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# frozen_string_literal: true
module RuboCop
module AST
# Common functionality for nodes that are parameterized:
# `send`, `super`, `zsuper`, `def`, `defs`
module ParameterizedNode
# Checks whether this node's arguments are wrapped in parentheses.
#
# @return [Boolean] whether this node's arguments are
# wrapped in parentheses
def parenthesized?
loc.end && loc.end.is?(')')
end
# A shorthand for getting the first argument of the node.
# Equivalent to `arguments.first`.
#
# @return [Node, nil] the first argument of the node,
# or `nil` if there are no arguments
def first_argument
arguments[0]
end
# A shorthand for getting the last argument of the node.
# Equivalent to `arguments.last`.
#
# @return [Node, nil] the last argument of the node,
# or `nil` if there are no arguments
def last_argument
arguments[-1]
end
# Checks whether this node has any arguments.
#
# @return [Boolean] whether this node has any arguments
def arguments?
!arguments.empty?
end
# Checks whether any argument of the node is a splat
# argument, i.e. `*splat`.
#
# @return [Boolean] whether the node is a splat argument
def splat_argument?
arguments? &&
(arguments.any?(&:splat_type?) || arguments.any?(&:restarg_type?))
end
alias rest_argument? splat_argument?
# Whether the last argument of the node is a block pass,
# i.e. `&block`.
#
# @return [Boolean] whether the last argument of the node is a block pass
def block_argument?
arguments? &&
(last_argument.block_pass_type? || last_argument.blockarg_type?)
end
end
end
end
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