Simon Marlow wrote:
Neil Mitchell wrote:
Yes, or just don't use string gaps. ++ works just as well, and GHC will
optimise it away when applied to constant strings.
There are also other issues, such as ' in variable names (can cause
bits to be skipped in that line), /* as an operator, unboxed varids in
#define's
Yes, sure. (although the ' thing doesn't bite us
it seems to have bitten at least at one time: there is a workaround in
Data.Bits (see "wsib") :
(I# x#) `rotate` (I# i#) =
I# (word2Int# ((x'# `uncheckedShiftL#` i'#) `or#`
(x'# `uncheckedShiftRL#` (wsib -# i'#))))
where
x'# = int2Word# x#
i'# = word2Int# (int2Word# i# `and#` int2Word# (wsib -# 1#))
wsib = WORD_SIZE_IN_BITS# {- work around preprocessor problem
(??) -}
Isaac
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