class SyntaxTree::IfNode

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

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

def child_nodes
  [predicate, statements, consequent]
end

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

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

def format(q)
  ConditionalFormatter.new("if", self).format(q)
end

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

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