* cp-tree.h (lang_type): Remove has_assignment and has_real_assignment. Add befriending_classes. (TYPE_HAS_ASSIGNMENT): Remove. (TYPE_HAS_REAL_ASSIGNMENT): Likewise. (CLASSTYPE_BEFRIENDING_CLASSES): New macro. (lang_decl): Document. (DECL_BEFRIENDING_CLASSES): New macro. (FRIEND_NAME): Move declaration to more obvious location. (FRIEND_DECLS): Likewise. * class.c (finish_struct_1): Don't use TYPE_HAS_REAL_ASSIGNMENT. * decl.c (duplicate_decls): Copy DECL_BEFRIENDING_CLASSES. (fixup_anonymous_union): Don't use TYPE_HAS_ASSIGNMENT. (grok_op_properties): Likewise. * friend.c (is_friend): Use FRIEND_NAME and FRIEND_DECLS. (add_friend): Likewise. Don't do weird things with assignment operators. Update DECL_BEFRIENDING_CLASSES. (add_friends): Don't do weird things with assignment operators. (make_friend_class): Likewise. Update CLASSTYPE_BEFRIENDING_CLASSES. * pt.c (instantiate_class_template): Don't set TYPE_HAS_ASSIGNMENT. (tsubst_copy): Substitute the TREE_TYPE for more unary expressions. * ptree.c (print_lang_type): Don't look at TYPE_HAS_ASSIGNMENT. * search.c (protected_accessible_p): New function. (friend_accessible_p): Likewise. (accessible_p): Use them. From-SVN: r25940
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