ammar?"</i>, but it
      does not remember any data, nor does it perform any side effects.
      Remember: we want to put the parsed numbers into a vector. This is done
      in an <b>action</b> that is linked to a particular parser. For example,
      whenever we parse a real number, we wish to store the parsed number after
      a successful match. We now wish to extract information from the parser.
      Semantic actions do this. Semantic actions may be attached to any point
      in the grammar specifi