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author | Martin Odersky <odersky@gmail.com> | 2006-11-17 17:31:51 +0000 |
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committer | Martin Odersky <odersky@gmail.com> | 2006-11-17 17:31:51 +0000 |
commit | f6183ef4b030030606f46fe2463d325e39ae6174 (patch) | |
tree | 9f9630626ff7dceb0ec1a577c3765600a5be3424 /test/files/neg | |
parent | 7106a3e0e1ec4bf27ba7f8b23ae32a37c579243c (diff) | |
download | scala-f6183ef4b030030606f46fe2463d325e39ae6174.tar.gz scala-f6183ef4b030030606f46fe2463d325e39ae6174.tar.bz2 scala-f6183ef4b030030606f46fe2463d325e39ae6174.zip |
fixed bugs 802 and 807 (recursive lub problems).
Changes system so that now an approximation of lub/glb is computed.
Diffstat (limited to 'test/files/neg')
-rw-r--r-- | test/files/neg/lubs.check | 16 | ||||
-rw-r--r-- | test/files/neg/lubs.scala | 26 |
2 files changed, 42 insertions, 0 deletions
diff --git a/test/files/neg/lubs.check b/test/files/neg/lubs.check new file mode 100644 index 0000000000..e17e897f45 --- /dev/null +++ b/test/files/neg/lubs.check @@ -0,0 +1,16 @@ +lubs.scala:11 error: type mismatch; + found : test1.this.A[test1.this.A[test1.this.A[scala.Any]]] + required: test1.this.A[test1.this.A[test1.this.A[test1.this.A[scala.Any]]]] + val x4: A[A[A[A[Any]]]] = f + ^ +lubs.scala:24 error: type mismatch; + found : test2.this.A{type T >: test2.this.C with test2.this.D <: test2.this.A} + required: test2.this.A{type T >: scala.Null <: test2.this.A{type T >: scala.Null <: test2.this.A}} + val x3: A { type T >: Null <: A { type T >: Null <: A } } = f + ^ +lubs.scala:25 error: type mismatch; + found : test2.this.A{type T >: test2.this.C with test2.this.D <: test2.this.A} + required: test2.this.A{type T >: scala.Null <: test2.this.A{type T >: scala.Null <: test2.this.A{type T >: scala.Null <: test2.this.A}}} + val x4: A { type T >: Null <: A { type T >: Null <: A { type T >: Null <: A } } } = f + ^ +three errors found diff --git a/test/files/neg/lubs.scala b/test/files/neg/lubs.scala new file mode 100644 index 0000000000..3524fa4d87 --- /dev/null +++ b/test/files/neg/lubs.scala @@ -0,0 +1,26 @@ +object test1 { + abstract class A[+T] + class C extends A[C] + class D extends A[D] + + def f = if(1 == 2) new C else new D + + val x1: A[Any] = f + val x2: A[A[Any]] = f + val x3: A[A[A[Any]]] = f + val x4: A[A[A[A[Any]]]] = f +} + +object test2 { + + abstract class A { type T } + class C extends A { type T = C } + class D extends A { type T = D } + + def f = if (1 == 2) new C else new D + + val x1: A { type T } = f + val x2: A { type T >: Null <: A } = f + val x3: A { type T >: Null <: A { type T >: Null <: A } } = f + val x4: A { type T >: Null <: A { type T >: Null <: A { type T >: Null <: A } } } = f +} |