Track symbol that caused a deprecation warning.

So that we can filter deprecations based on defining package.

Configurable error reporting will support a rule like:
"In compilation unit X, escalate deprecation warnings that
result from accessing members in package P that have been deprecated
since version V. Report an error instead of a warning for those."

TODO: remove deprecationWarning overload that doesn't take a `Symbol`?
(Replace by a default value of `NoSymbol` for the deprecated symbol arg?)

1 files changed, 4 insertions, 0 deletions

diff --git a/src/compiler/scala/tools/nsc/Reporting.scala b/src/compiler/scala/tools/nsc/Reporting.scala
index a8fd3bec76..1b5a778235 100644
--- a/src/compiler/scala/tools/nsc/Reporting.scala
+++ b/src/compiler/scala/tools/nsc/Reporting.scala
@@ -61,6 +61,7 @@ trait Reporting extends scala.reflect.internal.Reporting { self: ast.Positions w
     private val _inlinerWarnings        = new ConditionalWarning("inliner", settings.YinlinerWarnings)
     private val _allConditionalWarnings = List(_deprecationWarnings, _uncheckedWarnings, _featureWarnings, _inlinerWarnings)
 
+    // TODO: remove in favor of the overload that takes a Symbol, give that argument a default (NoSymbol)
     def deprecationWarning(pos: Position, msg: String): Unit = _deprecationWarnings.warn(pos, msg)
     def uncheckedWarning(pos: Position, msg: String): Unit   = _uncheckedWarnings.warn(pos, msg)
     def featureWarning(pos: Position, msg: String): Unit     = _featureWarnings.warn(pos, msg)
@@ -73,6 +74,9 @@ trait Reporting extends scala.reflect.internal.Reporting { self: ast.Positions w
 
     def allConditionalWarnings = _allConditionalWarnings flatMap (_.warnings)
 
+    // behold! the symbol that caused the deprecation warning (may not be deprecated itself)
+    def deprecationWarning(pos: Position, sym: Symbol, msg: String): Unit = _deprecationWarnings.warn(pos, msg)
+
     private[this] var reportedFeature = Set[Symbol]()
     def featureWarning(pos: Position, featureName: String, featureDesc: String, featureTrait: Symbol, construct: => String = "", required: Boolean): Unit = {
       val req     = if (required) "needs to" else "should"