'!' and naming conventions

[Gary Willoughby via Digitalmars-d-learn]

On Wednesday, 18 June 2014 at 20:55:36 UTC, cym13 wrote:
> Hello,
>
> I see a lot of functions and other stuff with a '!' in the name
> such as 'bitfields!' or 'ctRegex!'. What does it mean exactly?

I think this will be helpful:

http://nomad.so/2013/07/templates-in-d-explained/