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| author | Paul Phillips <paulp@improving.org> | 2012-07-21 19:49:55 -0700 |
|---|---|---|
| committer | Paul Phillips <paulp@improving.org> | 2012-07-27 05:42:17 -0700 |
| commit | bc719cb8e4957a80e423350d8e993f1fa6a2a997 (patch) | |
| tree | 2939e8688721c66fd1493bdadf9260d75faa4514 /src/compiler/scala/tools/nsc/typechecker/Typers.scala | |
| parent | ad08f24448729009fc8d5ff0acf307a43b4cfe0a (diff) | |
| download | scala-bc719cb8e4957a80e423350d8e993f1fa6a2a997.tar.gz scala-bc719cb8e4957a80e423350d8e993f1fa6a2a997.tar.bz2 scala-bc719cb8e4957a80e423350d8e993f1fa6a2a997.zip | |
Improve unchecked warnings a lot.
Don't warn on "uncheckable" type patterns if they can be
statically guaranteed, regardless of their runtime checkability.
This covers patterns like Seq[Any] and lots more.
Review by @adriaanm.
Diffstat (limited to 'src/compiler/scala/tools/nsc/typechecker/Typers.scala')
| -rw-r--r-- | src/compiler/scala/tools/nsc/typechecker/Typers.scala | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/compiler/scala/tools/nsc/typechecker/Typers.scala b/src/compiler/scala/tools/nsc/typechecker/Typers.scala index 51753baa4f..269ab9611a 100644 --- a/src/compiler/scala/tools/nsc/typechecker/Typers.scala +++ b/src/compiler/scala/tools/nsc/typechecker/Typers.scala @@ -3672,7 +3672,8 @@ trait Typers extends Modes with Adaptations with Tags { typedClassOf(tree, args.head, true) else { if (!isPastTyper && fun.symbol == Any_isInstanceOf && !targs.isEmpty) - checkCheckable(tree, targs.head, inPattern = false) + checkCheckable(tree, targs.head, AnyClass.tpe, inPattern = false) + val resultpe = restpe.instantiateTypeParams(tparams, targs) //@M substitution in instantiateParams needs to be careful! //@M example: class Foo[a] { def foo[m[x]]: m[a] = error("") } (new Foo[Int]).foo[List] : List[Int] |