From 52fa311f885e20b05178bf28553f3952ba8a5df7 Mon Sep 17 00:00:00 2001 From: Adriaan Moors Date: Wed, 8 Aug 2012 13:40:38 +0200 Subject: SI-6205 make pt fully defined before inferTypedPattern refines my fix for SI-2038 (#981) by making pt fully defined before calling inferTypedPattern, instead of making the result of inferTypedPattern fully defined I finally realized my mistake by diffing the -Ytyper-debug output of compiling the variants with: ``` x match {case Holder(k: A[kt]) => (k: A[kt])} ``` and ``` (x: Any) match {case Holder(k: A[kt]) => (k: A[kt])} ``` --- test/files/pos/t6205.scala | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100644 test/files/pos/t6205.scala (limited to 'test/files/pos/t6205.scala') diff --git a/test/files/pos/t6205.scala b/test/files/pos/t6205.scala new file mode 100644 index 0000000000..02d924fe85 --- /dev/null +++ b/test/files/pos/t6205.scala @@ -0,0 +1,18 @@ +// original code by reporter +class A[T] +class Test1 { + def x(backing: Map[A[_], Any]) = + for( (k: A[kt], v) <- backing) + yield (k: A[kt]) +} + +// this tests same thing as above, but independent of library classes, +// earlier expansions eliminated as well as variance (everything's invariant) +case class Holder[A](a: A) +class Mapped[A] { def map[T](f: Holder[A] => T): Iterable[T] = ??? } +class Test2 { + def works(backing: Mapped[A[_]]): Iterable[A[_]] + = backing.map(x => + x match {case Holder(k: A[kt]) => (k: A[kt])} + ) +} \ No newline at end of file -- cgit v1.2.3