diff options
Diffstat (limited to 'test')
-rw-r--r-- | test/files/neg/t1503.check | 8 | ||||
-rw-r--r-- | test/files/neg/t1503.flags | 1 | ||||
-rw-r--r-- | test/files/neg/t1503.scala | 8 | ||||
-rw-r--r-- | test/files/run/t1503.check | 1 | ||||
-rw-r--r-- | test/files/run/t1503.scala | 20 | ||||
-rw-r--r-- | test/files/run/t1503_future.flags | 1 | ||||
-rw-r--r-- | test/files/run/t1503_future.scala | 17 |
7 files changed, 56 insertions, 0 deletions
diff --git a/test/files/neg/t1503.check b/test/files/neg/t1503.check new file mode 100644 index 0000000000..7adeea20f3 --- /dev/null +++ b/test/files/neg/t1503.check @@ -0,0 +1,8 @@ +t1503.scala:7: warning: The value matched by Whatever is bound to n, which may be used under the +unsound assumption that it has type Whatever.type, whereas we can only safely +count on it having type Any, as the pattern is matched using `==` (see SI-1503). + def matchWhateverCCE(x: Any) = x match { case n @ Whatever => n } + ^ +error: No warnings can be incurred under -Xfatal-warnings. +one warning found +one error found diff --git a/test/files/neg/t1503.flags b/test/files/neg/t1503.flags new file mode 100644 index 0000000000..e93641e931 --- /dev/null +++ b/test/files/neg/t1503.flags @@ -0,0 +1 @@ +-Xlint -Xfatal-warnings
\ No newline at end of file diff --git a/test/files/neg/t1503.scala b/test/files/neg/t1503.scala new file mode 100644 index 0000000000..9877f99d0a --- /dev/null +++ b/test/files/neg/t1503.scala @@ -0,0 +1,8 @@ +object Whatever { + override def equals(x: Any) = true +} + +class Test { + // when left to its own devices, and not under -Xfuture, the return type is Whatever.type + def matchWhateverCCE(x: Any) = x match { case n @ Whatever => n } +}
\ No newline at end of file diff --git a/test/files/run/t1503.check b/test/files/run/t1503.check new file mode 100644 index 0000000000..43eceb0229 --- /dev/null +++ b/test/files/run/t1503.check @@ -0,0 +1 @@ +whoops diff --git a/test/files/run/t1503.scala b/test/files/run/t1503.scala new file mode 100644 index 0000000000..1be0e74ac2 --- /dev/null +++ b/test/files/run/t1503.scala @@ -0,0 +1,20 @@ +object Whatever { + override def equals(x: Any) = true +} + +object Test extends App { + // this should make it abundantly clear Any is the best return type we can guarantee + def matchWhatever(x: Any): Any = x match { case n @ Whatever => n } + // when left to its own devices, and not under -Xfuture, the return type is Whatever.type + def matchWhateverCCE(x: Any) = x match { case n @ Whatever => n } + + // just to exercise it a bit + assert(matchWhatever(1) == 1) + assert(matchWhatever("1") == "1") + + try { + matchWhateverCCE("1"): Whatever.type + } catch { + case _: ClassCastException => println("whoops") + } +}
\ No newline at end of file diff --git a/test/files/run/t1503_future.flags b/test/files/run/t1503_future.flags new file mode 100644 index 0000000000..112fc720a0 --- /dev/null +++ b/test/files/run/t1503_future.flags @@ -0,0 +1 @@ +-Xfuture
\ No newline at end of file diff --git a/test/files/run/t1503_future.scala b/test/files/run/t1503_future.scala new file mode 100644 index 0000000000..1e3daad761 --- /dev/null +++ b/test/files/run/t1503_future.scala @@ -0,0 +1,17 @@ +object Whatever { + override def equals(x: Any) = true +} + +object Test extends App { + // this should make it abundantly clear Any is the best return type we can guarantee + def matchWhatever(x: Any): Any = x match { case n @ Whatever => n } + // when left to its own devices, and not under -Xfuture, the return type is Whatever.type + def matchWhateverCCE(x: Any) = x match { case n @ Whatever => n } + + // just to exercise it a bit + assert(matchWhatever(1) == 1) + assert(matchWhatever("1") == "1") + + assert(matchWhateverCCE(1) == 1) + assert(matchWhateverCCE("1") == "1") +}
\ No newline at end of file |