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
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
|
/* ____ ____ ____ ____ ______ *\
** / __// __ \/ __// __ \/ ____/ SOcos COmpiles Scala **
** __\_ \/ /_/ / /__/ /_/ /\_ \ (c) 2002, LAMP/EPFL **
** /_____/\____/\___/\____/____/ **
\* */
// $Id$
package scalac.util;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashSet;
import scala.tools.util.Position;
import scalac.ApplicationError;
public class Reporter {
//########################################################################
// Private Fields
/** The reader to ask for failures on demand */
private final BufferedReader reader;
/** The writer to print messages */
private final PrintWriter writer;
/** Log of error positions (used to avoid printing errors twice) */
private final HashSet positions;
/** Number of errors issued totally */
private int errors;
/** Number of warning issued totally */
private int warnings;
//########################################################################
// Public Fields
/** Whether warnings should be issued */
public boolean nowarn;
/** Whether information messages should be issued */
public boolean verbose;
/** Whether a prompt should be displayed after errors and warnings */
public boolean prompt;
/** Whether a short file name should be displayed before errors */
public boolean shortname;
//########################################################################
// Public Constructors
/** Initializes a new instance. */
public Reporter() {
this(
new BufferedReader(new InputStreamReader(System.in)),
new PrintWriter(System.err, true));
}
/** Initializes a new instance. */
public Reporter(BufferedReader reader, PrintWriter writer) {
this.reader = reader;
this.writer = writer;
this.positions = new HashSet();
this.prompt = false;
this.nowarn = false;
this.verbose = false;
this.errors = 0;
}
//########################################################################
// Public Methods - Count
/** Returns the number of errors issued totally */
public int errors() {
return errors;
}
/** Returns the number of warnings issued totally */
public int warnings() {
return warnings;
}
/** Returns the number of errors issued totally as a string */
public String getErrorCountString() {
return getCountString(errors, "error");
}
/** Returns the number of warnings issued totally as a string */
public String getWarningCountString() {
return getCountString(warnings, "warning");
}
/** Returns a string meaning "n elements". */
public String getCountString(int n, String elements) {
switch (n) {
case 0: return "no " + elements + "s";
case 1: return "one " + elements;
case 2: return "two " + elements + "s";
case 3: return "three " + elements + "s";
case 4: return "four " + elements + "s";
default: return n + " " + elements + "s";
}
}
/** Resets all counters */
public void resetCounters() {
errors = 0;
warnings = 0;
}
//########################################################################
// Public Methods - Report
/** Issues a message */
public void report(String message) {
printMessage(message);
}
/** Issues a message */
public void inform(String message) {
if (verbose) printMessage(message);
}
/** Issues an error */
public void error(Position position, String message) {
boolean hidden = testAndLog(position);
if (!hidden || prompt) printError(position, message);
if (!hidden) errors++;
if (prompt) failOnDemand();
}
/** Issues a warning */
public void warning(Position position, String message) {
boolean hidden = testAndLog(position);
if (nowarn) return;
if (!hidden || prompt) printWarning(position, message);
if (!hidden) warnings++;
if (prompt) failOnDemand();
}
//########################################################################
// Public Methods - Print
/** Prints the message. */
public void printMessage(String message) {
writer.println(message);
}
/** Prints the message with the given position indication. */
public void printMessage(Position position, String message) {
if (position != null) {
message = " " + message;
if (position.getLineNumber() != 0)
message = position.getLineNumber() + ":" + message;
if (shortname)
message = position.getName() + ":" + message;
else
message = position.getPath() + ":" + message;
}
printMessage(message);
printSourceLine(position);
}
/** Prints the error message. */
public void printError(Position position, String message) {
if (position == null) message = "error: " + message;
printMessage(position, message);
}
/** Prints the warning message. */
public void printWarning(Position position, String message) {
message = "warning: " + message;
printMessage(position, message);
}
/** Prints the number of errors and warnings if their are non-zero. */
public void printSummary() {
if (errors() > 0) report(getErrorCountString() + " found");
if (warnings() > 0) report(getWarningCountString() + " found");
}
/** Prints the source line of the given position. */
public void printSourceLine(Position position) {
String line = position == null ? null : position.getLineContent();
if (line == null) return;
printMessage(line);
printColumnMarker(position);
}
/** Prints the column marker of the given position. */
public void printColumnMarker(Position position) {
int column = position == null ? 0 : position.getColumnNumber();
StringBuffer buffer = new StringBuffer(column);
for (int i = 1; i < column; i++) buffer.append(' ');
if (column > 0) buffer.append('^');
printMessage(buffer.toString());
}
//########################################################################
// Public Methods - Fail on demand
/** Fails only if requested. */
public void failOnDemand() {
failOnDemand("user abort");
}
/** Fails only if requested. */
public void failOnDemand(String message) {
try {
while (true) {
writer.print("r)esume, a)bort: ");
writer.flush();
String line = reader.readLine();
if (line == null) continue; else line = line.toLowerCase();
if ("abort".startsWith(line))
throw new ApplicationError(message);
if ("resume".startsWith(line)) return;
}
} catch (IOException e) {
throw new ApplicationError("input read error");
}
}
//########################################################################
// Private Methods
/** Logs a position and returns true if it was already logged. */
private boolean testAndLog(Position position) {
if (position == null) return false;
if (position.getColumnNumber() == 0) return false;
if (positions.contains(position)) return true;
positions.add(position);
return false;
}
//########################################################################
}
|
