Nim does support your original example, e.g.
macro mkParser*(name: untyped, args: untyped): untyped =
# process name and args here
# generate the setup code(type & parser) with possibly
# compile time proc helpers
# generate the flag code directly here
# or with flag(..) which will be invoked later
discard
# if you demand autocompletion, this is a hack, but it's a very simple
solution: and it describes correctly the flag function in your dsl
proc flag*(names: varargs[string], help: string = "") =
discard
Run
If you demand flag to be explicitly defined, use a macro, not a compile time
function: this way you can
block:
assign tmpParser
flag(..)
Run
and generate code working on tmpParser in flag . This way you'll have your
macro mkParser and your macro flag with the right signature and autocompletion
