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Hello, I have this code:
import core.lifetime : move, forward;
import std.stdio : writeln;
struct Foo{
int i;
static auto make(int i){
Foo tmp;
tmp.i = i;
return move(tmp);
}
this(scope const ref typeof(this) rhs){
this.i = rhs.i;
writeln("copy");
}
this(T)(scope const T rhs)
if(is(immutable T == immutable typeof(this))){
this.i = rhs.i;
writeln("move");
}
}
auto foo(T)(auto ref T x){
return Foo(forward!x);
}
void main(){
Foo x = foo(Foo.make(1));
writeln("end");
}
When is this code compiled with 2.098.1 then it print:
Error: Cannot define both an rvalue constructor and a copy constructor for `struct Foo`
Template instance `__ctor!(Foo)` creates a rvalue constructor for `struct Foo`
Error: template instance `onlineapp.Foo.__ctor!(Foo)` error instantiating
instantiated from here: `foo!(Foo)`
When is compiled by dmd-beta/dmd-nightly then it works fine.
Is dmd-beta/dmd-nightly with bug or is this new valid behaviour?