extern(C++, ns)
JohnCK via Digitalmars-d
digitalmars-d at puremagic.com
Wed Jan 20 09:25:56 PST 2016
On Wednesday, 20 January 2016 at 16:38:19 UTC, Marc Schütz wrote:
> // a.d
> module a;
>
> extern(C++, ns) {
> void fooa();
> void bar();
> }
>
> // b.d
> module b;
>
> extern(C++, ns) {
> void foob();
> }
> void bar();
>
> // main.d
> import a, b;
>
> void main() {
> fooa(); // ok
> foob(); // ok
> bar(); // Error: b.bar at b.d(6) conflicts with
> a.ns.bar at a.d(5)
> // let's try to disambiguate: we want ns.bar
> ns.bar(); // Error: a.ns at a.d(3) conflicts with b.ns at
> b.d(3)
> a.ns.bar(); // works, but requires superfluous `a`, even
> though
> // `ns` already makes it unambiguous
> }
I think the first error is correct:
> bar(); // Error: b.bar at b.d(6) conflicts with
> a.ns.bar at a.d(5)
So you have two functions bar() one inside 'ns' in module a and
"outside" 'ns' in module b.
Now, the last 2 errors, Mark Schutz said:
> a.ns.bar(); // works, but requires superfluous `a`, even
> though
> // `ns` already makes it unambiguous
Question: What happens if you do this: using "ns1" in "module a"
and "ns2" in "module b" and do:
ns1.bar();
?
Because you can't have more than one namespaces with the same
name in C++, right?
JohnCK.
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