ack/lang/m2/comp/scope.h
1986-03-27 17:37:41 +00:00

23 lines
660 B
C

/* S C O P E M E C H A N I S M */
/* $Header$ */
#define OPENSCOPE 0 /* Indicating an open scope */
#define CLOSEDSCOPE 1 /* Indicating a closed scope (module) */
struct scope {
struct scope *next;
struct forwards *sc_forw;
int sc_scope; /* The scope number. Scope number 0 indicates
both the pervasive scope and the end of a
visibility range
*/
};
extern struct scope
*currscope;
#define nextvisible(x) ((x)->sc_scope ? (x)->next : (struct scope *) 0)
#define scopeclosed(x) ((x)->next->sc_scope == 0)
#define enclosing(x) ((x)->next->scope != 0 ? (struct scope *) 0 : (x)->next->next)
#define CurrentScope (currscope->sc_scope)