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Diffstat (limited to 'testsuite/tests/unsatisfiable/Unsatisfiable1.hs')
| -rw-r--r-- | testsuite/tests/unsatisfiable/Unsatisfiable1.hs | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/testsuite/tests/unsatisfiable/Unsatisfiable1.hs b/testsuite/tests/unsatisfiable/Unsatisfiable1.hs new file mode 100644 index 0000000000..357cd296a1 --- /dev/null +++ b/testsuite/tests/unsatisfiable/Unsatisfiable1.hs @@ -0,0 +1,21 @@ +{-# LANGUAGE DataKinds #-} + +module Unsatisfiable1 where + +import GHC.TypeError ( Unsatisfiable, unsatisfiable, ErrorMessage(Text) ) + +type Msg = Text "Cannot call 'uncallable'." + +uncallable :: Unsatisfiable Msg => () +uncallable = unsatisfiable @Msg + +uncallable' :: Unsatisfiable Msg => () +uncallable' = uncallable + +------------------------------------- + +unusual :: Unsatisfiable Msg => Char +unusual = 42 -- no error + +k :: Unsatisfiable (Text "No") => () +k = uncallable -- no error |