LOOK_AHEAD
if (LOOK_AHEAD(t,lquote)) { /* strip quotes */
if (LOOK_AHEAD(l,rquote)) {
} else if (LOOK_AHEAD(l,lquote)) {
} else if (sp < 0 && LOOK_AHEAD(t, scommt)) {
if (LOOK_AHEAD(t, ecommt)) {
if (LOOK_AHEAD(t, scommt)) {
if (LOOK_AHEAD(t, ecommt)) {