Re: Concerns about using struct initializer in UDA?

[Andre Pany via Digitalmars-d]

On Friday, 12 May 2017 at 10:23:34 UTC, Nicholas Wilson wrote:
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)

I think there are cases where this syntax is more readable and 
there are cases where struct initialization is more readable. In 
the example you gave, I do not know what is the second field 
about and having to mention the first field feels like a burden. 
As developer I want the choice to decide between these 2 syntax 
options.

Kind regards
André