00004 ** Copyright (C) 2013 Lionel Marty (contact@qxorm.com)
    00005 **
    00006 ** This file is part of the QxOrm library
    00007 **
    00008 ** This software is provided 'as-is', without any express or implied
    00009 ** warranty. In no event will the authors be held liable for any
    00010 ** damages arising from the use of this software
    00011 **
    00012 ** Commercial Usage
    00013 ** Licensees holding valid commercial QxOrm licenses may use this file in
    00014 ** accordance with the commercial license agreement provided with the
    00015 ** Software or, alternatively, in accordance with the terms contained in
    00016 ** a written agreement between you and Lionel Marty
    00017 **
    00018 ** GNU General Public License Usage
    00019 ** Alternatively, this file may be used under the terms of the GNU
    00020 ** General Public License version 3.0 as published by the Free Software
    00021 ** Foundation and appearing in the file 'license.gpl3.txt' included in the
    00022 ** packaging of this file. Please review the following information to
    00023 ** ensure the GNU General Public License version 3.0 requirements will be
    00024 ** met : http://www.gnu.org/copyleft/gpl.html
    00025 **
    00026 ** If you are unsure which license is appropriate for your use, or
    00027 ** if you have questions regarding the use of this file, please contact :
    00028 ** contact@qxorm.com
    00029 **
    00030 ****************************************************************************/
    00031
    00032 #ifndef _QX_ENABLE_BOOST
    00033 #ifndef _QX_BOOST_OPTIONAL_ONLY_H_
    00034 #define _QX_BOOST_OPTIONAL_ONLY_H_
    00035
    00036 #ifdef _MSC_VER
    00037 #pragma once
    00038 #endif
    00039
    00047 #include <boost/optional.hpp>
    00048 #include <boost/none.hpp>
    00049
    00050 #include <QxOrm.h>
    00051
    00052 #define _QX_ENABLE_BOOST
    00053 #include <QxSerialize/QDataStream/QxSerializeQDataStream_boost_optional.h>
    00054 #undef _QX_ENABLE_BOOST
    00055
    00056 #include <QxTraits/construct_null_qvariant.h>
    00057
    00058 QX_REGISTER_CLASS_NAME_TEMPLATE_1(boost::optional)
    00059
    00060 namespace qx {
    00061 namespace trait {
    00062
    00063 template <typename T>
    00064 struct get_sql_type< boost::optional<T> >
    00065 { static inline const char * get() { return qx::trait::get_sql_type<T>::get(); } };
    00066
    00067 } // namespace trait
    00068 } // namespace qx
    00069
    00070 namespace qx {
    00071 namespace cvt {
    00072 namespace detail {
    00073
    00074 #ifndef _QX_NO_JSON
    00075
    00076 template <typename T> struct QxConvert_ToJson< boost::optional<T> > {
    00077 static inline QJsonValue toJson(const boost::optional<T> & t, const QString & format)
    00078 { if (t) { return qx::cvt::to_json((* t), format); }; return QJsonValue(); } };
    00079
    00080 template <typename T> struct QxConvert_FromJson< boost::optional<T> > {
    00081 static inline qx_bool fromJson(const QJsonValue & j, boost::optional<T> & t, const QString & format)
    00082 {
    00083    if (j.isNull()) { t = boost::none; return qx_bool(true); }
    00084    else if (! t) { t = T(); }
    00085    return qx::cvt::from_json(j, (* t), format);
    00086 } };
    00087
    00088 #endif // _QX_NO_JSON
    00089
    00090 template <typename T> struct QxConvert_ToString< boost::optional<T> > {
    00091 static inline QString toString(const boost::optional<T> & t, const QString & format, int index, qx::cvt::context::ctx_type ctx)
    00092 { if (t) { return qx::cvt::to_string((* t), format, index, ctx); }; return QString(); } };
    00093
    00094 template <typename T> struct QxConvert_FromString< boost::optional<T> > {
    00095 static inline qx_bool fromString(const QString & s, boost::optional<T> & t, const QString & format, int index, qx::cvt::context::ctx_type ctx)
    00096 { if (! t) { t = T(); }; return qx::cvt::from_string(s, (* t), format, index, ctx); } };
    00097
    00098 template <typename T> struct QxConvert_ToVariant< boost::optional<T> > {
    00099 static inline QVariant toVariant(const boost::optional<T> & t, const QString & format, int index, qx::cvt::context::ctx_type ctx)
    00100 { if (t) { return qx::cvt::to_variant((* t), format, index, ctx); }; return qx::trait::construct_null_qvariant<T>::get(); } };
    00101
    00102 template <typename T> struct QxConvert_FromVariant< boost::optional<T> > {
    00103 static inline qx_bool fromVariant(const QVariant & v, boost::optional<T> & t, const QString & format, int index, qx::cvt::context::ctx_type ctx)
    00104 {
    00105    if (v.isNull()) { t = boost::none; return qx_bool(true); }
    00106    else if (! t) { t = T(); }
    00107    return qx::cvt::from_variant(v, (* t), format, index, ctx);
    00108 } };
    00109
    00110 } // namespace detail
    00111 } // namespace cvt
    00112 } // namespace qx
    00113
    00114 #endif // _QX_BOOST_OPTIONAL_ONLY_H_
    00115 #endif // _QX_ENABLE_BOOST