Exclamation symbol "!" within functions syntax

[pascal111]

On Wednesday, 27 July 2022 at 11:09:19 UTC, Ali Çehreli wrote:
> On 7/27/22 04:00, pascal111 wrote:
>> I noticed more than once that the exclamation "!" is used 
>> within functions typing, and it seems like an operator with 
>> new use, for example "to!int()", ".tee!(l => sum += 
>> l.length)", "enforce!MissingArguments...", so what dose it 
>> means?
>> 
>
> The binary ! operator is used for specifying template 
> arguments. I have some explanation here:
>
>
> http://ddili.org/ders/d.en/templates.html#ix_templates.!,%20template%20instance
>
> Ali

I think I got it now, it's easy, I thought it so advanced D 
feature.