tcfail068.hs:14:9:
Could not deduce (s1 ~ s)
from the context (Constructed a)
bound by the type signature for
itgen :: Constructed a => (Int, Int) -> a -> IndTree s a
at tcfail068.hs:(12,1)-(14,31)
`s1' is a rigid type variable bound by
a type expected by the context: GHC.ST.ST s1 (IndTree s a)
at tcfail068.hs:13:9
`s' is a rigid type variable bound by
the type signature for
itgen :: Constructed a => (Int, Int) -> a -> IndTree s a
at tcfail068.hs:12:1
Expected type: GHC.ST.ST s (IndTree s1 a)
Actual type: GHC.ST.ST s (STArray s (Int, Int) a)
In the return type of a call of `newSTArray'
In the first argument of `runST', namely
`(newSTArray ((1, 1), n) x)'
tcfail068.hs:20:22:
Could not deduce (s ~ s1)
from the context (Constructed a)
bound by the type signature for
itiap :: Constructed a =>
(Int, Int) -> (a -> a) -> IndTree s a -> IndTree s a
at tcfail068.hs:(17,1)-(21,19)
`s' is a rigid type variable bound by
the type signature for
itiap :: Constructed a =>
(Int, Int) -> (a -> a) -> IndTree s a -> IndTree s a
at tcfail068.hs:17:1
`s1' is a rigid type variable bound by
a type expected by the context: GHC.ST.ST s1 (IndTree s a)
at tcfail068.hs:18:9
Expected type: STArray s1 (Int, Int) a
Actual type: IndTree s a
In the first argument of `writeSTArray', namely `arr'
In the first argument of `(>>)', namely
`writeSTArray arr i (f val)'
tcfail068.hs:24:35:
Could not deduce (s ~ s1)
from the context (Constructed a)
bound by the type signature for
itrap :: Constructed a =>
((Int, Int), (Int, Int)) -> (a -> a) -> IndTree s a -> IndTree s a
at tcfail068.hs:(24,1)-(32,41)
`s' is a rigid type variable bound by
the type signature for
itrap :: Constructed a =>
((Int, Int), (Int, Int)) -> (a -> a) -> IndTree s a -> IndTree s a
at tcfail068.hs:24:1
`s1' is a rigid type variable bound by
a type expected by the context: GHC.ST.ST s1 (IndTree s a)
at tcfail068.hs:24:29
Expected type: GHC.ST.ST s1 (IndTree s a)
Actual type: GHC.ST.ST s (IndTree s a)
In the return type of a call of itrap'
In the first argument of `runST', namely `(itrap' i k)'
tcfail068.hs:36:46:
Could not deduce (s ~ s1)
from the context (Constructed b)
bound by the type signature for
itrapstate :: Constructed b =>
((Int, Int), (Int, Int))
-> (a -> b -> (a, b))
-> ((Int, Int) -> c -> a)
-> (a -> c)
-> c
-> IndTree s b
-> (c, IndTree s b)
at tcfail068.hs:(36,1)-(45,66)
`s' is a rigid type variable bound by
the type signature for
itrapstate :: Constructed b =>
((Int, Int), (Int, Int))
-> (a -> b -> (a, b))
-> ((Int, Int) -> c -> a)
-> (a -> c)
-> c
-> IndTree s b
-> (c, IndTree s b)
at tcfail068.hs:36:1
`s1' is a rigid type variable bound by
a type expected by the context: GHC.ST.ST s1 (c, IndTree s b)
at tcfail068.hs:36:40
Expected type: GHC.ST.ST s1 (c, IndTree s b)
Actual type: GHC.ST.ST s (c, IndTree s b)
In the return type of a call of itrapstate'
In the first argument of `runST', namely `(itrapstate' i k s)'