[MLton] Re: C-types

[Wesley W. Terpstra]

On May 14, 2006, at 4:56 AM, Matthew Fluet wrote:
>> On May 13, 2006, at 5:57 PM, Matthew Fluet wrote:
>>> Suggestions on how to pass rlim_t up to ML user code in a  
>>> portable manner?
>> What happens if the FFI lies and uses the wrong signedness?
>
> We can be burned by calling conventions that sign-extend signed  
> values but zero-extend unsigned values.  This came up with PowerPC  
> in the past.

But you've ensured that the size is correct now, right? So sign- 
extension will never be needed. I'm not really advocating this,  
though; I think an explicit sign conversion in SML would be ok..?