On 10/2/12, Manu <turkeyman@gmail.com> wrote:
> Does anyone have any clever tricks that will work in this scenario? Some magic tuple syntax?

Without resorting to helper templates I only know of using this internal trick:

struct Event(Args...)
{
    static if (Args.length)
        alias Args T;
    else
        alias TypeTuple!(int, float) T;

    void F(T t) { }
}

Also there's a somewhat related bug but for variadic template functions with default arguments: http://d.puremagic.com/issues/show_bug.cgi?id=8687

On 2 October 2012 16:24, Andrej Mitrovic <andrej.mitrovich@gmail.com> wrote:

> On 10/2/12, Manu <turkeyman@gmail.com> wrote:
> > Does anyone have any clever tricks that will work in this scenario? Some magic tuple syntax?
>
> Without resorting to helper templates I only know of using this internal trick:
>
> struct Event(Args...)
> {
>     static if (Args.length)
>         alias Args T;
>     else
>         alias TypeTuple!(int, float) T;
>
>     void F(T t) { }
> }
>
> Also there's a somewhat related bug but for variadic template functions with default arguments: http://d.puremagic.com/issues/show_bug.cgi?id=8687
>

I think this is fine for my needs. Thanks!

On 2 October 2012 16:45, Manu <turkeyman@gmail.com> wrote:

> On 2 October 2012 16:24, Andrej Mitrovic <andrej.mitrovich@gmail.com>wrote:
>
>> On 10/2/12, Manu <turkeyman@gmail.com> wrote:
>> > Does anyone have any clever tricks that will work in this scenario? Some magic tuple syntax?
>>
>> Without resorting to helper templates I only know of using this internal trick:
>>
>> struct Event(Args...)
>> {
>>     static if (Args.length)
>>         alias Args T;
>>     else
>>         alias TypeTuple!(int, float) T;
>>
>>     void F(T t) { }
>> }
>>
>> Also there's a somewhat related bug but for variadic template functions with default arguments: http://d.puremagic.com/issues/show_bug.cgi?id=8687
>>
>
> I think this is fine for my needs. Thanks!
>

Actually, this leaves a problem...
Distinction between:
  Event x; // using defaults
and
  Event!() x; // explicitly selecting none (which would fall back to the
defaults)

Is such a distinction possible? I presume not...

On 10/2/12, Manu <turkeyman@gmail.com> wrote:
> Actually, this leaves a problem...
> Distinction between:
>   Event x; // using defaults
> and
>   Event!() x; // explicitly selecting none (which would fall back to the
> defaults)
>
> Is such a distinction possible? I presume not...
>

Well actually you can't use the first syntax at all with templates or templated types. :/

On 2 October 2012 18:56, Andrej Mitrovic <andrej.mitrovich@gmail.com> wrote:

> On 10/2/12, Manu <turkeyman@gmail.com> wrote:
> > Actually, this leaves a problem...
> > Distinction between:
> >   Event x; // using defaults
> > and
> >   Event!() x; // explicitly selecting none (which would fall back to the
> > defaults)
> >
> > Is such a distinction possible? I presume not...
> >
>
> Well actually you can't use the first syntax at all with templates or templated types. :/
>

Errr, really? If the template has default args, surely you don't need to
specify any template args?
I'm sure I've done that before... :/

On 10/2/12, Manu <turkeyman@gmail.com> wrote:
> Errr, really? If the template has default args, surely you don't need to
> specify any template args?
> I'm sure I've done that before... :/
>

The !() is required (it's like a sore thumb really..). I think this is
one of the first things I've ever complained about in the NG.

On 2 October 2012 19:06, Andrej Mitrovic <andrej.mitrovich@gmail.com> wrote:

> On 10/2/12, Manu <turkeyman@gmail.com> wrote:
> > Errr, really? If the template has default args, surely you don't need to
> > specify any template args?
> > I'm sure I've done that before... :/
> >
>
> The !() is required (it's like a sore thumb really..). I think this is
> one of the first things I've ever complained about in the NG.
>

Are you sure it's not fixed? I'm sure I do it all the time... :/ Or I'm smoking some really good stuff.

On 10/2/12, Manu <turkeyman@gmail.com> wrote:
> Are you sure it's not fixed? I'm sure I do it all the time... :/ Or I'm smoking some really good stuff.

I'd really like to see how you do it. If not, I'll have some of that stuff you're having, thanks. :p

On 2012-10-02 18:10, Manu wrote:

> Are you sure it's not fixed? I'm sure I do it all the time... :/
> Or I'm smoking some really good stuff.

It's not needed for functions templates. But it is needed for type templates.

-- 
/Jacob Carlborg