1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
#ifndef _ERROR_H
#define _ERROR_H
#include <exception>
#include <string>
#include <cstring>
#include <sstream>
#include <list>
class error_context
{
public:
std::string desc;
error_context(const std::string& _desc) throw() : desc(_desc) {}
virtual ~error_context() throw() {}
virtual void describe(std::ostream& out) const throw() {
if (! desc.empty())
out << desc << std::endl;
}
};
class file_context : public error_context
{
protected:
std::string file;
unsigned long line;
public:
file_context(const std::string& _file, unsigned long _line,
const std::string& desc = "") throw()
: error_context(desc), file(_file), line(_line) {}
virtual ~file_context() throw() {}
virtual void describe(std::ostream& out) const throw() {
if (! desc.empty())
out << desc << " ";
out << "\"" << file << "\", line " << line << ": ";
}
};
class line_context : public error_context {
public:
std::string line;
long pos;
line_context(const std::string& _line, long _pos,
const std::string& desc = "") throw()
: error_context(desc), line(_line), pos(_pos) {}
virtual ~line_context() throw() {}
virtual void describe(std::ostream& out) const throw() {
if (! desc.empty())
out << desc << std::endl;
out << " " << line << std::endl << " ";
long idx = pos < 0 ? line.length() - 1 : pos;
for (int i = 0; i < idx; i++)
out << " ";
out << "^" << std::endl;
}
};
//////////////////////////////////////////////////////////////////////
class str_exception : public std::exception {
protected:
std::string reason;
public:
std::list<error_context *> context;
str_exception(const std::string& _reason,
error_context * ctxt = NULL) throw()
: reason(_reason) {
if (ctxt)
context.push_back(ctxt);
}
virtual ~str_exception() throw() {
for (std::list<error_context *>::iterator i = context.begin();
i != context.end();
i++)
delete *i;
}
virtual void reveal_context(std::ostream& out,
const std::string& kind) const throw() {
for (std::list<error_context *>::const_reverse_iterator i =
context.rbegin();
i != context.rend();
i++) {
std::list<error_context *>::const_reverse_iterator x = i;
if (++x == context.rend())
out << kind << ": ";
(*i)->describe(out);
}
}
virtual const char* what() const throw() {
return reason.c_str();
}
};
class error : public str_exception {
public:
error(const std::string& reason, error_context * ctxt = NULL) throw()
: str_exception(reason, ctxt) {}
virtual ~error() throw() {}
};
class fatal : public str_exception {
public:
fatal(const std::string& reason, error_context * ctxt = NULL) throw()
: str_exception(reason, ctxt) {}
virtual ~fatal() throw() {}
};
class fatal_assert : public fatal {
public:
fatal_assert(const std::string& reason, error_context * ctxt = NULL) throw()
: fatal(std::string("assertion failed '") + reason + "'", ctxt) {}
virtual ~fatal_assert() throw() {}
};
#endif // _ERROR_H
|
