Are dynamic arrays passed by value? (Was: TList)
kb3ctd2 at yahoo.com
Wed Mar 19 06:00:40 PDT 2008
"Ary Borenszweig" <ary at esperanto.org.ar> wrote in message
news:frqsik$1ngj$1 at digitalmars.com...
> Writing that code without "ref" in "add" and "get" didn't work well the
> first time. I got array index out of bounds. Aren't dynamic arrays always
> passed by reference?
Yes, but the reference isn't passed by reference ;)
It's the same as something like:
void foo(char* s)
s = realloc(s, 20);
Now s points to a new place in memory. Yes, the contents pointed to by s
were passed by reference, but the caller doesn't see the update to s.
In the same way:
void foo(char s)
s ~= "hi!";
The local variable 's' is updated in the function, but the caller may not
see those changes.
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