Peter N Lewis wrote:
Prof. A Olowofoyeku (The African Chief) wrote:
BTW: a CString/pChar is type-compatible with zero-based arrays of char (e.g., var foo : array [0..1023] of char). I think you might have to use {$X+} in your code for this - but I don't remember (I always use it anyway).
So basically, CString is ^Char, but why then can it be accessed as an array?
Can any other pointers be accessed as arrays? Is this only for $X+?
if (s2 = nil) or (s2^ = #0)I know GPC defaults to always doing short circuit, but would that be better written or_else?
Dunno. I think that expression is one of the safest ways of dealing with pChar variables. I don't know what "or_else" means or how it differs from "or".
or_else always does short circuit evaluation.
Call it laziness, but there are many such places. I think the code becomes more readable (and a little easier to write when one doesn't have to consider whether `or' can be safely used or `or_else' must be used) ...
Fair enough, I just get nervous whenever I see if (s <> nil) or (s^ ...). In CW Pascal, they use | and & for short circuit evaluation - anything is better than plain or in my book which no Pascal standard ever defined to short circuit (or even left to right evaluation I think?).
Didn't I just point out that this is insecure, even on Turbo Pascal?