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author | Adriaan Moors <adriaan.moors@epfl.ch> | 2012-08-09 13:30:54 +0200 |
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committer | Adriaan Moors <adriaan.moors@epfl.ch> | 2012-08-09 14:30:15 +0200 |
commit | 9108b2506c543587c92b10c83fcb650fcda425eb (patch) | |
tree | 86a43d037da830e962bcab40c7a00ded229a1d0c /test/files/pos | |
parent | e232a614dd5402f59fb5bcb6031defe47e7e13f3 (diff) | |
download | scala-9108b2506c543587c92b10c83fcb650fcda425eb.tar.gz scala-9108b2506c543587c92b10c83fcb650fcda425eb.tar.bz2 scala-9108b2506c543587c92b10c83fcb650fcda425eb.zip |
SI-6022 cleaner model of variable equality modulo <:
a more conservative "excludes": no need to reason about types
(TODO: check we don't get any spurious unreachability errors
in the eclipse build, which is a good canary for this kind of thing)
Diffstat (limited to 'test/files/pos')
-rw-r--r-- | test/files/pos/t6022b.scala | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/test/files/pos/t6022b.scala b/test/files/pos/t6022b.scala new file mode 100644 index 0000000000..6ceb928162 --- /dev/null +++ b/test/files/pos/t6022b.scala @@ -0,0 +1,20 @@ +trait A +trait B +trait C +trait AB extends B with A + +// two types are mutually exclusive if there is no equality symbol whose constant implies both +object Test extends App { + def foo(x: Any) = x match { + case _ : C => println("C") + case _ : AB => println("AB") + case _ : (A with B) => println("AB'") + case _ : B => println("B") + case _ : A => println("A") + } + + foo(new A {}) + foo(new B {}) + foo(new AB{}) + foo(new C {}) +} |