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author | Jan Niehusmann <jan@gondor.com> | 2012-11-13 22:14:34 +0100 |
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committer | Jan Niehusmann <jan@gondor.com> | 2012-11-16 23:54:11 +0100 |
commit | c6569209dab006e74ccecc0ede6ce7815ac8629c (patch) | |
tree | 32105de312055560c5e2b2fd8b0a089459d460d5 | |
parent | 850108886765e99e894f7613f49c1bab3650a0c2 (diff) | |
download | scala-c6569209dab006e74ccecc0ede6ce7815ac8629c.tar.gz scala-c6569209dab006e74ccecc0ede6ce7815ac8629c.tar.bz2 scala-c6569209dab006e74ccecc0ede6ce7815ac8629c.zip |
SI-6663: don't ignore type parameter on selectDynamic invocation
Fix mkInvoke to handle selectDynamic calls of the form
new C.foo[T].xyz
or
new C.foo[T].xyz :U
(where C extends Dynamic)
Without this patch, the type parameter was silently ignored, and
possibly inferred to a different.
This patch fixes mkInvoke to handle these cases, where ctxTree has
the form Select(TypeApply(fun, targs), nme) or Typed(...)
-rw-r--r-- | src/compiler/scala/tools/nsc/typechecker/Typers.scala | 7 | ||||
-rw-r--r-- | test/files/neg/t6663.check | 6 | ||||
-rw-r--r-- | test/files/neg/t6663.scala | 19 | ||||
-rw-r--r-- | test/files/run/t6663.check | 1 | ||||
-rw-r--r-- | test/files/run/t6663.scala | 17 |
5 files changed, 49 insertions, 1 deletions
diff --git a/src/compiler/scala/tools/nsc/typechecker/Typers.scala b/src/compiler/scala/tools/nsc/typechecker/Typers.scala index d3847de894..80785cee2f 100644 --- a/src/compiler/scala/tools/nsc/typechecker/Typers.scala +++ b/src/compiler/scala/tools/nsc/typechecker/Typers.scala @@ -3935,9 +3935,14 @@ trait Typers extends Modes with Adaptations with Tags { case t: ValOrDefDef => t.rhs case t => t } - val (outer, explicitTargs) = cxTree1 match { + val cxTree2 = cxTree1 match { + case Typed(t, tpe) => t // ignore outer type annotation + case t => t + } + val (outer, explicitTargs) = cxTree2 match { case TypeApply(fun, targs) => (fun, targs) case Apply(TypeApply(fun, targs), args) => (Apply(fun, args), targs) + case Select(TypeApply(fun, targs), nme) => (Select(fun, nme), targs) case t => (t, Nil) } def hasNamedArg(as: List[Tree]) = as.collectFirst{case AssignOrNamedArg(lhs, rhs) =>}.nonEmpty diff --git a/test/files/neg/t6663.check b/test/files/neg/t6663.check new file mode 100644 index 0000000000..aa4faa4a46 --- /dev/null +++ b/test/files/neg/t6663.check @@ -0,0 +1,6 @@ +t6663.scala:16: error: type mismatch; + found : String + required: Int + var v = new C(42).foo[String].get :Int + ^ +one error found diff --git a/test/files/neg/t6663.scala b/test/files/neg/t6663.scala new file mode 100644 index 0000000000..4a358dfbc5 --- /dev/null +++ b/test/files/neg/t6663.scala @@ -0,0 +1,19 @@ +import language.dynamics + +class C(v: Any) extends Dynamic { + def selectDynamic[T](n: String): Option[T] = Option(v.asInstanceOf[T]) + def applyDynamic[T](n: String)(): Option[T] = Option(v.asInstanceOf[T]) +} + +object Test extends App { + // this should be converted to + // C(42).selectDynamic[String]("foo").get + // causing a compile error. + + // but, before fixing SI-6663, became + // C(42).selectDynamic("foo").get, ignoring + // the [String] type parameter + var v = new C(42).foo[String].get :Int + println(v) +} + diff --git a/test/files/run/t6663.check b/test/files/run/t6663.check new file mode 100644 index 0000000000..d81cc0710e --- /dev/null +++ b/test/files/run/t6663.check @@ -0,0 +1 @@ +42 diff --git a/test/files/run/t6663.scala b/test/files/run/t6663.scala new file mode 100644 index 0000000000..6818d286d9 --- /dev/null +++ b/test/files/run/t6663.scala @@ -0,0 +1,17 @@ +import language.dynamics + +class C(v: Any) extends Dynamic { + def selectDynamic[T](n: String): Option[T] = Option(v.asInstanceOf[T]) + def applyDynamic[T](n: String)(): Option[T] = Option(v.asInstanceOf[T]) +} + +object Test extends App { + // this should be converted to + // C(42).selectDynamic[Int]("foo").get + // but, before fixing SI-6663, became + // C(42).selectDynamic[Nothing]("foo").get + // leading to a ClassCastException + var v = new C(42).foo[Int].get + println(v) +} + |