Re: Convert native character string to ASCII array of integers

Willem said:

> Richard Heathfield wrote:
> ) Tomás Ó hÉilidhe said:
> )> with:
> )>
> )>     while (*pc) *pos++ = strchr(ascii,*pc++) - ascii + ' ';
> )>
> )> I thought there might be a sequence point violation if pos and pc
> )> point to the same thing.. ?
> )
> ) It's a valid point. If there is a risk of that, then make sure that
the
> ) increments occur separately:
> 
> I disagree.  While pos and pc may point to the same thing, it's not
> the thing that is pointed to that gets incremented.

Ha! Let me think about this for a moment, before I do a second about-turn 
in the space of three articles.

WLOG we can reduce the expression to *pos++ = *pc++. pos and pc point to 
the same thing but, as you say, are different objects. The object whose 
value is being retrieved for the purpose of determining the value to be 
stored is not itself being modified at all except via the assignment, and 
in that respect is equivalent to x = x, which we all know is legal.

So yes, you're right, and the squeal of burning rubber is heard once more 
in the land.

-- 
Richard Heathfield <http://www.cpax.org.uk>
Email: -http://www.
+rjh@[EMAIL PROTECTED]
 users: <http://www.cpax.org.uk/prg/writings/googly.php>
"Usenet is a strange place" - dmr 29 July 1999