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author | Jason Zaugg <jzaugg@gmail.com> | 2013-01-13 17:42:48 +0100 |
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committer | Adriaan Moors <adriaan.moors@typesafe.com> | 2013-01-27 22:42:02 -0800 |
commit | a87d40960bfdb4a683c05d3430a8874cb4dcff36 (patch) | |
tree | a65ddd00ebdee081055d982f6408cbfc34e9e62c /test/files/pos | |
parent | 02963d724c512251ce66502226408091686989ee (diff) | |
download | scala-a87d40960bfdb4a683c05d3430a8874cb4dcff36.tar.gz scala-a87d40960bfdb4a683c05d3430a8874cb4dcff36.tar.bz2 scala-a87d40960bfdb4a683c05d3430a8874cb4dcff36.zip |
SI-6968 Simple Tuple patterns aren't irrefutable
Reverts part of c82ecab. The parser can't assume that
a pattern `(a, b)` will match, as results of
`.isInstanceOf[Tuple2]` can't be statically known until
after the typer.
The reopens SI-1336, SI-5589 and SI-4574, in exchange for fixing
this regression SI-6968. Keeping all of those fixed will require
a better definition of irrefutability, and some acrobatics to
ensure safe passage to the ambiguous trees through typechecking.
Diffstat (limited to 'test/files/pos')
-rw-r--r-- | test/files/pos/t1336.scala | 10 | ||||
-rw-r--r-- | test/files/pos/t5589.scala | 22 |
2 files changed, 0 insertions, 32 deletions
diff --git a/test/files/pos/t1336.scala b/test/files/pos/t1336.scala deleted file mode 100644 index 63967985c7..0000000000 --- a/test/files/pos/t1336.scala +++ /dev/null @@ -1,10 +0,0 @@ -object Foo { - def foreach( f : ((Int,Int)) => Unit ) { - println("foreach") - f(1,2) - } - - for( (a,b) <- this ) { - println((a,b)) - } -} diff --git a/test/files/pos/t5589.scala b/test/files/pos/t5589.scala deleted file mode 100644 index 69cbb20391..0000000000 --- a/test/files/pos/t5589.scala +++ /dev/null @@ -1,22 +0,0 @@ -class A { - // First three compile. - def f1(x: Either[Int, String]) = x.right map (y => y) - def f2(x: Either[Int, String]) = for (y <- x.right) yield y - def f3(x: Either[Int, (String, Int)]) = x.right map { case (y1, y2) => (y1, y2) } - // Last one fails. - def f4(x: Either[Int, (String, Int)]) = for ((y1, y2) <- x.right) yield ((y1, y2)) -/** -./a.scala:5: error: constructor cannot be instantiated to expected type; - found : (T1, T2) - required: Either[Nothing,(String, Int)] - def f4(x: Either[Int, (String, Int)]) = for ((y1, y2) <- x.right) yield ((y1, y2)) - ^ -./a.scala:5: error: not found: value y1 - def f4(x: Either[Int, (String, Int)]) = for ((y1, y2) <- x.right) yield ((y1, y2)) - ^ -./a.scala:5: error: not found: value y2 - def f4(x: Either[Int, (String, Int)]) = for ((y1, y2) <- x.right) yield ((y1, y2)) - ^ -three errors found -**/ -} |