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authorDavid Terei <davidterei@gmail.com>2011-07-20 11:09:03 -0700
committerDavid Terei <davidterei@gmail.com>2011-07-20 11:26:35 -0700
commit16514f272fb42af6e9c7674a9bd6c9dce369231f (patch)
treee4f332b45fe65e2a7a2451be5674f887b42bf199 /testsuite/tests/deSugar/should_compile/T3263-1.hs
parentebd422aed41048476aa61dd4c520d43becd78682 (diff)
downloadhaskell-16514f272fb42af6e9c7674a9bd6c9dce369231f.tar.gz
Move tests from tests/ghc-regress/* to just tests/*
Diffstat (limited to 'testsuite/tests/deSugar/should_compile/T3263-1.hs')
-rw-r--r--testsuite/tests/deSugar/should_compile/T3263-1.hs36
1 files changed, 36 insertions, 0 deletions
diff --git a/testsuite/tests/deSugar/should_compile/T3263-1.hs b/testsuite/tests/deSugar/should_compile/T3263-1.hs
new file mode 100644
index 0000000000..74249cd663
--- /dev/null
+++ b/testsuite/tests/deSugar/should_compile/T3263-1.hs
@@ -0,0 +1,36 @@
+-- Trac #3263. New kind of warning on ignored monadic bindings
+
+module T3263 where
+
+nullM :: IO ()
+nullM = return ()
+
+nonNullM :: IO Int
+nonNullM = return 10
+
+-- No warning
+t1 = do
+ nonNullM
+
+-- No warning
+t2 = nonNullM
+
+-- No warning
+t3 = do
+ nullM
+ nonNullM
+
+-- Warning
+t4 = do
+ nonNullM
+ nullM
+
+-- No warning
+t5 = do
+ _ <- nonNullM
+ nullM
+
+-- Warning
+t6 = mdo
+ nonNullM
+ nullM \ No newline at end of file