My project does not allow dynamic memory. So I can't use delegates.

How can I declare a class member function with a callback function pointer?

On Monday, 27 January 2020 at 21:21:55 UTC, Herbert wrote:
> My project does not allow dynamic memory. So I can't use delegates.

delegates do not require dynamic memory.

&obj.member doesn't allocate any new memory (it just points to the existing object) yet yields a delegate.

On Monday, 27 January 2020 at 21:51:35 UTC, Adam D. Ruppe wrote:
> On Monday, 27 January 2020 at 21:21:55 UTC, Herbert wrote:
>> My project does not allow dynamic memory. So I can't use delegates.
>
> delegates do not require dynamic memory.
>
> &obj.member doesn't allocate any new memory (it just points to the existing object) yet yields a delegate.

As I understand the D language documentation says: delegates sometimes use dynamic memory.

On Mon, Jan 27, 2020 at 10:13:47PM +0000, Herbert via Digitalmars-d-learn wrote:
> On Monday, 27 January 2020 at 21:51:35 UTC, Adam D. Ruppe wrote:
> > On Monday, 27 January 2020 at 21:21:55 UTC, Herbert wrote:
> > > My project does not allow dynamic memory. So I can't use delegates.
> > 
> > delegates do not require dynamic memory.
> > 
> > &obj.member doesn't allocate any new memory (it just points to the existing object) yet yields a delegate.
> 
> As I understand the D language documentation says: delegates sometimes use dynamic memory.

Only if you're using a lambda or a delegate that captures local variables.


T

-- 
Fact is stranger than fiction.

On Monday, 27 January 2020 at 22:20:42 UTC, H. S. Teoh wrote:
> On Mon, Jan 27, 2020 at 10:13:47PM +0000, Herbert via Digitalmars-d-learn wrote:
>> On Monday, 27 January 2020 at 21:51:35 UTC, Adam D. Ruppe wrote:
>> > On Monday, 27 January 2020 at 21:21:55 UTC, Herbert wrote:
>> > > My project does not allow dynamic memory. So I can't use delegates.
>> > 
>> > delegates do not require dynamic memory.
>> > 
>> > &obj.member doesn't allocate any new memory (it just points to the existing object) yet yields a delegate.
>> 
>> As I understand the D language documentation says: delegates sometimes use dynamic memory.
>
> Only if you're using a lambda or a delegate that captures local variables.
>
>
> T

Chapter "Memory Management":

"D has built-in types that may be difficult to use without the GC: exceptions, strings, dynamic arrays, associative arrays, and delegate closures."

I would like to do something like this:

interface Timer
{
    void delegate pCallbackFunction(void);

    this();
    void Start(ushort milliseconds, pCallbackFunction);
    void Halt();
    void Restart();
}