module Erubis::Basic::Converter

def add_expr(src, code, indicator)
  case indicator
  when '='
    @escape ? add_expr_escaped(src, code) : add_expr_literal(src, code)
  when '=='
    @escape ? add_expr_literal(src, code) : add_expr_escaped(src, code)
  when '==='
    add_expr_debug(src, code)
  end
end