From 1413713bddd1d14e9cb51ca5b3f2d10f82000b6e Mon Sep 17 00:00:00 2001 From: Adriaan Moors Date: Sat, 21 Jul 2012 08:51:50 +0200 Subject: SI-6089 test file for pt2 test that matchEnd that's an argument of || that's in tail position is in tail position --- test/files/pos/t6089b.scala | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100644 test/files/pos/t6089b.scala (limited to 'test') diff --git a/test/files/pos/t6089b.scala b/test/files/pos/t6089b.scala new file mode 100644 index 0000000000..ff7ca157eb --- /dev/null +++ b/test/files/pos/t6089b.scala @@ -0,0 +1,18 @@ +// this crazy code simply tries to nest pattern matches so that the last call is in a tricky-to-determine +// tail position (my initial tightenign of tailpos detection for SI-6089 ruled this out) +class BKTree { + @annotation.tailrec + final def -?-[AA](a: AA): Boolean = this match { + case BKTreeEmpty => false + case BKTreeNode(v) => { + val d = 1 + d == 0 || ( Map(1 -> this,2 -> this,3 -> this) get d match { + case None => false + case Some(w) => w -?- a // can tail call here (since || is shortcutting) + }) + } + } +} + +object BKTreeEmpty extends BKTree +case class BKTreeNode[A](v: A) extends BKTree \ No newline at end of file -- cgit v1.2.3