summaryrefslogtreecommitdiff
path: root/test/files
diff options
context:
space:
mode:
Diffstat (limited to 'test/files')
-rw-r--r--test/files/neg/bug1275.check4
-rw-r--r--test/files/neg/bug1275.scala14
2 files changed, 18 insertions, 0 deletions
diff --git a/test/files/neg/bug1275.check b/test/files/neg/bug1275.check
new file mode 100644
index 0000000000..6ff92a7823
--- /dev/null
+++ b/test/files/neg/bug1275.check
@@ -0,0 +1,4 @@
+bug1275.scala:13: error: The kind of type MyType does not conform to the expected kind of type MyType[+t] <: TestCovariance.this.Seq[t] in trait Seq.
+ def span[a, s <: Seq[a] { type MyType <: s } ](xs: s): s = xs f
+ ^
+one error found
diff --git a/test/files/neg/bug1275.scala b/test/files/neg/bug1275.scala
new file mode 100644
index 0000000000..04c66400c8
--- /dev/null
+++ b/test/files/neg/bug1275.scala
@@ -0,0 +1,14 @@
+// tested using Scala compiler version 2.6.0-RC1 -- (c) 2002-2007 LAMP/EPFL
+
+// prompted by "Covariant return types" mailing list question
+object TestCovariance {
+
+ // see Type constructor polymorphism in http://www.scala-lang.org/docu/changelog.html
+ trait Seq[+t] {
+ type MyType[+t] <: Seq[t]
+
+ def f: MyType[t]
+ }
+
+ def span[a, s <: Seq[a] { type MyType <: s } ](xs: s): s = xs f
+}