On Mon, Jul 08, 2002 at 10:19:20PM +0100, Alastair Reid wrote: > > >> For what it's worth, I ran Ian's program on Hugs (with minor > >> changes: Hugs gets confused by the use of type synonyms in ffi > >> decls) > > > Is this a hugs bug or am I being non-portable? > > I'd class it as a reflection of the immaturity of Hugs' new ffi > implementation - but others might reasonably call it a Hugs bug :-)
Sorry if my language was too strong, I just wanted to check I was working within the FFI spec. > For them that care, the problems in Hugs are: [snip] Thanks. > > I reached this point having discovered that the Haskell equivalent > > of "keypad(stdscr, TRUE)" (insert digression/rant about having to > > assume bool is a numerical type in curses here) had no effect but > > using the result of initscr worked fine. > > I presume the rant would be to the effect that it's painful that the > ffi doesn't handle macros such as TRUE or perhaps the plausible but not > always correct use of 0/1 to marshall False/True? It was more directed at the lack of assumptions curses allows you to make than the Haskell side, but even so the answer is "not really". > The short answer is that GreenCard and friends exist for that very > purpose. I'm currently using hsc2hs and have code like this: type NBool = #type bool cTRUE :: NBool cTRUE = #const TRUE The problem comes when bool is, say, a 72bit structure and #type can't provide a suitable Haskell type. I'm happy to be corrected on this, particularly if it makes my life easier :-) I'll have a better look at GreenCard (I think I decided it was more complex than hsc2hs for what I was doing at the time, but I might need the extra complexity now) some time and see if it can help me out. Thanks Ian _______________________________________________ Glasgow-haskell-bugs mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
