parenlevel
parenlevel = 0;
parenlevel++;
VTRACE(DBG_LEXER, ("'('(%d)", parenlevel));
if (parenlevel > 0) {
--parenlevel;
VTRACE(DBG_LEXER, ("')'(%d)", parenlevel));
VTRACE(DBG_LEXER, ("')'(%d)", parenlevel));
parenlevel += 2;