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# frozen_string_literal: true
module RuboCop
module AST
# A node extension for `arg`, `optarg`, `restarg`, `kwarg`, `kwoptarg`,
# `kwrestarg`, `blockarg`, `shadowarg` and `forward_arg` nodes.
# This will be used in place of a plain node when the builder constructs
# the AST, making its methods available to all `arg` nodes within RuboCop.
class ArgNode < Node
# Returns the name of an argument.
#
# @return [Symbol, nil] the name of the argument
def name
node_parts[0]
end
# Returns the default value of the argument, if any.
#
# @return [Node, nil] the default value of the argument
def default_value
return unless default?
node_parts[1]
end
# Checks whether the argument has a default value
#
# @return [Boolean] whether the argument has a default value
def default?
optarg_type? || kwoptarg_type?
end
end
end
end
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