--- stack/stack.h	2003/08/04 11:22:02	1.22
+++ stack/stack.h	2003/08/08 14:20:49	1.25
@@ -41,6 +41,8 @@
 #include <sysexits.h>
 /* assert */
 #include <assert.h>
+/* waitpid */
+#include <sys/wait.h>
 
 #ifdef __linux__
 /* mtrace, muntrace */
@@ -57,6 +59,11 @@
 
 struct cons_struct;
 struct symbol_struct;
+struct environment_struct;
+
+/* A type for pointers to external functions */
+typedef void (*funcp)(struct environment_struct*); 
+/* funcp is a pointer to a void function (environment *) */
 
 /* A value of some type */
 typedef struct {
@@ -86,6 +93,8 @@
     FILE *p;			/* ...or an I/O stream */
     int i;			/* ...or an integer */
     float f;			/* ...or a floating point number */
+    funcp func;                 /* ...or a function pointer */
+    char *string;               /* ...or a string */
   } content;			/* Stores a pointer or an integer */
 
 } value;
@@ -133,9 +142,6 @@
   int gc_count;			/* Amount currently allocated */
 } environment;
 
-/* A type for pointers to external functions */
-typedef void (*funcp)(environment*); /* funcp is a pointer to a void
-					 function (environment *) */
 
 void init_env(environment*);
 void printerr(const char*);