Concerns about using struct initializer in UDA?

[Nicholas Wilson via Digitalmars-d]

On Thursday, 11 May 2017 at 10:49:58 UTC, Andre Pany wrote:
> Hi,
>
> I know there are concerns about struct initialization in method 
> calls but what is about struct initializer in UDA?
>
> Scenario: I want to set several UDA values. At the moment I 
> have to create for each value a structure with exactly 1 field. 
> But it would be quite nice if I could use struct initialization 
> to group these values:
>
> struct Field
> {
> 	string location;
> 	string locationName;
> }
>
> struct Foo
> {
> 	@A = {locationName: "B"} int c; // <------------------
> }
>
> void main() {}
>
> Of course the syntax is questionable, it is just a proposal.
> What do you think?
>
> Kind regards
> André

I'm not sure if it isi what you're looking for but you can do

  struct Field
  {
  	string location;
  	string locationName;
  }

  struct Foo
  {
  	@Field("","B") int c;
  }

We use this for our compiler recognised attributes in LDC, see 
llvmAttr for an example
(https://github.com/ldc-developers/druntime/blob/ldc/src/ldc/attributes.d#L108)