Method: Multimethod::Parameter#score

Defined in:

lib/multimethod/parameter.rb

#score(arg) ⇒ Object

Returns the score of this Parameter matching an argument type.

The score is determined by the relative distance of the Parameter to the argument type. A lower distance means a tighter match of this Parameter.

If arg is nil, this Parameter is being matched as a restarg or a parameter default.

Parameters with restargs or unspecfied default arguments score lower, see RESTARG_SCORE, DEFAULT_SCORE.

# File 'lib/multimethod/parameter.rb', line 189

def score(arg)
  if @restarg
    score = RESTARG_SCORE
  elsif @default && ! arg
    score = DEFAULT_SCORE
  else
    score = all_types(arg).index(type_object) 
  end

  # $stderr.puts "  score(#{signature.to_s}, #{to_s}, #{arg && arg.name}) => #{score}"

  score
end