I'm trying to write a macro that takes up a function definition and outputs
another one. It starts like:
macro mac(fdef)
@capture(fdef, begin function fname_ (args__) body__ end end)
:(function $(esc(fname)) ($(args...))
... end)
end
Macrotools are very convenient for getting the args, but I have issues
putting them back into place. I thought it wouldn't matter if they were
gensym'ed, but it turns out that arguments like (x::SomeType) will have
SomeType resolved in the macro's environment, which is obviously wrong.
So I need to escape hygiene. Something like $(esc(args)...), but that does
not work, as esc returns an Expr. I thought that $(map(esc, args)...) could
make sense, but it's complaining that:
:($(Expr(:error, "\"(escape x)\" is not a valid function argument name")))
Enter code here...
which makes little sense to me. Any ideas?
Cédric
