Keywords as argnames in fun declarations

[paddor]

Crystal supports the use of keywords as arguments in method definitions (by using an external argument name) and also fun declarations (by just using it, using an external argument name results in compile-error).

Unfortunately, this makes the syntax highlighting trip. Here the issue with method definitions:

def foo(good : Bool, num : Int, alias s : String, property p : Symbol)
  puts "alias = #{s}"
  puts "num = #{num}"
  puts "property = #{p}"
end
foo good: true, num: 5, alias: "bla", property: :xyz

which looks like this on my machine:

And here the issue with fun declarations:

  fun zdir_resync(self : Void*, alias : LibC::Char*) : Void* # "LibC::Char*" has no color
  fun zframe_meta(self : Void*, property : LibC::Char*) : LibC::Char* # "property" wrongly has a color

Here's how it looks in my:

I just noticed these seem to be correctly recognized by Github's higlighting.

My vi -v says NVIM v0.1.5-719-gf1eb303.