libstdc++-v3/testsuite/util/regression/trait/erase_if_fn.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005, 2006 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the terms
   7 // of the GNU General Public License as published by the Free Software
   8 // Foundation; either version 2, or (at your option) any later
   9 // version.
  10
  11 // This library is distributed in the hope that it will be useful, but
  12 // WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 // General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License
  17 // along with this library; see the file COPYING.  If not, write to
  18 // the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
  19 // MA 02111-1307, USA.
  20
  21 // As a special exception, you may use this file as part of a free
  22 // software library without restriction.  Specifically, if other files
  23 // instantiate templates or use macros or inline functions from this
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  25 // produce an executable, this file does not by itself cause the
  26 // resulting executable to be covered by the GNU General Public
  27 // License.  This exception does not however invalidate any other
  28 // reasons why the executable file might be covered by the GNU General
  29 // Public License.
  30
  31 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  32
  33 // Permission to use, copy, modify, sell, and distribute this software
  34 // is hereby granted without fee, provided that the above copyright
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  37 // of the above authors, nor IBM Haifa Research Laboratories, make any
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  40 // warranty.
  41
  42 /**
  43  * @file erase_if_fn.hpp
  44  * Contains traits for a random regression test
  45  *    for a specific container type.
  46  */
  47
  48 #ifndef PB_DS_REGRESSION_TEST_ERASE_IF_FN_HPP
  49 #define PB_DS_REGRESSION_TEST_ERASE_IF_FN_HPP
  50
  51 #include <functional>
  52
  53 namespace __gnu_pbds
  54 {
  55   namespace test
  56   {
  57     namespace detail
  58     {
  59       template<typename T>
  60       struct regression_test_erase_if_fn
  61       : public std::unary_function<T, bool>
  62       {
  63       private:
  64         typedef const T&  const_reference;
  65
  66       public:
  67         bool
  68         operator()(const_reference r_t) const
  69         {
  70           return (r_t.length() == 0 ||
  71                   static_cast<size_t>(*((r_t).begin())) % 2 == 1);
  72         }
  73       };
  74
  75       template<typename Hd, class Tl>
  76       struct regression_test_erase_if_fn<std::pair<Hd, Tl> >
  77       : public std::unary_function<std::pair<Hd, Tl>, bool>
  78       {
  79       private:
  80         typedef const std::pair<Hd, Tl>&  const_reference;
  81         typedef regression_test_erase_if_fn<Hd> hd_erase_if_fn;
  82         typedef regression_test_erase_if_fn<Tl> tl_erase_if_fn;
  83
  84       public:
  85         bool
  86         operator()(const_reference r_t) const
  87         {
  88           return (hd_erase_if_fn()(r_t.first) && tl_erase_if_fn()(r_t.second));
  89         }
  90       };
  91     } // namespace detail
  92   } // namespace test
  93 } // namespace __gnu_pbds
  94
  95 #endif