CCON
| NUMBER { $$ = celltonode($1, CCON); }
| STRING { $$ = celltonode($1, CCON); }
return isvalue(p) && ((Cell *) (p->narg[0]))->csub == CCON;
nullnode = celltonode(nullloc, CCON);
valtonode(lookup(L_zeronull, symtab, 0), CCON));
NUMBER { $$ = valtonode($1, CCON); }
| STRING { $$ = valtonode($1, CCON); }