Running this code I would expect to get "ref" three times, but ...
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import std.stdio;
struct A {
int[128] data;
ref A opAdd(const ref A a) {
A cp = this;
cp.data[] += a.data[];
return cp;
}
}
void fun(A a) { writeln("copy"); }
void fun(const ref A a) { writeln("ref"); }
void main() {
A a, b;
fun(a + b); //prints "copy"
fun(A()); //prints "copy"
fun(a); //prints "copy"
}
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After some tests I concluded that is not possible to pass the
result of a+b as a reference (which is what interests me most)
and this creates an evident performance problem.
Is there any solution that I missed ?
