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/* NSC -- new Scala compiler
* Copyright 2002-2007 LAMP/EPFL
* @author Martin Odersky
*/
// $Id$
package scala.tools.nsc.reporters
import scala.tools.nsc.util.Position
/**
* This interface provides methods to issue information, warning and
* error messages.
*/
abstract class Reporter {
object severity extends Enumeration
abstract class Severity extends severity.Value {
var count : Int = 0
}
object INFO extends Severity { def id = 0 }
object WARNING extends Severity { def id = 1 }
object ERROR extends Severity { def id = 2 }
def reset: Unit = {
INFO.count = 0
ERROR.count = 0
WARNING.count = 0
cancelled = false
}
var cancelled: Boolean = false
def hasErrors: Boolean = ERROR.count != 0 || cancelled
/** Flush all output */
def flush() { }
protected def info0(pos: Position, msg: String, severity: Severity, force: Boolean): Unit
def info(pos: Position, msg: String, force: Boolean): Unit = info0(pos, msg, INFO, force)
def warning(pos: Position, msg: String ): Unit = info0(pos, msg, WARNING, false)
def error(pos: Position, msg: String ): Unit = info0(pos, msg, ERROR, false)
/** An error that could possibly be fixed if the unit were longer.
* This is used, for example, when the interpreter tries
* to distinguish fatal errors from those that are due to
* needing more lines of input from the user.
*/
var incompleteInputError: (Position, String) => Unit = error
def withIncompleteHandler[T](handler: (Position, String) => Unit)(thunk: => T) = {
val savedHandler = incompleteInputError
try {
incompleteInputError = handler
thunk
} finally {
incompleteInputError = savedHandler
}
}
// @M: moved here from ConsoleReporter and made public -- also useful in e.g. Typers
/** Returns a string meaning "n elements".
*
* @param n ...
* @param elements ...
* @return ...
*/
def countElementsAsString(n: Int, elements: String): String =
n match {
case 0 => "no " + elements + "s"
case 1 => "one " + elements
case 2 => "two " + elements + "s"
case 3 => "three " + elements + "s"
case 4 => "four " + elements + "s"
case _ => "" + n + " " + elements + "s"
}
/** Turns a count into a friendly English description if n<=4.
*
* @param n ...
* @return ...
*/
def countAsString(n: Int): String =
n match {
case 0 => "none"
case 1 => "one"
case 2 => "two"
case 3 => "three"
case 4 => "four"
case _ => "" + n
}
}
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