comments.b

有用

"/*" {   /* old C style comment */
   yypos += 2;
   for(;;) {
      int ch = input(); yypos++;
      if (ch == '*') {
	 do {
	    ch = input(); yypos++;
	 } while (ch == '*');
	 if (ch == '/') break;
      }
      if (ch == '\n') {
	 yyPosToNextLine();
      }
      else if (ch <= 0) {
	 yyerror("EOF inside comment");
	 break;
      }
   }
}
"//" {   /* C++ style comment */
   yypos += 2;
   for(;;) {
      int ch = input(); yypos++;
      if (ch == '\n') {
	 yyPosToNextLine();
	 break;
      }
      else if (ch <= 0) {
	 yyerror("EOF inside comment");
	 break;
      }
   }
}