|Bill Allombert on Mon, 23 Sep 2002 16:42:10 +0200|
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|Re: Is this specified ?|
On Sun, Sep 22, 2002 at 05:45:42PM +0200, Thomas Baruchel wrote: > Hi, > > I noticed that > > until(a==(a+=b), ... > > works (I want to increment a with b and stop when b is 0 > > BUT > > may I consider this as something fully specified (ie. standard, > portable, comprehensible, or whatever you want) or not ? Avoid it. This is confusing, and will probably break GP2C with some C compilers. Within GP, you stress the memory handler more than what is neccessary. until(a==(a+=b),SEQ) is equivalent to until(!b,SEQ;a+=b) A remainder: -- until evaluate the condition *after* the sequence. -- You can use 'break' to go out of loop. -- You can use a dummy if(1,SEQ1;SEQ2) to emulate the comma operator in C and perl. Cheers, Bill.