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/* NSC -- new Scala compiler
* Copyright 2005-2011 LAMP/EPFL
* @author Paul Phillips
*/
package scala.tools
package nsc
package settings
import annotation.elidable
import scala.tools.util.PathResolver.Defaults
import scala.collection.mutable.HashSet
/** Settings influencing the printing of warnings.
*/
trait Warnings {
self: MutableSettings =>
// Warning semantics.
val fatalWarnings = BooleanSetting("-Xfatal-warnings", "Fail the compilation if there are any warnings.")
// These warnings are all so noisy as to be useless in their
// present form, but have the potential to offer useful info.
protected def allWarnings = lintWarnings ++ List(
warnSelectNullable,
warnValueDiscard,
warnNumericWiden
)
// These warnings should be pretty quiet unless you're doing
// something inadvisable.
protected def lintWarnings = List(
warnDeadCode,
warnInaccessible,
warnNullaryOverride,
warnNullaryUnit
)
// Warning groups.
val lint = (
BooleanSetting("-Xlint", "Enable recommended additional warnings.")
withPostSetHook (_ => lintWarnings foreach (_.value = true))
)
val warnEverything = (
BooleanSetting("-Ywarn-all", "Enable all -Y warnings.")
withPostSetHook (_ => lintWarnings foreach (_.value = true))
)
// Individual warnings.
val warnSelectNullable = BooleanSetting ("-Xcheck-null", "Warn upon selection of nullable reference.")
val warnDeadCode = BooleanSetting ("-Ywarn-dead-code", "Warn when dead code is identified.")
val warnValueDiscard = BooleanSetting ("-Ywarn-value-discard", "Warn when non-Unit expression results are unused.")
val warnNumericWiden = BooleanSetting ("-Ywarn-numeric-widen", "Warn when numerics are widened.")
val warnNullaryUnit = BooleanSetting ("-Ywarn-nullary-unit", "Warn when nullary methods return Unit.")
val warnInaccessible = BooleanSetting ("-Ywarn-inaccessible", "Warn about inaccessible types in method signatures.")
val warnNullaryOverride = BooleanSetting ("-Ywarn-nullary-override",
"Warn when non-nullary overrides nullary, e.g. `def foo()` over `def foo`.")
// Backward compatibility.
def Xwarnfatal = fatalWarnings
def Xchecknull = warnSelectNullable
def Ywarndeadcode = warnDeadCode
}
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