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/* NSC -- new Scala compiler
* Copyright 2005-2011 LAMP/EPFL
* @author Paul Phillips
*/
package scala.tools.nsc
/** The main REPL related classes and values are as follows.
* In addition to standard compiler classes Global and Settings, there are:
*
* History: an interface for session history.
* Completion: an interface for tab completion.
* ILoop (formerly InterpreterLoop): The umbrella class for a session.
* IMain (formerly Interpreter): Handles the evolving state of the session
* and handles submitting code to the compiler and handling the output.
* InteractiveReader: how ILoop obtains input.
* History: an interface for session history.
* Completion: an interface for tab completion.
* Power: a repository for more advanced/experimental features.
*
* ILoop contains { in: InteractiveReader, intp: IMain, settings: Settings, power: Power }
* InteractiveReader contains { history: History, completion: Completion }
* IMain contains { global: Global }
*/
package object interpreter {
private[nsc] val DebugProperty = "scala.repl.debug"
private[nsc] val PowerProperty = "scala.repl.power"
private[nsc] var _debug = false
private[nsc] def isReplDebug = _debug || (sys.props contains DebugProperty)
type JClass = java.lang.Class[_]
private[nsc] implicit def enrichClass[T](clazz: Class[T]) = new RichClass[T](clazz)
/** Debug output */
def repldbg(msg: String) = if (isReplDebug) Console println msg
/** Tracing */
def tracing[T](msg: String)(x: T): T = {
if (isReplDebug)
println("(" + msg + ") " + x)
x
}
private[nsc] def isQuoted(s: String) =
(s.length >= 2) && (s.head == s.last) && ("\"'" contains s.head)
// The two name forms this is catching are the two sides of this assignment:
//
// $line3.$read.$iw.$iw.Bippy = $line3.$read$$iw$$iw$Bippy@4a6a00ca
private def removeLineWrapper(s: String) = s.replaceAll("""\$line\d+\.\$(read|eval|print)[$.]""", "")
private def removeIWPackages(s: String) = s.replaceAll("""\$iw[$.]""", "")
/** Heuristically strip interpreter wrapper prefixes
* from an interpreter output string.
*/
def stripWrapperGunk(str: String) = removeIWPackages(removeLineWrapper(str))
/** Class objects */
def classForName(name: String): Option[JClass] =
try Some(Class forName name)
catch { case _: ClassNotFoundException | _: SecurityException => None }
}
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