Method: SyntaxTree::Params#arity

Defined in:
lib/syntax_tree/node.rb

#arity ⇒ Object

Returns a range representing the possible number of arguments accepted by this params node not including the block. For example:

def foo(a, b = 1, c:, d: 2, &block)
  ...
end

has arity 2..4.



8466
8467
8468
8469
8470
8471
8472
8473
8474
8475
8476
8477
8478
 
# File 'lib/syntax_tree/node.rb', line 8466

def arity
  optional_keywords = keywords.count { |_label, value| value }

  lower_bound =
    requireds.length + posts.length + keywords.length - optional_keywords

  upper_bound =
    if keyword_rest.nil? && rest.nil?
      lower_bound + optionals.length + optional_keywords
    end

  lower_bound..upper_bound
end