projects
/
ghc-hetmet.git
/ blob
commit
grep
author
committer
pickaxe
?
search:
re
summary
|
shortlog
|
log
|
commit
|
commitdiff
|
tree
history
|
raw
|
HEAD
[project @ 1999-01-27 15:01:03 by simonpj]
[ghc-hetmet.git]
/
ghc
/
tests
/
deriving
/
should_compile
/
drv001.hs
1
-- !!! canonical weird example for "deriving"
2
module ShouldSucceed where
3
4
data X a b
5
= C1 (T a)
6
| C2 (Y b)
7
| C3 (X b a)
8
deriving (Read, Show)
9
10
data Y b
11
= D1
12
| D2 (X Int b)
13
deriving (Read, Show)
14
15
data T a
16
= E1
17
18
instance Eq a => Show (T a) where
19
showsPrec = error "show"
20
instance Eq a => Read (T a) where
21
readsPrec = error "read"