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
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
// file : CCF/IDL2/LexicalAnalyzer.hpp
// author : Boris Kolpackov <boris@dre.vanderbilt.edu>
// cvs-id : $Id$
#ifndef CCF_IDL2_LEXICAL_ANALYZER_HPP
#define CCF_IDL2_LEXICAL_ANALYZER_HPP
#include <set>
#include <map>
#include <deque>
#include <locale>
#include <string>
#include "CCF/CompilerElements/TokenStream.hpp"
#include "CCF/CompilerElements/PreprocessorToken.hpp"
#include "CCF/IDL2/Token.hpp"
namespace CCF
{
namespace IDL2
{
//@@ Call to get() after eof is illegal.
//
//
class LexicalAnalyzer : public CompilerElements::TokenStream<TokenPtr>
{
public:
virtual
~LexicalAnalyzer () throw () {}
public:
typedef
CompilerElements::CPP::Token
Char;
typedef
std::deque<Char>
CharBuffer;
LexicalAnalyzer (CompilerElements::TokenStream<Char>& is);
virtual TokenPtr
next ();
protected:
virtual Char
skip_space (Char c);
virtual TokenPtr
identifier (Char c);
virtual bool
punctuation (Char c, TokenPtr& token);
virtual bool
operator_ (Char c, TokenPtr& token);
virtual bool
character_literal (Char c, TokenPtr& token);
virtual bool
string_literal (Char c, TokenPtr& token);
virtual std::string
string_literal_trailer ();
virtual bool
integer_literal (Char c, TokenPtr& token);
// Literal scanners.
//
//
class Format {};
class Boundary {};
std::pair<char, std::size_t>
scan_char (char const* s) throw (Format);
std::string
scan_string (std::string const& s) throw (Format);
unsigned long long
scan_integer (std::string const& s, unsigned short base)
throw (Format, Boundary);
protected:
virtual Char
get ();
virtual Char
peek ();
virtual Char
peek_more ();
virtual void
ret (Char const& c);
protected:
// Character utility functions.
//
bool
is_alpha (char c) const
{
return std::isalpha (c, loc_);
}
bool
is_oct_digit (char c) const
{
return std::isdigit (c, loc_) && c != '8' && c != '9';
}
bool
is_dec_digit (char c) const
{
return std::isdigit (c, loc_);
}
bool
is_hex_digit (char c) const
{
return std::isxdigit (c, loc_);
}
bool
is_alnum (char c) const
{
return std::isalnum (c, loc_);
}
bool
is_space (char c) const
{
return std::isspace (c, loc_);
}
bool
is_eos (Char const& c) const
{
return c == Char::eos;
}
char
to_upper (char c) const
{
return std::toupper (c, loc_);
}
protected:
typedef
std::set<std::string>
KeywordTable;
struct IdentifierTreeNode
{
typedef
std::map<std::string, IdentifierTreeNode>
PrefixMap;
IdentifierTreeNode&
operator[] (char const* key)
{
return map_[key];
}
PrefixMap map_;
};
typedef
std::set<std::string>
PunctuationTable;
typedef
std::set<std::string>
OperatorTable;
protected:
bool
read_simple_identifier (std::string& lexeme, CharBuffer& buf);
bool
traverse_identifier_tree (std::string& lexeme,
IdentifierTreeNode const& node);
protected:
std::locale loc_;
CompilerElements::TokenStream<Char>& is_;
CharBuffer ibuffer_;
KeywordTable keyword_table_;
IdentifierTreeNode identifier_tree_;
PunctuationTable punctuation_table_;
OperatorTable operator_table_;
};
}
}
#endif // CCF_IDL2_LEXICAL_ANALYZER_HPP
|