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QxForeach.h
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    00001 /****************************************************************************
    00002 **
    00003 ** http://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_FOREACH_H_
    00033 #define _QX_FOREACH_H_
    00034
    00035 #ifdef _MSC_VER
    00036 #pragma once
    00037 #endif
    00038
    00055 #include <boost/foreach.hpp>
    00056
    00057 #ifndef BOOST_FOREACH_ID
    00058 #define BOOST_FOREACH_ID(x) x
    00059 #endif
    00060
    00061 #include <QxTraits/is_qx_collection.h>
    00062
    00063 namespace qx {
    00064
    00065 namespace foreach {
    00066
    00067 template<typename T, typename C, bool is_qx_collection = false>
    00068 struct qx_deref_boost_or_qx
    00069 {
    00070    typedef typename boost::foreach_detail_::foreach_reference<T, C>::type type;
    00071 };
    00072
    00073 template<typename T, typename C>
    00074 struct qx_deref_boost_or_qx<T, C, true>
    00075 {
    00076    typedef typename T::type_pair_key_value::second_type type;
    00077 };
    00078
    00079 template<typename T, typename C, bool is_qx_collection = false>
    00080 struct qx_deref_deduce
    00081 {
    00082    static inline typename qx::foreach::qx_deref_boost_or_qx<T, C, false>::type
    00083    deref(boost::foreach_detail_::auto_any_t cur, boost::foreach_detail_::type2type<T, C> * ptmp)
    00084    { return boost::foreach_detail_::deref(cur, ptmp); }
    00085
    00086    static inline typename qx::foreach::qx_deref_boost_or_qx<T, C, false>::type
    00087    rderef(boost::foreach_detail_::auto_any_t cur, boost::foreach_detail_::type2type<T, C> * ptmp)
    00088    { return boost::foreach_detail_::rderef(cur, ptmp); }
    00089 };
    00090
    00091 template<typename T, typename C>
    00092 struct qx_deref_deduce<T, C, true>
    00093 {
    00094    static inline typename qx::foreach::qx_deref_boost_or_qx<T, C, true>::type
    00095    deref(boost::foreach_detail_::auto_any_t cur, boost::foreach_detail_::type2type<T, C> * ptmp)
    00096    { return boost::foreach_detail_::deref(cur, ptmp).second; }
    00097
    00098    static inline typename qx::foreach::qx_deref_boost_or_qx<T, C, true>::type
    00099    rderef(boost::foreach_detail_::auto_any_t cur, boost::foreach_detail_::type2type<T, C> * ptmp)
    00100    { return boost::foreach_detail_::rderef(cur, ptmp).second; }
    00101 };
    00102
    00103 struct qx_deref
    00104 {
    00105    template<typename T, typename C>
    00106    static inline typename qx::foreach::qx_deref_boost_or_qx<T, C, qx::trait::is_qx_collection<T>::value>::type
    00107    deref(boost::foreach_detail_::auto_any_t cur, boost::foreach_detail_::type2type<T, C> * ptmp)
    00108    { return qx::foreach::qx_deref_deduce<T, C, qx::trait::is_qx_collection<T>::value>::deref(cur, ptmp); }
    00109
    00110    template<typename T, typename C>
    00111    static inline typename qx::foreach::qx_deref_boost_or_qx<T, C, qx::trait::is_qx_collection<T>::value>::type
    00112    deref_reverse(boost::foreach_detail_::auto_any_t cur, boost::foreach_detail_::type2type<T, C> * ptmp)
    00113    { return qx::foreach::qx_deref_deduce<T, C, qx::trait::is_qx_collection<T>::value>::rderef(cur, ptmp); }
    00114 };
    00115
    00116 } // namespace foreach
    00117
    00118 } // namespace qx
    00119
    00120 #define QX_FOREACH_DEREF(COL) \
