class REXML::Parsers::XPathParser

def PrimaryExpr path, parsed
  case path
  when VARIABLE_REFERENCE
    varname = $1
    path = $'
    parsed << :variable
    parsed << varname
    #arry << @variables[ varname ]
  when /^(\w[-\w]*)(?:\()/
    fname = $1
    tmp = $'
    return path if fname =~ NT
    path = tmp
    parsed << :function
    parsed << fname
    path = FunctionCall(path, parsed)
  when NUMBER
    varname = $1.nil? ? $2 : $1
    path = $'
    parsed << :literal
    parsed << (varname.include?('.') ? varname.to_f : varname.to_i)
  when LITERAL
    varname = $1.nil? ? $2 : $1
    path = $'
    parsed << :literal
    parsed << varname
  when /^\(/                                               #/
    path, contents = get_group(path)
    contents = contents[1..-2]
    n = []
    OrExpr( contents, n )
    parsed.concat(n)
  end
  path
end