METAQUOTE
#define SM_MM_QUOTE(ch) (((ch) & 0377) == METAQUOTE || (((ch) & 0340) == 0200))
op[bufused++] = METAQUOTE;
if ((*ip & 0377) == METAQUOTE && !quoted)
case METAQUOTE:
hiderecurse = (c & 0377) == METAQUOTE;
if ((c & 0377) == METAQUOTE && external && *q != '\0')
!quotenext && c == METAQUOTE) \