    00121    qx::foreach::qx_deref::deref(BOOST_FOREACH_ID(_foreach_cur), BOOST_FOREACH_TYPEOF(COL))
    00122
    00123 #define QX_FOREACH_DEREF_REVERSE(COL) \
    00124    qx::foreach::qx_deref::deref_reverse(BOOST_FOREACH_ID(_foreach_cur), BOOST_FOREACH_TYPEOF(COL))
    00125
    00126 #define QX_FOREACH(VAR, COL)                                                                    \
    00127    BOOST_FOREACH_PREAMBLE()                                                                     \
    00128    if (boost::foreach_detail_::auto_any_t BOOST_FOREACH_ID(_foreach_col) = BOOST_FOREACH_CONTAIN(COL)) {} else    \
    00129    if (boost::foreach_detail_::auto_any_t BOOST_FOREACH_ID(_foreach_cur) = BOOST_FOREACH_BEGIN(COL)) {} else      \
    00130    if (boost::foreach_detail_::auto_any_t BOOST_FOREACH_ID(_foreach_end) = BOOST_FOREACH_END(COL)) {} else        \
    00131    for (bool BOOST_FOREACH_ID(_foreach_continue) = true;                                                          \
    00132          BOOST_FOREACH_ID(_foreach_continue) && !BOOST_FOREACH_DONE(COL);                                         \
    00133          BOOST_FOREACH_ID(_foreach_continue) ? BOOST_FOREACH_NEXT(COL) : (void)0)                                 \
    00134       if  (boost::foreach_detail_::set_false(BOOST_FOREACH_ID(_foreach_continue))) {} else                        \
    00135       for (VAR = QX_FOREACH_DEREF(COL); !BOOST_FOREACH_ID(_foreach_continue); BOOST_FOREACH_ID(_foreach_continue) = true)
    00136
    00137 #define QX_FOREACH_REVERSE(VAR, COL)                                                            \
    00138    BOOST_FOREACH_PREAMBLE()                                                                     \
    00139    if (boost::foreach_detail_::auto_any_t BOOST_FOREACH_ID(_foreach_col) = BOOST_FOREACH_CONTAIN(COL)) {} else    \
    00140    if (boost::foreach_detail_::auto_any_t BOOST_FOREACH_ID(_foreach_cur) = BOOST_FOREACH_RBEGIN(COL)) {} else     \
    00141    if (boost::foreach_detail_::auto_any_t BOOST_FOREACH_ID(_foreach_end) = BOOST_FOREACH_REND(COL)) {} else       \
    00142    for (bool BOOST_FOREACH_ID(_foreach_continue) = true;                                                          \
    00143          BOOST_FOREACH_ID(_foreach_continue) && !BOOST_FOREACH_RDONE(COL);                                        \
    00144          BOOST_FOREACH_ID(_foreach_continue) ? BOOST_FOREACH_RNEXT(COL) : (void)0)                                \
    00145       if  (boost::foreach_detail_::set_false(BOOST_FOREACH_ID(_foreach_continue))) {} else                        \
    00146       for (VAR = QX_FOREACH_DEREF_REVERSE(COL); !BOOST_FOREACH_ID(_foreach_continue); BOOST_FOREACH_ID(_foreach_continue) = true)
    00147
    00148 #ifdef _foreach
    00149 #undef _foreach
    00150 #endif // _foreach
    00151
    00152 #ifdef _foreach_reverse
    00153 #undef _foreach_reverse
    00154 #endif // _foreach_reverse
    00155
    00156 #ifdef _foreach_if
    00157 #undef _foreach_if
    00158 #endif // _foreach_if
    00159
    00160 #ifdef _foreach_reverse_if
    00161 #undef _foreach_reverse_if
    00162 #endif // _foreach_reverse_if
    00163
    00164 #define _foreach QX_FOREACH
    00165 #define _foreach_reverse QX_FOREACH_REVERSE
    00166
    00167 #define _foreach_if(VAR, COL, COND) _foreach(VAR, COL) if (COND)
    00168 #define _foreach_reverse_if(VAR, COL, COND) _foreach_reverse(VAR, COL) if (COND)
    00169
    00170 #endif // _QX_FOREACH_H_