Evaluation order of index expressions
Johannes Pfau via Digitalmars-d
digitalmars-d at puremagic.com
Mon May 25 10:21:04 PDT 2015
Am Mon, 25 May 2015 09:40:34 -0700
schrieb Andrei Alexandrescu <SeeWebsiteForEmail at erdani.org>:
> On 5/24/15 11:13 PM, Iain Buclaw via Digitalmars-d wrote:
> > The context here involves concurrency where bar() calls yield and
> > makes changes to foo before returning to assign the updated results.
>
> We're not addressing that. += is not supposed to do concurrency
> magic. -- Andrei
It's not += doing the magic, it's bar(). And it's not limited to
concurrency, it happens with every side effect:
import std.stdio;
void main()
{
int a = 0;
int bar()
{
a++;
return a;
}
a += bar(); // => a = a + bar()
writeln(a);
}
DMD: 2
GDC: 1
which one is correct?
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