• codic (15/15) Aug 25 2020 I'd like to be able to change the callback of a vibe.d Timer (eg
• FreeSlave (6/21) Aug 27 2020 I did not try it myself, but you can make an object which is
• James Blachly (6/14) Aug 27 2020 Would creating a dynamic redirection function as delegate serve

codic <codic linuxmail.org> writes:

I'd like to be able to change the callback of a vibe.d Timer (eg 
created with 
http://vibe-core.dpldocs.info/v1.9.3/vibe.core.core.createTimer.html) after
creation, something like:

auto timer = createTimer();
timer.rearm(duration, /*...*/);
timer.callback = delegate {
    // things
}

An alternative method would be to recreate the timer, like so:

auto timer = createTimer();
timer.rearm(duration, /*...*/);
auto timer = createTimer();
timer.rearm(duration - timer.elapsed);

However, I can't find an `elapsed` property or similar in the 
documentation.

FreeSlave <freeslave93 gmail.com> writes:

On Tuesday, 25 August 2020 at 18:42:53 UTC, codic wrote:
 I'd like to be able to change the callback of a vibe.d Timer 
 (eg created with 
 http://vibe-core.dpldocs.info/v1.9.3/vibe.core.core.createTimer.html) after
creation, something like:

 auto timer = createTimer();
 timer.rearm(duration, /*...*/);
 timer.callback = delegate {
    // things
 }

 An alternative method would be to recreate the timer, like so:

 auto timer = createTimer();
 timer.rearm(duration, /*...*/);
 auto timer = createTimer();
 timer.rearm(duration - timer.elapsed);

 However, I can't find an `elapsed` property or similar in the 
 documentation.

I did not try it myself, but you can make an object which is 
accessible from both callback scope and outside scope. Depending 
on the state of the object it will call different functions. So 
if you want to change the callback in the meantime, you just 
change the state of the object.

James Blachly <james.blachly gmail.com> writes:

On Tuesday, 25 August 2020 at 18:42:53 UTC, codic wrote:
 I'd like to be able to change the callback of a vibe.d Timer 
 (eg created with 
 http://vibe-core.dpldocs.info/v1.9.3/vibe.core.core.createTimer.html) after
creation, something like:

 auto timer = createTimer();
 timer.rearm(duration, /*...*/);
 timer.callback = delegate {
    // things
 }

Would creating a dynamic redirection function as delegate serve 
your purpose?

https://dlang.org/library/std/functional/to_delegate.html

You can also pass object having `opCall` to `to_delegate` and th 
is could also provide dynamic dispatch.