Can we extend Base.@kwdef to override default show() to print via keyword argument construction?

[NHDaly]

julia> Base.@kwdef struct Statistics
           seen_count::Int = 0
           recomputed_count::Int = 0
           invalidated_count::Int = 0
       end
Statistics

julia> stats = Statistics(seen_count=3, recomputed_count=2)
Statistics(3, 2, 0)

People use Base.@kwdef for structs where they want users to set the fields by name. Can we extend this macro to also provide a definition for Base.show() that prints the struct with all of its args by name, something like this?:

julia> stats = Statistics(seen_count=3, recomputed_count=2)
Statistics(seen_count = 3, recomputed_count = 2, invalidated_count = 0)

---

EDIT: oh, duh, I guess this isn't possible because if the user then wants to provide their own Base.show, there would be a double-definition error. :/

Is there any clever way around that?

Or could we maybe have something like @kwdef_and_show? Or another macro @kwshow that could be composed with this macro? :)

[NHDaly]

Or maybe via a parameter, like @kwdef kwshow=true struct S ... end?

[yuyichao]

A much cleaner way is to simply have a function that does the printing using keyword argument syntax and the user can simply use it with a single line of code.

[NHDaly]

Mm that's a good idea, @yuyichao.

Hehe I realized I could just do this instead of asking, so i've implemented the kwshow() argument based approach here:
#37519

But now that i'm here and see your comment, you're probably right.. Open to changing it per yours and others' feedback! :)

[nickrobinson251]

I think Parameters.jl defines a show method when using @with_kw
e.g.

julia> using Parameters

julia> @with_kw struct Statistics
              seen_count::Int = 0
              recomputed_count::Int = 0
              invalidated_count::Int = 0
          end
Statistics

julia> stats = Statistics(seen_count=3, recomputed_count=2)
Statistics
  seen_count: Int64 3
  recomputed_count: Int64 2
  invalidated_count: Int64 0

Maybe other packages do too :)
I don't know how it differs from Base's @kwdef (I think PkgTemplates switched to this over @kwdef for supporting Julia v1.0)