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
204
205
206
207
208
209
210
211
212
213
214
215
|
/*
* Anarres C Preprocessor
* Copyright (C) 2007 Shevek
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.anarres.cpp;
/**
* A Preprocessor token.
*
* @see Preprocessor
*/
public final class Token {
// public static final int EOF = -1;
private int type;
private int line;
private int column;
private Object value;
private String text;
public Token(int type, int line, int column,
String text, Object value) {
this.type = type;
this.line = line;
this.column = column;
this.text = text;
this.value = value;
}
public Token(int type, int line, int column, String text) {
this(type, line, column, text, null);
}
/* pp */ Token(int type, String text, Object value) {
this(type, -1, -1, text, value);
}
/* pp */ Token(int type, String text) {
this(type, text, null);
}
/* pp */ Token(int type) {
this(type, texts[type]);
}
/**
* Returns the semantic type of this token.
*/
public int getType() {
return type;
}
/* pp */ void setLocation(int line, int column) {
this.line = line;
this.column = column;
}
/**
* Returns the line at which this token started.
*
* Lines are numbered from zero.
*/
public int getLine() {
return line;
}
/**
* Returns the column at which this token started.
*
* Columns are numbered from zero.
*/
public int getColumn() {
return column;
}
/**
* Returns the original or generated text of this token.
*
* This is distinct from the semantic value of the token.
*
* @see #getValue()
*/
public String getText() {
return text;
}
/**
* Returns the semantic value of this token.
*
* For strings, this is the parsed String.
* For integers, this is an Integer object.
* For other token types, as appropriate.
*
* @see #getText()
*/
public Object getValue() {
return value;
}
/**
* Returns a description of this token, for debugging purposes.
*/
public String toString() {
StringBuilder buf = new StringBuilder();
buf.append('[').append(getTokenName(type));
if (line != -1) {
buf.append('@').append(line);
if (column != -1)
buf.append(',').append(column);
}
buf.append("]:");
if (text != null)
buf.append('"').append(text).append('"');
else if (type > 3 && type < 256)
buf.append( (char)type );
else
buf.append('<').append(type).append('>');
if (value != null)
buf.append('=').append(value);
return buf.toString();
}
/**
* Returns the descriptive name of the given token type.
*
* This is mostly used for stringification and debugging.
*/
public static final String getTokenName(int type) {
if (type < 0)
return "Invalid" + type;
if (type >= names.length)
return "Invalid" + type;
if (names[type] == null)
return "Unknown" + type;
return names[type];
}
#set ($i = 257)
#set ($tokens = [ "AND_EQ", "ARROW", "CHARACTER", "COMMENT", "DEC", "DIV_EQ", "ELLIPSIS", "EOF", "EQ", "GE", "HASH", "HEADER", "IDENTIFIER", "INC", "INTEGER", "LAND", "LAND_EQ", "LE", "LITERAL", "LOR", "LOR_EQ", "LSH", "LSH_EQ", "MOD_EQ", "MULT_EQ", "NE", "NL", "OR_EQ", "PASTE", "PLUS_EQ", "RANGE", "RSH", "RSH_EQ", "STRING", "SUB_EQ", "WHITESPACE", "XOR_EQ", "M_ARG", "M_PASTE", "M_STRING", "P_LINE", "ERROR" ])
#foreach ($token in $tokens)
/** The token type $token. */
public static final int $token = $i;
#set ($i = $i + 1)
#end
/**
* The number of possible semantic token types.
*
* Please note that not all token types below 255 are used.
*/
public static final int _TOKENS = $i;
/** The position-less space token. */
/* pp */ static final Token space = new Token(WHITESPACE, -1, -1, " ");
private static final String[] names = new String[_TOKENS];
private static final String[] texts = new String[_TOKENS];
static {
for (int i = 0; i < 255; i++) {
texts[i] = String.valueOf(new char[] { (char)i });
names[i] = texts[i];
}
texts[AND_EQ] = "&=";
texts[ARROW] = "->";
texts[DEC] = "--";
texts[DIV_EQ] = "/=";
texts[ELLIPSIS] = "...";
texts[EQ] = "==";
texts[GE] = ">=";
texts[HASH] = "#";
texts[INC] = "++";
texts[LAND] = "&&";
texts[LAND_EQ] = "&&=";
texts[LE] = "<=";
texts[LOR] = "||";
texts[LOR_EQ] = "||=";
texts[LSH] = "<<";
texts[LSH_EQ] = "<<=";
texts[MOD_EQ] = "%=";
texts[MULT_EQ] = "*=";
texts[NE] = "!=";
texts[NL] = "\n";
texts[OR_EQ] = "|=";
/* We have to split the two hashes or Velocity eats them. */
texts[PASTE] = "#" + "#";
texts[PLUS_EQ] = "+=";
texts[RANGE] = "..";
texts[RSH] = ">>";
texts[RSH_EQ] = ">>=";
texts[SUB_EQ] = "-=";
texts[XOR_EQ] = "^=";
#foreach ($token in $tokens)
names[$token] = "$token";
#end
}
}
|
