Re: need this for name of type string

[Alex via Digitalmars-d-learn]

On Tuesday, 10 September 2019 at 10:32:29 UTC, Andre Pany wrote:
Hi,
following coding is throwing compiler error:
  need this for name of type string

The error disappears if I delete method0.
My gut feeling is, this is a compiler bug?

---
class C
{
    static this()
    {
        getT!(typeof(this))();
    }

    @Foo void method0(){}

    @Foo("abc") void method1(){}
}

struct Foo
{
    string name;
}

void getT(T)()
{
    import std.traits: hasUDA, getUDAs;

    static foreach(fieldName; __traits(allMembers, T))
    {
        static if (hasUDA!(__traits(getMember, T, fieldName), 
Foo))
        {
            pragma(msg, getUDAs!(__traits(getMember, T, 
fieldName), Foo)[0].name);
        }
    }
}

void main(){}
---

Kind regards
André

Don't think so. In case of @Foo, you don't instantiate an object. 
Therefore, name cannot exist. So... in this case, the UDA is a 
type, not an object you can query for a name.
It's more the like the example with SimpleAttr on the help page 
[1], I think.

[1] https://dlang.org/library/std/traits/get_ud_as.html