Compile time function execution...

[BCS]

Dave wrote:
> Bill Baxter wrote:
> 
>> Andrei Alexandrescu (See Website For Email) wrote:
>>
>>> Walter Bright wrote:
>>
>>
>>> That could be achieved with a watchdog process without changing the 
>>> compiler, and it's more flexible.
>>>
>>> I think you just let the compiler go and crunch at it. Since you 
>>> esentially have partial evaluation anyway, the execution process can 
>>> be seen as extended to compile time. If you have a non-terminating 
>>> program, that non-termination can be naturally manifest itself during 
>>> compilation=partial evaluation.
>>
>>
>> It would be nice though, if the compiler could trap sigint or 
>> something and spit out an error message about which part of the code 
>> it was trying to compile when you killed it.
>>
>> Otherwise debugging accidental infinite loops in compile time code 
>> becomes...interesting.
>>
>> --bb
> 
> 
> How about listing any CTFE with -v? That should be more reliable and 
> useful in other ways too.

On the line, how about a timeout flag for unattended builds? As it is 
DMD can now fail to error on bad code by just running forever. With 
template code it would seg-v sooner or later.