* cp-tree.def (PTRMEM_CST): New tree node.

	* cp-tree.h (ptrmem_cst): New type.
	(lang_type): Remove local_typedecls.
	(dummy): Increase to 12 bits from 11.
	(CLASSTYPE_LOCAL_TYPEDECLS): Remove.
	(PTRMEM_CST_CLASS): New macro.
	(PTRMEM_CST_MEMBER): Likewise.
	(current_access_specifier): New variable.
	(current_class_type): Remove duplicate declaration.
	(finish_struct): Change prototype.
	(unreverse_member_declarations): New function.
	(pushdecl_class_level): Change prototype.
	(grok_enum_decls): Remove.
	(fixup_anonymous_union): New function.
	(grok_x_components): Change prototype.
	(tsubst_chain): Remove.
	(finish_member_template_decl): Likewise.
	(check_explicit_specialization): Fix indentation.
	(finish_class_definition): Change prototype.
	(finish_member_class_template): Likewise.
	(finish_member_declaration): New function.
	(check_multiple_declarators): Likewise.
	* class.c (class_stack_node_t): New type.
	(current_class_base): Remove.
	(current_class_stack): Change type.
	(current_access_specifier): New variable.
	(grow_method): Remove.
	(check_member_decl_is_same_in_complete_scope): Break out from
	finish_struct.
	(make_method_vec): New function.
	(free_method_vec): Likewise.
	(add_implicitly_declared_members): Break out from finish_struct_1.
	(free_method_vecs): New variable.
	(add_method): Rework for direct use from parser.
	(handle_using_decl): Watch for NULL_TREE while iterating through
	CLASSTYPE_METHOD_VEC.
	(finish_struct_methods): Don't build CLASSTYPE_METHOD_VEC here;
	just do some error-checking.
	(warn_hidden): Change iteration through CLASSTYPE_METHOD_VEC.
	(finish_struct_1): Simplify.  Use add_implicitly_declared_members.
	(finish_struct): Change prototype.  Simplify; fields and methods
	are already set up at this point.
	(init_class_processing): Set up current_class_stack.
	(pushclass): Save current_access_specifier.
	(popclass): Restore it.
	(currently_open_class): Simplify.
	(build_self_reference): Remove use of CLASSTYPE_LOCAL_TYPEDECLS.
	* decl.c (saved_scope): Add access_specifier.
	(maybe_push_to_top_level): Save it.
	(pop_from_top_level): Restore it.
	(maybe_process_template_type_declaration): Use
	finish_member_declaration.
	(pushtag): Likewise.
	(pushdecl_class_level): Don't return a value.
	(fixup_anonymous_union): Break out from grok_x_components.
	(shadow_tag): Use it.
	(xref_tag): Complain about using an elaborated type specifier to
	reference a template type parameter or typedef name.
	(xref_basetypes): Don't set CLASSTYPE_LOCAL_TYPEDECLS.
	(current_local_enum): Remove.
	(build_enumerator): Call finish_member_declaration.
	(grok_enum_decls): Remove.
	* decl2.c (grok_x_components): Simplify.
	(check_classfn): Change iteration through CLASSTYPE_METHOD_VEC.
	(grokfield): Don't set CLASSTYPE_LOCAL_TYPEDECLS.
	(merge_functions): Add to comment.
	(arg_assoc_type): Prototype.
	(arg_assoc): Pass as many arguments as there are parameters.
	* error.c (dump_expr): Handle PTRMEM_CST.  Improve handling of
	OFFSET_REF.
	* expr.c (cpls_expand_expr): Remove dead code.  Handle
	PTRMEM_CST.
	* friend.c (do_friend): Lookup friends when in nested classes.
	Change comments.
	* init.c (build_offset_ref): Do lookup even for classes that are
	only partially defined.
	(decl_constant_value): Remove dead code.
	* method.c (build_overload_value): Remove hack where by TYPE was
	not a TYPE.  Handle PTRMEM_CST.
	(build_template_parm_names): Don't pass a PARM_DECL where a TYPE
	should go.
	* parse.y (components, notype_components, component_decl,
	component_decl_1, component_declarator, component_declarator0):
	Now all are itype rather than ttype.  Rework to add members to
	classes on the fly.
	(typesqpecqual_reserved): Use check_multiple_declarators.
	(structsp): Update class to finish_class_definition.
	(do_xref_defn): Unsplit into named_class_head.
	(access_specifier): Set current_access_specifier.
	* pt.c (set_current_access_from_decl): New function.
	(finish_member_template_decl): Don't take the parameters.
	(comp_template_args): Make more robust.
	(lookup_template_class): Don't use current_local_enum.
	(for_each_template_parm): Handle PTRMEM_CST.
	(instantiate_class_template): Use set_current_access_from_decl,
	finish_member_declaration and unreverse_member_declarations.  Set
	lineno/input_filename before generating implicit member functions.
	(type_unification_real): Don't assume back-unification happens
	only for the last argument.
	(regenerate_decl_from_template): Call pushclass a bit earlier.
	(tsubst_chain): Remove.
	(tsubst_enum): Use set_current_access_from_decl.
	(set_mangled_name_for_template_decl): Fix indentation.
	* search.c (lookup_fnfields_1): Change iteration through
	CLASSTYPE_METHOD_VEC.
	(dfs_pushdecls): Likewise.
	(dfs_compress_decls): Likewise.
	(add_conversions): Likewise.
	* semantics.c (finish_class_definition): Don't take components.
	Change call to finish_struct.
	(finish_member_declaration): New function.
	(finish_member_class_template): Don't take template parameters.
	Change call to grok_x_components.  Call finish_member_template_decl.
	(check_multiple_declarators): New function.
	* sig.c (append_signature_fields): Work from the TYPE_METHODS, not
	a passed in fieldlist.
	* tree.c (search_tree): Handle PTRMEM_CST.
	(mapcar): Likewise.
	* typeck.c (unary_complex_lvalue): Build PTRMEM_CSTs, not
	INTEGER_CSTs, for pointer-to-data members.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@22869 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 33 insertions, 9 deletions

