Re: [Haskell-cafe] [Haskell] ANNOUNCE: system-filepath 0.4.5 and system-fileio 0.3.4

On Thu, Feb 09, 2012 at 11:40:28AM -0800, John Meacham wrote:

On Thu, Feb 9, 2012 at 11:23 AM, Ian Lynagh wrote:

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On Thu, Feb 09, 2012 at 04:52:16AM -0800, John Meacham wrote:

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Since CSigSet has "sigset_t" associated with it, 'Ptr CSigSet' ends up turning into 'sigset_t *' in the generated code. (Ptr (Ptr CChar)) turns into char** and so forth.

What does the syntax for associating sigset_t with CSigSet look like?

There currently isn't a user accessable once,

My current syntax idea is.

data CFile = foreign "stdio.h FILE"

but it doesn't extend easily to 'newtype's or maybe a {-# CTYPE "FILE" #-} pragma...

I've now implemented this in GHC. For now, the syntax is: type {-# CTYPE "some C type" #-} Foo = ... newtype {-# CTYPE "some C type" #-} Foo = ... data {-# CTYPE "some C type" #-} Foo = ... The magic for (Ptr a) is built in to the compiler. Thanks Ian