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
|
/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003-2013, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
package scala
import java.io.{ BufferedReader, InputStream, InputStreamReader, OutputStream, PrintStream, Reader }
import scala.io.{ AnsiColor, StdIn }
import scala.util.DynamicVariable
/** Implements functionality for
* printing Scala values on the terminal as well as reading specific values.
* Also defines constants for marking up text on ANSI terminals.
*
* @author Matthias Zenger
* @version 1.0, 03/09/2003
*/
object Console extends DeprecatedConsole with AnsiColor {
private val outVar = new DynamicVariable[PrintStream](java.lang.System.out)
private val errVar = new DynamicVariable[PrintStream](java.lang.System.err)
private val inVar = new DynamicVariable[BufferedReader](
new BufferedReader(new InputStreamReader(java.lang.System.in)))
protected def setOutDirect(out: PrintStream): Unit = outVar.value = out
protected def setErrDirect(err: PrintStream): Unit = errVar.value = err
protected def setInDirect(in: BufferedReader): Unit = inVar.value = in
/** The default output, can be overridden by `setOut` */
def out = outVar.value
/** The default error, can be overridden by `setErr` */
def err = errVar.value
/** The default input, can be overridden by `setIn` */
def in = inVar.value
/** Sets the default output stream for the duration
* of execution of one thunk.
*
* @example {{{
* withOut(Console.err) { println("This goes to default _error_") }
* }}}
*
* @param out the new output stream.
* @param thunk the code to execute with
* the new output stream active
* @return the results of `thunk`
* @see `withOut[T](out:OutputStream)(thunk: => T)`
*/
def withOut[T](out: PrintStream)(thunk: =>T): T =
outVar.withValue(out)(thunk)
/** Sets the default output stream for the duration
* of execution of one thunk.
*
* @param out the new output stream.
* @param thunk the code to execute with
* the new output stream active
* @return the results of `thunk`
* @see `withOut[T](out:PrintStream)(thunk: => T)`
*/
def withOut[T](out: OutputStream)(thunk: =>T): T =
withOut(new PrintStream(out))(thunk)
/** Set the default error stream for the duration
* of execution of one thunk.
* @example {{{
* withErr(Console.out) { println("This goes to default _out_") }
* }}}
*
* @param err the new error stream.
* @param thunk the code to execute with
* the new error stream active
* @return the results of `thunk`
* @see `withErr[T](err:OutputStream)(thunk: =>T)`
*/
def withErr[T](err: PrintStream)(thunk: =>T): T =
errVar.withValue(err)(thunk)
/** Sets the default error stream for the duration
* of execution of one thunk.
*
* @param err the new error stream.
* @param thunk the code to execute with
* the new error stream active
* @return the results of `thunk`
* @see `withErr[T](err:PrintStream)(thunk: =>T)`
*/
def withErr[T](err: OutputStream)(thunk: =>T): T =
withErr(new PrintStream(err))(thunk)
/** Sets the default input stream for the duration
* of execution of one thunk.
*
* @example {{{
* val someFile:Reader = openFile("file.txt")
* withIn(someFile) {
* // Reads a line from file.txt instead of default input
* println(readLine)
* }
* }}}
*
* @param thunk the code to execute with
* the new input stream active
*
* @return the results of `thunk`
* @see `withIn[T](in:InputStream)(thunk: =>T)`
*/
def withIn[T](reader: Reader)(thunk: =>T): T =
inVar.withValue(new BufferedReader(reader))(thunk)
/** Sets the default input stream for the duration
* of execution of one thunk.
*
* @param in the new input stream.
* @param thunk the code to execute with
* the new input stream active
* @return the results of `thunk`
* @see `withIn[T](reader:Reader)(thunk: =>T)`
*/
def withIn[T](in: InputStream)(thunk: =>T): T =
withIn(new InputStreamReader(in))(thunk)
/** Prints an object to `out` using its `toString` method.
*
* @param obj the object to print; may be null.
*/
def print(obj: Any) {
out.print(if (null == obj) "null" else obj.toString())
}
/** Flushes the output stream. This function is required when partial
* output (i.e. output not terminated by a newline character) has
* to be made visible on the terminal.
