LCOV - code coverage report
Current view: top level - include/xapian - derefwrapper.h (source / functions) Hit Total Coverage
Test: Test Coverage for xapian-core 7028d852e609 Lines: 3 3 100.0 %
Date: 2019-02-17 14:59:59 Functions: 4 4 100.0 %
Branches: 0 0 -

           Branch data     Line data    Source code
       1                 :            : /** @file  derefwrapper.h
       2                 :            :  *  @brief Class for wrapping type returned by an input_iterator.
       3                 :            :  */
       4                 :            : /* Copyright (C) 2004,2008,2009,2013,2014 Olly Betts
       5                 :            :  *
       6                 :            :  * This program is free software; you can redistribute it and/or
       7                 :            :  * modify it under the terms of the GNU General Public License as
       8                 :            :  * published by the Free Software Foundation; either version 2 of the
       9                 :            :  * License, or (at your option) any later version.
      10                 :            :  *
      11                 :            :  * This program is distributed in the hope that it will be useful,
      12                 :            :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      13                 :            :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14                 :            :  * GNU General Public License for more details.
      15                 :            :  *
      16                 :            :  * You should have received a copy of the GNU General Public License
      17                 :            :  * along with this program; if not, write to the Free Software
      18                 :            :  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
      19                 :            :  * USA
      20                 :            :  */
      21                 :            : 
      22                 :            : #ifndef XAPIAN_INCLUDED_DEREFWRAPPER_H
      23                 :            : #define XAPIAN_INCLUDED_DEREFWRAPPER_H
      24                 :            : 
      25                 :            : #if !defined XAPIAN_IN_XAPIAN_H && !defined XAPIAN_LIB_BUILD
      26                 :            : # error "Never use <xapian/derefwraper.h> directly; include <xapian.h> instead."
      27                 :            : #endif
      28                 :            : 
      29                 :            : namespace Xapian {
      30                 :            : 
      31                 :            : /** @private @internal Class which returns a value when dereferenced with
      32                 :            :  *  operator*.
      33                 :            :  *
      34                 :            :  *  We need this wrapper class to implement input_iterator semantics for the
      35                 :            :  *  postfix operator++ methods of some of our iterator classes.
      36                 :            :  */
      37                 :            : template<typename T>
      38                 :        832 : class DerefWrapper_ {
      39                 :            :     /// Don't allow assignment.
      40                 :            :     void operator=(const DerefWrapper_ &);
      41                 :            : 
      42                 :            :     /// The value.
      43                 :            :     T res;
      44                 :            : 
      45                 :            :   public:
      46                 :      19330 :     explicit DerefWrapper_(const T &res_) : res(res_) { }
      47                 :         72 :     const T & operator*() const { return res; }
      48                 :            : };
      49                 :            : 
      50                 :            : }
      51                 :            : 
      52                 :            : #endif // XAPIAN_INCLUDED_DEREFWRAPPER_H

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