--- ray/src/common/calcomp.h	1989/05/18 08:33:47	1.3
+++ ray/src/common/calcomp.h	1991/11/12 16:55:05	2.1
@@ -15,11 +15,12 @@
 #define  ARG		6
 #define  TICK		7
 #define  SYM		8
-				/* also: '+', '-', '*', '/', '^', '=' */
+				/* also: '+', '-', '*', '/', '^', '=', ':' */
 
 typedef struct {
     char  *fname;		/* function name */
-    int  nargs;			/* # of required arguments */
+    short  nargs;		/* # of required arguments */
+    short  atyp;		/* assignment type (':' or '=') */
     double  (*f)();		/* pointer to function */
 }  LIBR;		/* a library function */
 
@@ -44,11 +45,17 @@ typedef struct epnode {
 
 typedef struct vardef  VARDEF;	/* a variable definition */
 
+#define  MAXWORD	63		/* maximum word/id length */
+#define  CNTXMARK	'`'		/* context mark */
+
+#define  isid(c)	(isalnum(c) || (c) == '_' || \
+			(c) == '.' || (c) == CNTXMARK)
+
 extern double  eval(), varvalue(), chanvalue(), funvalue();
 extern double  argument(), getnum();
 extern double  (*eoper[])();
 extern int  getinum();
-extern char  *getname(), *argfun();
+extern char  *getname(), *qualname(), *setcontext(), *argfun();
 extern EPNODE  *eparse(), *ekid(), *dlookup(), *dpop(), *dfirst(), *dnext();
 extern EPNODE  *getdefn(), *getchan();
 extern EPNODE  *getE1(), *getE2(), *getE3(), *getE4(), *getE5(), *rconst();