On Friday, 12 August 2016 at 15:35:50 UTC, sldkf wrote:
On Friday, 12 August 2016 at 02:09:21 UTC, Engine Machine wrote:
On Thursday, 11 August 2016 at 21:25:20 UTC, sldkf wrote:
On Thursday, 11 August 2016 at 20:27:01 UTC, Engine Machine
issue solved using a "template this parameter":
°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°
template Cow()
{
void soundImpl() { writeln("moo"); }
}
template Cat()
{
mixin AnimalSound;
void soundImpl() { writeln("meaow"); }
}
template Duck()
{
mixin Cat;
void soundImpl() { writeln("quack"); }
}
template AnimalSound()
{
void emittSound(this T)() { (cast(T) this).soundImpl(); }
// would also work with "this.soundImpl()"
}
struct Animal
{
mixin Duck;
}
void main()
{
Animal a;
a.emittSound;
}
°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°
https://dlang.org/spec/template.html#TemplateThisParameter
This is not the solution to the original problem.
template X(T)
{
int _len = 0;
int Length() { return _len; }
int length(this T)() { return (cast(T)this).Length(); }
}
template Y(T)
{
mixin X!T;
int Length() { return 3; }
}
Then calling length returns 0, while calling Length returns 3.
But we obviously want length to "follow" Length, yet it doesn't
due to D resolving length in X before it is mixed in Y!T.
