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QxForeach.h
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    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 #ifdef _QX_ENABLE_BOOST
    00033 #ifndef _QX_FOREACH_H_
    00034 #define _QX_FOREACH_H_
    00035
    00036 #ifdef _MSC_VER
    00037 #pragma once
    00038 #endif
    00039
    00056 #include <boost/foreach.hpp>
    00057
    00058 #ifndef BOOST_FOREACH_ID
    00059 #define BOOST_FOREACH_ID(x) x
    00060 #endif
    00061
    00062 #include <QxTraits/is_qx_collection.h>
    00063
    00064 namespace qx {
    00065
    00066 namespace foreach {
    00067
    00068 template<typename T, typename C, bool is_qx_collection = false>
    00069 struct qx_deref_boost_or_qx
    00070 {
    00071    typedef typename boost::foreach_detail_::foreach_reference<T, C>::type type;
    00072 };
    00073
    00074 template<typename T, typename C>
    00075 struct qx_deref_boost_or_qx<T, C, true>
    00076 {
    00077    typedef typename T::type_pair_key_value::second_type type;
    00078 };
    00079
    00080 template<typename T, typename C, bool is_qx_collection = false>
    00081 struct qx_deref_deduce
    00082 {
    00083    static inline typename qx::foreach::qx_deref_boost_or_qx<T, C, false>::type
    00084    deref(boost::foreach_detail_::auto_any_t cur, boost::foreach_detail_::type2type<T, C> * ptmp)
    00085    { return boost::foreach_detail_::deref(cur, ptmp); }
    00086
    00087    static inline typename qx::foreach::qx_deref_boost_or_qx<T, C, false>::type
    00088    rderef(boost::foreach_detail_::auto_any_t cur, boost::foreach_detail_::type2type<T, C> * ptmp)
    00089    { return boost::foreach_detail_::rderef(cur, ptmp); }
    00090 };
    00091
    00092 template<typename T, typename C>
    00093 struct qx_deref_deduce<T, C, true>
    00094 {
    00095    static inline typename qx::foreach::qx_deref_boost_or_qx<T, C, true>::type
    00096    deref(boost::foreach_detail_::auto_any_t cur, boost::foreach_detail_::type2type<T, C> * ptmp)
    00097    { return boost::foreach_detail_::deref(cur, ptmp).second; }
    00098
    00099    static inline typename qx::foreach::qx_deref_boost_or_qx<T, C, true>::type
    00100    rderef(boost::foreach_detail_::auto_any_t cur, boost::foreach_detail_::type2type<T, C> * ptmp)
    00101    { return boost::foreach_detail_::rderef(cur, ptmp).second; }
    00102 };
    00103
    00104 struct qx_deref
    00105 {
    00106    template<typename T, typename C>
    00107    static inline typename qx::foreach::qx_deref_boost_or_qx<T, C, qx::trait::is_qx_collection<T>::value>::type
    00108    deref(boost::foreach_detail_::auto_any_t cur, boost::foreach_detail_::type2type<T, C> * ptmp)
    00109    { return qx::foreach::qx_deref_deduce<T, C, qx::trait::is_qx_collection<T>::value>::deref(cur, ptmp); }
    00110
    00111    template<typename T, typename C>
    00112    static inline typename qx::foreach::qx_deref_boost_or_qx<T, C, qx::trait::is_qx_collection<T>::value>::type
    00113    deref_reverse(boost::foreach_detail_::auto_any_t cur, boost::foreach_detail_::type2type<T, C> * ptmp)
    00114    { return qx::foreach::qx_deref_deduce<T, C, qx::trait::is_qx_collection<T>::value>::rderef(cur, ptmp); }
    00115 };
    00116
    00117 } // namespace foreach
    00118
    00119 } // namespace qx
    00120
    00121 #define QX_FOREACH_DEREF(COL) \
    00122    qx::foreach::qx_deref::deref(BOOST_FOREACH_ID(_foreach_cur), BOOST_FOREACH_TYPEOF(COL))
