class SyntaxTree::WhileNode

def ===(other)
  other.is_a?(WhileNode) && predicate === other.predicate &&
    statements === other.statements
end

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

def child_nodes
  [predicate, statements]
end

def copy(predicate: nil, statements: nil, location: nil)
  node =
    WhileNode.new(
      predicate: predicate || self.predicate,
      statements: statements || self.statements,
      location: location || self.location
    )
  node.comments.concat(comments.map(&:copy))
  node
end

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

def format(q)
  LoopFormatter.new("while", self).format(q)
end

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

def modifier?
  predicate.location.start_char > statements.location.start_char
end