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package dotty.tools
package dotc
package reporting
import util.SourcePosition
import core.Contexts._
import java.io.{ BufferedReader, PrintWriter }
import diagnostic.{ Message, MessageContainer }
import diagnostic.messages._
/**
* This class implements a Reporter that displays messages on a text console
*/
class ConsoleReporter(
reader: BufferedReader = Console.in,
writer: PrintWriter = new PrintWriter(Console.err, true)
) extends Reporter with UniqueMessagePositions with HideNonSensicalMessages with MessageRendering {
import MessageContainer._
/** maximal number of error messages to be printed */
protected def ErrorLimit = 100
/** Prints the message. */
def printMessage(msg: String): Unit = { writer.print(msg + "\n"); writer.flush() }
/** Prints the message with the given position indication. */
def printMessageAndPos(msg: Message, pos: SourcePosition, diagnosticLevel: String)(implicit ctx: Context): Boolean = {
printMessage(messageAndPos(msg, pos, diagnosticLevel))
true
}
def printExplanation(m: Message)(implicit ctx: Context): Unit = {
printMessage(explanation(m))
}
override def doReport(m: MessageContainer)(implicit ctx: Context): Unit = {
val didPrint = m match {
case m: Error =>
val didPrint = printMessageAndPos(m.contained, m.pos, diagnosticLevel(m))
if (ctx.settings.prompt.value) displayPrompt()
didPrint
case m: ConditionalWarning if !m.enablingOption.value =>
false
case m =>
printMessageAndPos(m.contained, m.pos, diagnosticLevel(m))
}
if (didPrint && ctx.shouldExplain(m))
printExplanation(m.contained)
else if (didPrint && m.contained.explanation.nonEmpty)
printMessage("\nlonger explanation available when compiling with `-explain`")
}
def displayPrompt(): Unit = {
writer.print("\na)bort, s)tack, r)esume: ")
writer.flush()
if (reader != null) {
val response = reader.read().asInstanceOf[Char].toLower
if (response == 'a' || response == 's') {
Thread.dumpStack()
if (response == 'a')
sys.exit(1)
}
writer.print("\n")
writer.flush()
}
}
override def flush()(implicit ctx: Context): Unit = { writer.flush() }
}
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