macro pragma: param's default value not support?

[aiac]

the post not allow edit

UPDATE HERE:

> 
>     macro foo(tag: static string = "", p: untyped): untyped =
>       result = p
>     
>     proc bar() {.foo.} =    ## Error: invalid pragma: foo
>       discard
>     
>     proc bar() {.foo: "".} =    ## this works
>       discard
>     
>     
>     Run