module RuboCop::Cop::PercentLiteral

def begin_source(node) 

def begin_source(node)
  node.loc.begin.source if node.loc.respond_to?(:begin) && node.loc.begin
end

def contents_range(node)

%i{1 2 3} this will be the range covering '1 2 3' only)
A range containing only the contents of the percent literal (e.g. in 
def contents_range(node)
  range_between(node.loc.begin.end_pos, node.loc.end.begin_pos)
end

def percent_literal?(node) 

def percent_literal?(node)
  return unless (begin_source = begin_source(node))
  begin_source.start_with?('%')
end

def process(node, *types) 

def process(node, *types)
  return unless percent_literal?(node) && types.include?(type(node))
  on_percent_literal(node)
end

def type(node) 

def type(node)
  node.loc.begin.source[0..-2]
end