Default Template Instantiation

[Stefan Koch]

On Thursday, 17 May 2018 at 08:37:01 UTC, Heromyth wrote:
> On Monday, 19 September 2016 at 22:59:53 UTC, Jonathan Marler 
> wrote:
>> On Monday, 19 September 2016 at 22:17:34 UTC, Mathias Lang 
>> wrote:
>>> [...]
>>
>> Good example, thanks for the information.
>
> Maybe the compiler can do more works to make the code more 
> readable. Here are my examples:
>
> template EventHandler(T=Object)
> {
>    alias EventHandler = void delegate(T sender);
> }
>
>
> void test01(EventHandler handler) // Error
> {
>   // It's what I want. However, it doesn't work.
> }
>
> void test02(EventHandler!() handler)
> {
>   // It works. Howerve, it ...
> }
>
> void test03()(EventHandler handler)
> {
>   // It works too. Howerve, it ...
> }
>
> void test04(EventHandler!string handler)
> {
>   // It's OK.
> }


If you want, take a look at dtemplate.d in the compiler source. :)
I would advise to do this when well rested and motivated.