*/
def flush() { out.flush() }
/** Prints a newline character on the default output.
*/
def println() { out.println() }
/** Prints out an object to the default output, followed by a newline character.
*
* @param x the object to print.
*/
def println(x: Any) { out.println(x) }
/** Prints its arguments as a formatted string to the default output,
* based on a string pattern (in a fashion similar to printf in C).
*
* The interpretation of the formatting patterns is described in
* <a href="" target="contentFrame" class="java/util/Formatter">
* `java.util.Formatter`</a>.
*
* @param text the pattern for formatting the arguments.
* @param args the arguments used to instantiating the pattern.
* @throws java.lang.IllegalArgumentException if there was a problem with the format string or arguments
*/
def printf(text: String, args: Any*) { out.print(text format (args : _*)) }
}
private[scala] abstract class DeprecatedConsole {
self: Console.type =>
/** Internal usage only. */
protected def setOutDirect(out: PrintStream): Unit
protected def setErrDirect(err: PrintStream): Unit
protected def setInDirect(in: BufferedReader): Unit
@deprecated("Use the method in scala.io.StdIn", "2.11.0") def readBoolean(): Boolean = StdIn.readBoolean()
@deprecated("Use the method in scala.io.StdIn", "2.11.0") def readByte(): Byte = StdIn.readByte()
@deprecated("Use the method in scala.io.StdIn", "2.11.0") def readChar(): Char = StdIn.readChar()
@deprecated("Use the method in scala.io.StdIn", "2.11.0") def readDouble(): Double = StdIn.readDouble()
@deprecated("Use the method in scala.io.StdIn", "2.11.0") def readFloat(): Float = StdIn.readFloat()
@deprecated("Use the method in scala.io.StdIn", "2.11.0") def readInt(): Int = StdIn.readInt()
@deprecated("Use the method in scala.io.StdIn", "2.11.0") def readLine(): String = StdIn.readLine()
@deprecated("Use the method in scala.io.StdIn", "2.11.0") def readLine(text: String, args: Any*): String = StdIn.readLine(text, args: _*)
@deprecated("Use the method in scala.io.StdIn", "2.11.0") def readLong(): Long = StdIn.readLong()
@deprecated("Use the method in scala.io.StdIn", "2.11.0") def readShort(): Short = StdIn.readShort()
@deprecated("Use the method in scala.io.StdIn", "2.11.0") def readf(format: String): List[Any] = StdIn.readf(format)
@deprecated("Use the method in scala.io.StdIn", "2.11.0") def readf1(format: String): Any = StdIn.readf1(format)
@deprecated("Use the method in scala.io.StdIn", "2.11.0") def readf2(format: String): (Any, Any) = StdIn.readf2(format)
@deprecated("Use the method in scala.io.StdIn", "2.11.0") def readf3(format: String): (Any, Any, Any) = StdIn.readf3(format)
/** Sets the default output stream.
*
* @param out the new output stream.
*/
@deprecated("Use withOut", "2.11.0") def setOut(out: PrintStream): Unit = setOutDirect(out)
/** Sets the default output stream.
*
* @param out the new output stream.
*/
@deprecated("Use withOut", "2.11.0") def setOut(out: OutputStream): Unit = setOutDirect(new PrintStream(out))
/** Sets the default error stream.
*
* @param err the new error stream.
*/
@deprecated("Use withErr", "2.11.0") def setErr(err: PrintStream): Unit = setErrDirect(err)
/** Sets the default error stream.
*
* @param err the new error stream.
*/
@deprecated("Use withErr", "2.11.0") def setErr(err: OutputStream): Unit = setErrDirect(new PrintStream(err))
/** Sets the default input stream.
*
* @param reader specifies the new input stream.
*/
@deprecated("Use withIn", "2.11.0") def setIn(reader: Reader): Unit = setInDirect(new BufferedReader(reader))
/** Sets the default input stream.
*
* @param in the new input stream.
*/
@deprecated("Use withIn", "2.11.0") def setIn(in: InputStream): Unit = setInDirect(new BufferedReader(new InputStreamReader(in)))
}
|
