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author | Josh Suereth <Joshua.Suereth@gmail.com> | 2012-10-24 08:50:36 -0700 |
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committer | Josh Suereth <Joshua.Suereth@gmail.com> | 2012-10-24 08:50:36 -0700 |
commit | c0fac9ecabb7c5ea01cbb924e79aa4f14eb1e7d1 (patch) | |
tree | 6f6c128c1dc7b3119d6c01ee2abc7a55f2fb8d41 /test/files/neg | |
parent | 5b98644ff9bca3b853464f6555ed7ea9af716adf (diff) | |
parent | ff3e57beddfec9678b5be1c6031a45e483e1dd66 (diff) | |
download | scala-c0fac9ecabb7c5ea01cbb924e79aa4f14eb1e7d1.tar.gz scala-c0fac9ecabb7c5ea01cbb924e79aa4f14eb1e7d1.tar.bz2 scala-c0fac9ecabb7c5ea01cbb924e79aa4f14eb1e7d1.zip |
Merge pull request #1507 from retronym/ticket/6526
SI-6526 Tail call elimination should descend deeper.
Diffstat (limited to 'test/files/neg')
-rw-r--r-- | test/files/neg/t6526.check | 16 | ||||
-rw-r--r-- | test/files/neg/t6526.scala | 41 |
2 files changed, 57 insertions, 0 deletions
diff --git a/test/files/neg/t6526.check b/test/files/neg/t6526.check new file mode 100644 index 0000000000..606c18c301 --- /dev/null +++ b/test/files/neg/t6526.check @@ -0,0 +1,16 @@ +t6526.scala:8: error: could not optimize @tailrec annotated method inner: it contains a recursive call not in tail position + @tailrec def inner(i: Int): Int = 1 + inner(i) + ^ +t6526.scala:14: error: could not optimize @tailrec annotated method inner: it contains a recursive call not in tail position + @tailrec def inner(i: Int): Int = 1 + inner(i) + ^ +t6526.scala:20: error: could not optimize @tailrec annotated method inner: it contains a recursive call not in tail position + @tailrec def inner(i: Int): Int = 1 + inner(i) + ^ +t6526.scala:30: error: could not optimize @tailrec annotated method inner: it contains a recursive call not in tail position + @tailrec def inner(i: Int): Int = 1 + inner(i) + ^ +t6526.scala:39: error: could not optimize @tailrec annotated method inner: it contains a recursive call not in tail position + def inner(i: Int): Int = 1 + inner(i) + ^ +5 errors found diff --git a/test/files/neg/t6526.scala b/test/files/neg/t6526.scala new file mode 100644 index 0000000000..0bc249aa98 --- /dev/null +++ b/test/files/neg/t6526.scala @@ -0,0 +1,41 @@ +import scala.annotation.tailrec + +class TailRec { + def bar(f: => Any) = "" + + // transform the qualifier of a Select + bar { + @tailrec def inner(i: Int): Int = 1 + inner(i) + inner(0) + }.length + + // transform the body of a function + () => { + @tailrec def inner(i: Int): Int = 1 + inner(i) + inner(0) + } + + // transform the qualifier of a Select + { + @tailrec def inner(i: Int): Int = 1 + inner(i) + inner(0) + "" + }.length + + // The receiver of a tail recursive call must itself be transformed + object X { + @tailrec // okay, all other annotated methods should fail. + def foo: Any = { + { + @tailrec def inner(i: Int): Int = 1 + inner(i) + inner(0) + this + }.foo + } + } + + Some(new AnyRef) map { phooie => + @tailrec + def inner(i: Int): Int = 1 + inner(i) + } getOrElse 42 +} |