cp-tree.h (struct tree_binding): Replace scope field with a union.

	* cp-tree.h (struct tree_binding): Replace scope field with a union.
	(BINDING_SCOPE): Adjust.
	* decl.c (BINDING_LEVEL): Adjust.

From-SVN: r24894

gcc/cp/ChangeLog

+1999-01-28  Jason Merrill  <jason@yorick.cygnus.com>
+
+	* cp-tree.h (struct tree_binding): Replace scope field with a union.
+	(BINDING_SCOPE): Adjust.
+	* decl.c (BINDING_LEVEL): Adjust.
+
 1999-01-26  Jason Merrill  <jason@yorick.cygnus.com>
 
 	* pt.c (instantiate_class_template): Set up the DECL_INITIAL of

gcc/cp/cp-tree.h

@@ -138,7 +138,7 @@ typedef struct ptrmem_cst
    _TYPE node, or a NAMESPACE_DECL.)  This macro should be used only
    for namespace-level bindings; on the IDENTIFIER_BINDING list
    BINDING_LEVEL is used instead.  */
-#define BINDING_SCOPE(NODE) ((tree) ((struct tree_binding*)NODE)->scope)
+#define BINDING_SCOPE(NODE) (((struct tree_binding*)NODE)->scope.scope)
 
 /* This is the declaration bound to the name. Possible values:
    variable, overloaded function, namespace, template, enumerator.  */
@@ -159,7 +159,10 @@ typedef struct ptrmem_cst
 struct tree_binding
 {
   char common[sizeof (struct tree_common)];
-  void* scope;
+  union {
+    tree scope;
+    struct binding_level *level;
+  } scope;
   tree value;
 };
 

gcc/cp/decl.c

@@ -1039,7 +1039,7 @@ pushlevel_temporary (tag_transparent)
 /* For a binding between a name and an entity at a block scope,
    this is the `struct binding_level' for the block.  */
 #define BINDING_LEVEL(NODE) \
-   ((struct binding_level*) ((struct tree_binding*)NODE)->scope)
+   (((struct tree_binding*)NODE)->scope.level)
 
 /* These are currently unused, but permanent, CPLUS_BINDING nodes.
    They are kept here because they are allocated from the permanent