diff --git a/gcc/cp/expr.c b/gcc/cp/expr.c
index ae8a374f86a..056f4d1f16a 100644
--- a/gcc/cp/expr.c
+++ b/gcc/cp/expr.c
@@ -162,19 +162,43 @@ cplus_expand_expr (exp, target, tmode, modifier)
 	return DECL_RTL (slot);
       }
 
+    case PTRMEM_CST:
+      {
+	tree member;
+	tree offset;
+	
+	/* Find the member.  */
+	member = PTRMEM_CST_MEMBER (exp);
+
+	if (TREE_CODE (member) == FIELD_DECL) 
+	  {
+	    /* Find the offset for the field.  */
+	    offset = convert (sizetype,
+			      size_binop (EASY_DIV_EXPR,
+					  DECL_FIELD_BITPOS (member),
+					  size_int (BITS_PER_UNIT)));
+
+	    /* We offset all pointer to data members by 1 so that we
+	       can distinguish between a null pointer to data member
+	       and the first data member of a structure.  */
+	    offset = size_binop (PLUS_EXPR, offset, size_int (1));
+	
+	    return expand_expr (cp_convert (type, offset), target, tmode,
+				modifier);
+	  }
+	else
+	  {
+	    /* We don't yet handle pointer-to-member functions this
+	       way.  */
+	    my_friendly_abort (0);
+	    return 0;
+	  }
+      }
+
     case OFFSET_REF:
       {
-#if 1
 	return expand_expr (default_conversion (resolve_offset_ref (exp)),
 			    target, tmode, EXPAND_NORMAL);
-#else
-	/* This is old crusty code, and does not handle all that the
-	   resolve_offset_ref function does.  (mrs) */
-	tree base = build_unary_op (ADDR_EXPR, TREE_OPERAND (exp, 0), 0);
-	tree offset = build_unary_op (ADDR_EXPR, TREE_OPERAND (exp, 1), 0);
-	return expand_expr (build (PLUS_EXPR, TREE_TYPE (exp), base, offset),
-			    target, tmode, EXPAND_NORMAL);
-#endif
       }
 
     case THUNK_DECL: