Class member functions not substituted for MultiParamTypeClasses
When the following code is compiled with "-O2 -ddump-rule-firings" the rule is not fired: presumably because the simplifier does not recognize that (+++) = ex_or.
{-# LANGUAGE MultiParamTypeClasses, FunctionalDependencies #-}
class Ex2 a b c | a b -> c where
(+++) :: a -> b -> c
instance Ex2 Bool Bool Bool where
(+++) = ex_or
{-# INLINE [2] ex_or #-}
ex_or = (||)
{-# RULES
"force-inline" forall a b . ex_or a b = a || b
#-}
main = print (True +++ True)
Trac metadata
Trac field | Value |
---|---|
Version | 8.0.1 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |