diff options
Diffstat (limited to 'testsuite/tests/typecheck/should_run/tcrun006.hs')
| -rw-r--r-- | testsuite/tests/typecheck/should_run/tcrun006.hs | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/testsuite/tests/typecheck/should_run/tcrun006.hs b/testsuite/tests/typecheck/should_run/tcrun006.hs new file mode 100644 index 0000000000..f3d0e13cef --- /dev/null +++ b/testsuite/tests/typecheck/should_run/tcrun006.hs @@ -0,0 +1,16 @@ +{-# LANGUAGE DatatypeContexts #-} +-- !!! Selectors for data and newtypes with contexts + +-- This program, reported in Aug'00 by Jose Emilio Labra Gayo +-- gave rise to a Lint error because the selector 'newout' below +-- was given the type +-- Eq f => NewT f -> f +-- but lacked a dictionary argument in its body. + +module Main where + +newtype (Eq f) => NewT f = NewIn { newout :: f } +data (Eq f) => DataT f = DataIn { dataout :: f } + +main = print (newout (NewIn "ok new") ++ dataout (DataIn " ok data")) + |