code: void insertMacros(TokenList tokens ) {
          TokenList.Token t = tokens.getFirst();
          while( t != null ) {
              if( t.getType() == Type.WORD ) {
                  Macro v = lookupMacro(t.word);
                  if (v != null) {
                      TokenList.Token before = t.previous;
                      List<TokenList.Token> inputs = new ArrayList<TokenList.Token>();
                      t = parseMacroInput(inputs,t.next);
  
                      TokenList sniplet = v.execute(inputs);
                      tokens.extractSubList(before.next,t);
                      tokens.insertAfter(before,sniplet);
                      t = sniplet.last;
                  }
              }
              t = t.next;
          }
      }
docs: Checks to see if a WORD matches the name of a macro.  if it does it applies the macro at that location