syntax question on parameter lists

S06 shows how to define named-only parameters, "marked with a prefix :".  But no example shows anything more than a bare parameter name.  No type is ever given!

Looking through my copy of STD.pm, I'm baffled, as it seems not to take types in parameter lists at all.

So, is it
  method bytes ( Encoding :$encoding ) returns Int

or 

  method bytes ( : Encoding $encoding ) returns Int

?

I'm guessing that the latter would be confused with use of : after the invocant, and it follows that

  method bytes (Encoding :encoding($override_encoding)) returns Int

would work.

• syntax question on parameter lists by John M. Dlugosz
• Re: syntax question on parameter lists by Larry Wall
• Re: syntax question on parameter lists by Patrick R. Michaud
• Re: syntax question on parameter lists by Larry Wall