Hi all,
hugs thinks that
show (0/0 :: Double)
is "nan", but it will only read "NaN". I'd suggest changing the
behaviour of show rather than that of read, so as to match GHC:
Prelude> show (0/0 :: Double)
"NaN"
Prelude> read "nan" :: Double
*** Exception: Prelude.read: no parse
Prelude> read "NaN" :: Double
NaN
The result of the show seeme to come from sprintf in doubleToString
(src/machdep.c); this C program also prints "nan":
#include <stdio.h>
int main(void) {
char b[100];
sprintf(b, "%e", (double) 0/0);
printf("%s\n", b);
return 0;
}
While building CVS/darcs hugs I got
darcs get --partial http://darcs.haskell.org/hsc2hs
Directory '/home/ian/code/hugs/hugs98/hsc2hs' already exists, creating
repository as '/home/ian/code/hugs/hugs98/hsc2hs_0'
I think due to an empty CVS directory; I had to jiggle them around for
it to build later on.
I also got
/usr/bin/find: invalid predicate `-wholename'
thrice. Replacing -wholename with -path in libraries/tools/make_bootlib
let the build go through, but I'm not sure if this is either (a) correct
or (b) a superset of the portability of -wholename.
Thanks
Ian
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