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Diffstat (limited to 'src/compiler/scala/tools/nsc/settings/MutableSettings.scala')
-rw-r--r-- | src/compiler/scala/tools/nsc/settings/MutableSettings.scala | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/compiler/scala/tools/nsc/settings/MutableSettings.scala b/src/compiler/scala/tools/nsc/settings/MutableSettings.scala index f1f289ed4d..e4f99474e1 100644 --- a/src/compiler/scala/tools/nsc/settings/MutableSettings.scala +++ b/src/compiler/scala/tools/nsc/settings/MutableSettings.scala @@ -221,6 +221,7 @@ class MutableSettings(val errorFn: String => Unit) def OutputSetting(outputDirs: OutputDirs, default: String) = add(new OutputSetting(outputDirs, default)) def PhasesSetting(name: String, descr: String, default: String = "") = add(new PhasesSetting(name, descr, default)) def StringSetting(name: String, arg: String, descr: String, default: String) = add(new StringSetting(name, arg, descr, default)) + def ScalaVersionSetting(name: String, arg: String, descr: String, default: ScalaVersion) = add(new ScalaVersionSetting(name, arg, descr, default)) def PathSetting(name: String, descr: String, default: String): PathSetting = { val prepend = StringSetting(name + "/p", "", "", "").internalOnly() val append = StringSetting(name + "/a", "", "", "").internalOnly() @@ -486,6 +487,35 @@ class MutableSettings(val errorFn: String => Unit) withHelpSyntax(name + " <" + arg + ">") } + /** A setting represented by a Scala version, (`default` unless set) */ + class ScalaVersionSetting private[nsc]( + name: String, + val arg: String, + descr: String, + default: ScalaVersion) + extends Setting(name, descr) { + import ScalaVersion._ + + type T = ScalaVersion + protected var v: T = NoScalaVersion + + override def tryToSet(args: List[String]) = { + value = default + Some(args) + } + + override def tryToSetColon(args: List[String]) = args match { + case Nil => value = default; Some(Nil) + case x :: xs => value = ScalaVersion(x, errorFn) ; Some(xs) + } + + override def tryToSetFromPropertyValue(s: String) = tryToSet(List(s)) + + def unparse: List[String] = if (value == NoScalaVersion) Nil else List(s"${name}:${value.unparse}") + + withHelpSyntax(s"${name}:<${arg}>") + } + class PathSetting private[nsc]( name: String, descr: String, |