source: trunk/yat/utility/yat_assert.h @ 1875

Last change on this file since 1875 was 1875, checked in by Peter, 13 years ago

fixes #504. Also added pp macro YAT_ASSERT that calls yat_assert with an appropriate msg

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File size: 2.2 KB
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[916]1#ifndef _theplu_yat_utility_yat_assert_
2#define _theplu_yat_utility_yat_assert_
3// $Id: yat_assert.h 1875 2009-03-19 12:35:47Z peter $
4
5/*
[1797]6  Copyright (C) 2007, 2008 Jari Häkkinen, Peter Johansson
[1875]7  Copyright (C) 2009 Peter Johansson
[916]8
[1437]9  This file is part of the yat library, http://dev.thep.lu.se/yat
[916]10
11  The yat library is free software; you can redistribute it and/or
12  modify it under the terms of the GNU General Public License as
[1486]13  published by the Free Software Foundation; either version 3 of the
[916]14  License, or (at your option) any later version.
15
16  The yat library is distributed in the hope that it will be useful,
17  but WITHOUT ANY WARRANTY; without even the implied warranty of
18  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19  General Public License for more details.
20
21  You should have received a copy of the GNU General Public License
[1487]22  along with yat. If not, see <http://www.gnu.org/licenses/>.
[916]23*/
24
[1875]25#include <sstream>
26#include <stdexcept>
[936]27#include <string>
28
29namespace theplu {
30namespace yat {
31namespace utility {
32
[966]33  /**
[1197]34     \internal
35
[966]36     \brief yat_assert is similar to assert in std.
37
38     If YAT_DEBUG is enabled and \a assertion is false, and exception
39     X is thrown using constructor X(\a msg ).
40   */
[1875]41  template<class X> inline void yat_assert(bool assertion, std::string msg) 
[916]42#ifdef YAT_DEBUG
[1100]43  { if (!assertion) throw X(std::string("yat_assert:")+msg); }
[916]44#else
[936]45  { }
[916]46#endif
47
[936]48}}}
[1875]49
50
51#ifdef YAT_DEBUG
52// Peter, this is a bit clumsy, but I wanna keep the stringstream
53// invisible outside macro, or multiple calls to macro would result in
54// multiple declaration of the stringstream. Also the macro is
55// supposed to be called with a trailing `;', and that's why we need
56// to end with something that allows that.
57#define YAT_ASSERT(expr) \
58  if (expr) { \
59    std::stringstream yat_msg_;                                 \
60    yat_msg_ << __FILE__ << ":" << __LINE__ << " failed assertion `" \
61             << #expr << "'";                                           \
62    theplu::yat::utility::yat_assert<std::runtime_error>(expr,          \
63                                                         yat_msg_.str()); \
64  } \
65  else theplu::yat::utility::yat_assert<std::runtime_error>(expr, "")
66#else
67// This could be anything empty, but why not use the empty yat_assert
68#define YAT_ASSERT(expr) theplu::yat::utility::yat_assert<std::runtime_error>(expr, "")
69#endif
[936]70  /*
71  */
[916]72#endif
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