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Showing content from https://ruby-syntax-tree.github.io/syntax_tree/SyntaxTree/ArgParen.html below:

class SyntaxTree::ArgParen - RDoc Documentation

1. SyntaxTree::
2. ArgParen

ArgParen represents wrapping arguments to a method inside a set of parentheses.

method(argument)

In the example above, there would be an ArgParen node around the Args node that represents the set of arguments being sent to the method method. The argument child node can be nil if no arguments were passed, as in:

method()

def initialize(arguments:, location:)
  @arguments = arguments
  @location = location
  @comments = []
end

def ===(other)
  other.is_a?(ArgParen) && arguments === other.arguments
end

def accept(visitor)
  visitor.visit_arg_paren(self)
end

def arity
  arguments&.arity || 0
end

def child_nodes
  [arguments]
end

def copy(arguments: nil, location: nil)
  node =
    ArgParen.new(
      arguments: arguments || self.arguments,
      location: location || self.location
    )

  node.comments.concat(comments.map(&:copy))
  node
end

def deconstruct_keys(_keys)
  { arguments: arguments, location: location, comments: comments }
end

def format(q)
  unless arguments
    q.text("()")
    return
  end

  q.text("(")
  q.group do
    q.indent do
      q.breakable_empty
      q.format(arguments)
      q.if_break { q.text(",") } if q.trailing_comma? && trailing_comma?
    end
    q.breakable_empty
  end
  q.text(")")
end

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