On Monday, 30 March 2015 at 02:53:36 UTC, Paul O'Neil wrote:
I'm registering a callback with some C code. The simplified
story is
here, but the actual code is on GitHub [1] at the end if you
care.
The call looks something like this.
void register(void(*fp)(void*), void* context);
I have a class that holds state for the callback and registers
itself:
final class Klass
{
void method()
{
register(callback_function, &this);
}
}
As of dmd 2.067, doing "&this" is deprecated. Is there an
idiomatic way
to do this?
[0] Actual code is at
https://github.com/todayman/dubik/blob/master/source/vibe/core/drivers/rx.d#L177
. The msg object eventually gets passed to the registration
function.
Thanks,
This is only deprecated for class not struct. This code below
works fine:
---
import std.stdio;
extern(C) void f2(void* ins) {
auto s = cast(S*)(ins);
writefln("f2():%s", s);
writefln("f2():%s", *s);
}
void f1(void* ins) {
auto s = cast(S*)(ins);
writefln("f1():%s", s);
writefln("f1():%s", *s);
}
struct S { // <<-- change to "class" to get deprecated message
int value = 10;
void f() {
f1(&this);
f2(&this);
}
}
void main()
{
auto s = S();
s.f();
}
---
bye,
lobo
