On Mon, Aug 03, 2020 at 08:16:57PM -0700, Ali Çehreli via Digitalmars-d-learn
wrote:
[...]
> UDAs were added to D by a request from Manu Evans and that's when I
> learned them. In one of Manu's use cases they would put a @Tweakable
> attribute to certain struct members. The effect of that attribut
On 8/2/20 8:00 PM, Cecil Ward wrote:
> Ali Çehreli’s book mentions them briefly with an example
> but that doesn’t seem to qualify as a realistic use-case.
The XML example I chose there qualifies as serialization like H. S. Teoh
mentions. UDAs on user-defined type members are for marking them f
On Mon, Aug 03, 2020 at 03:00:08AM +, Cecil Ward via Digitalmars-d-learn
wrote:
> When practically speaking would you use UDAs? A real-world use-case?
There are probably more use cases than this, but for me, their primary
usefulness is in declarative programming and compile-time introspection
On Monday, 3 August 2020 at 03:00:08 UTC, Cecil Ward wrote:
When practically speaking would you use UDAs? A real-world
use-case?
They are useful when you want to attach some kind of metadata to
the declarations for a library to read. For example, my script.d
looks for `@scriptable` for method
When practically speaking would you use UDAs? A real-world
use-case? I’ve seen them in use already for core language
features instead of keywords like "pure", and I suppose this
choice keeps the number of keywords down and the result is
perhaps easier to extend. The motivation for these usages