    00123
    00124 #define QX_FOREACH_DEREF_REVERSE(COL) \
    00125    qx::foreach::qx_deref::deref_reverse(BOOST_FOREACH_ID(_foreach_cur), BOOST_FOREACH_TYPEOF(COL))
    00126
    00127 #define QX_FOREACH(VAR, COL)                                                                    \
    00128    BOOST_FOREACH_PREAMBLE()                                                                     \
    00129    if (boost::foreach_detail_::auto_any_t BOOST_FOREACH_ID(_foreach_col) = BOOST_FOREACH_CONTAIN(COL)) {} else    \
    00130    if (boost::foreach_detail_::auto_any_t BOOST_FOREACH_ID(_foreach_cur) = BOOST_FOREACH_BEGIN(COL)) {} else      \
    00131    if (boost::foreach_detail_::auto_any_t BOOST_FOREACH_ID(_foreach_end) = BOOST_FOREACH_END(COL)) {} else        \
    00132    for (bool BOOST_FOREACH_ID(_foreach_continue) = true;                                                          \
    00133          BOOST_FOREACH_ID(_foreach_continue) && !BOOST_FOREACH_DONE(COL);                                         \
    00134          BOOST_FOREACH_ID(_foreach_continue) ? BOOST_FOREACH_NEXT(COL) : (void)0)                                 \
    00135       if  (boost::foreach_detail_::set_false(BOOST_FOREACH_ID(_foreach_continue))) {} else                        \
    00136       for (VAR = QX_FOREACH_DEREF(COL); !BOOST_FOREACH_ID(_foreach_continue); BOOST_FOREACH_ID(_foreach_continue) = true)
    00137
    00138 #define QX_FOREACH_REVERSE(VAR, COL)                                                            \
    00139    BOOST_FOREACH_PREAMBLE()                                                                     \
    00140    if (boost::foreach_detail_::auto_any_t BOOST_FOREACH_ID(_foreach_col) = BOOST_FOREACH_CONTAIN(COL)) {} else    \
    00141    if (boost::foreach_detail_::auto_any_t BOOST_FOREACH_ID(_foreach_cur) = BOOST_FOREACH_RBEGIN(COL)) {} else     \
    00142    if (boost::foreach_detail_::auto_any_t BOOST_FOREACH_ID(_foreach_end) = BOOST_FOREACH_REND(COL)) {} else       \
    00143    for (bool BOOST_FOREACH_ID(_foreach_continue) = true;                                                          \
    00144          BOOST_FOREACH_ID(_foreach_continue) && !BOOST_FOREACH_RDONE(COL);                                        \
    00145          BOOST_FOREACH_ID(_foreach_continue) ? BOOST_FOREACH_RNEXT(COL) : (void)0)                                \
    00146       if  (boost::foreach_detail_::set_false(BOOST_FOREACH_ID(_foreach_continue))) {} else                        \
    00147       for (VAR = QX_FOREACH_DEREF_REVERSE(COL); !BOOST_FOREACH_ID(_foreach_continue); BOOST_FOREACH_ID(_foreach_continue) = true)
    00148
    00149 #ifdef _foreach
    00150 #undef _foreach
    00151 #endif // _foreach
    00152
    00153 #ifdef _foreach_reverse
    00154 #undef _foreach_reverse
    00155 #endif // _foreach_reverse
    00156
    00157 #ifdef _foreach_if
    00158 #undef _foreach_if
    00159 #endif // _foreach_if
    00160
    00161 #ifdef _foreach_reverse_if
    00162 #undef _foreach_reverse_if
    00163 #endif // _foreach_reverse_if
    00164
    00165 #define _foreach QX_FOREACH
    00166 #define _foreach_reverse QX_FOREACH_REVERSE
    00167
    00168 #define _foreach_if(VAR, COL, COND) _foreach(VAR, COL) if (COND)
    00169 #define _foreach_reverse_if(VAR, COL, COND) _foreach_reverse(VAR, COL) if (COND)
    00170
    00171 #endif // _QX_FOREACH_H_
    00172 #endif // _QX_ENABLE_BOOST