[mercury-users] waiting for an enter

[Tom Wouters]

Fergus Henderson wrote:
> On 27-May-2003, Tom Wouters <tom.wouters1 at student.kuleuven.ac.be> wrote:
> 
>>i was trying to write an interactive application which requires the 
>>mercury program to wait for an enter on stdin a few times.
>>
>>i tried
>>
>>io__read_line(_R1),
>>...
>>io__read_line(_R2),
>>...
> 
> 
> That should work fine.
> It certainly works fine for me (I just tested it).
> What OS are you using?

debian/linux, but i think i know what causes the problem,
part of the program uses a c-library which uses the sig_io to signal 
when a new message has arrived. I guess this is causing the read to 
continue when a message is being received instead of when enter was hit.

when writing the same program in C it exibits the same problems, so 
probably there isn't much to do about it, except checking that the input 
is more dan 0 bytes of length and waiting again in a recursion-loop

Tom
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