1//Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc.
2
3//Distributed under the Boost Software License, Version 1.0. (See accompanying
4//file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
5
6#ifndef BOOST_EXCEPTION_1A590226753311DD9E4CCF6156D89593
7#define BOOST_EXCEPTION_1A590226753311DD9E4CCF6156D89593
8
9#include <boost/config.hpp>
10#include <boost/exception/exception.hpp>
11#include <boost/exception/detail/error_info_impl.hpp>
12#include <boost/exception/detail/type_info.hpp>
13#include <boost/exception/detail/shared_ptr.hpp>
14#include <boost/assert.hpp>
15
16#ifndef BOOST_EXCEPTION_ENABLE_WARNINGS
17#if __GNUC__*100+__GNUC_MINOR__>301
18#pragma GCC system_header
19#endif
20#ifdef __clang__
21#pragma clang system_header
22#endif
23#ifdef _MSC_VER
24#pragma warning(push,1)
25#endif
26#endif
27
28namespace
29boost
30 {
31 namespace
32 exception_detail
33 {
34 template <class ErrorInfo>
35 struct
36 get_info
37 {
38 static
39 typename ErrorInfo::value_type *
40 get( exception const & x )
41 {
42 if( exception_detail::error_info_container * c=x.data_.get() )
43 if( shared_ptr<exception_detail::error_info_base> eib = c->get(BOOST_EXCEPTION_STATIC_TYPEID(ErrorInfo)) )
44 {
45#ifndef BOOST_NO_RTTI
46 BOOST_ASSERT( 0!=dynamic_cast<ErrorInfo *>(eib.get()) );
47#endif
48 ErrorInfo * w = static_cast<ErrorInfo *>(eib.get());
49 return &w->value();
50 }
51 return 0;
52 }
53 };
54
55 template <>
56 struct
57 get_info<throw_function>
58 {
59 static
60 char const * *
61 get( exception const & x )
62 {
63 return x.throw_function_ ? &x.throw_function_ : 0;
64 }
65 };
66
67 template <>
68 struct
69 get_info<throw_file>
70 {
71 static
72 char const * *
73 get( exception const & x )
74 {
75 return x.throw_file_ ? &x.throw_file_ : 0;
76 }
77 };
78
79 template <>
80 struct
81 get_info<throw_line>
82 {
83 static
84 int *
85 get( exception const & x )
86 {
87 return x.throw_line_!=-1 ? &x.throw_line_ : 0;
88 }
89 };
90
91 template <class T,class R>
92 struct
93 get_error_info_return_type
94 {
95 typedef R * type;
96 };
97
98 template <class T,class R>
99 struct
100 get_error_info_return_type<T const,R>
101 {
102 typedef R const * type;
103 };
104 }
105
106#ifdef BOOST_NO_RTTI
107 template <class ErrorInfo>
108 inline
109 typename ErrorInfo::value_type const *
110 get_error_info( boost::exception const & x )
111 {
112 return exception_detail::get_info<ErrorInfo>::get(x);
113 }
114 template <class ErrorInfo>
115 inline
116 typename ErrorInfo::value_type *
117 get_error_info( boost::exception & x )
118 {
119 return exception_detail::get_info<ErrorInfo>::get(x);
120 }
121#else
122 template <class ErrorInfo,class E>
123 inline
124 typename exception_detail::get_error_info_return_type<E,typename ErrorInfo::value_type>::type
125 get_error_info( E & some_exception )
126 {
127 if( exception const * x = dynamic_cast<exception const *>(&some_exception) )
128 return exception_detail::get_info<ErrorInfo>::get(*x);
129 else
130 return 0;
131 }
132#endif
133 }
134
135#if defined(_MSC_VER) && !defined(BOOST_EXCEPTION_ENABLE_WARNINGS)
136#pragma warning(pop)
137#endif
138#endif
139

source code of include/boost/exception/get_error_info.hpp