/* Help friends in C++.
- Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
- Free Software Foundation, Inc.
+ Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
+ 2007, 2008 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
+the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
tree friends = FRIEND_DECLS (list);
for (; friends ; friends = TREE_CHAIN (friends))
{
- tree friend = TREE_VALUE (friends);
+ tree this_friend = TREE_VALUE (friends);
- if (friend == NULL_TREE)
+ if (this_friend == NULL_TREE)
continue;
- if (supplicant == friend)
+ if (supplicant == this_friend)
return 1;
- if (is_specialization_of_friend (supplicant, friend))
+ if (is_specialization_of_friend (supplicant, this_friend))
return 1;
}
break;
else
/* It's a type. */
{
- /* Nested classes are implicitly friends of their enclosing types, as
- per core issue 45 (this is a change from the standard). */
- for (context = supplicant;
- context && TYPE_P (context);
- context = TYPE_CONTEXT (context))
- if (type == context)
- return 1;
+ if (same_type_p (supplicant, type))
+ return 1;
list = CLASSTYPE_FRIEND_CLASSES (TREE_TYPE (TYPE_MAIN_DECL (type)));
for (; list ; list = TREE_CHAIN (list))
}
}
- if (declp && DECL_FUNCTION_MEMBER_P (supplicant))
- context = DECL_CONTEXT (supplicant);
- else if (! declp)
- /* Local classes have the same access as the enclosing function. */
- context = decl_function_context (TYPE_MAIN_DECL (supplicant));
+ if (declp)
+ {
+ if (DECL_FUNCTION_MEMBER_P (supplicant))
+ context = DECL_CONTEXT (supplicant);
+ else
+ context = NULL_TREE;
+ }
else
- context = NULL_TREE;
+ {
+ if (TYPE_CLASS_SCOPE_P (supplicant))
+ /* Nested classes get the same access as their enclosing types, as
+ per DR 45 (this is a change from the standard). */
+ context = TYPE_CONTEXT (supplicant);
+ else
+ /* Local classes have the same access as the enclosing function. */
+ context = decl_function_context (TYPE_MAIN_DECL (supplicant));
+ }
/* A namespace is not friend to anybody. */
if (context && TREE_CODE (context) == NAMESPACE_DECL)
ctx = DECL_CONTEXT (decl);
if (ctx && CLASS_TYPE_P (ctx) && !uses_template_parms (ctx))
- perform_or_defer_access_check (TYPE_BINFO (ctx), decl);
+ perform_or_defer_access_check (TYPE_BINFO (ctx), decl, decl);
maybe_add_class_template_decl_list (type, decl, /*friend_p=*/1);
int class_template_depth = template_class_depth (type);
int friend_depth = processing_template_decl - class_template_depth;
- if (! IS_AGGR_TYPE (friend_type))
+ if (! MAYBE_CLASS_TYPE_P (friend_type))
{
error ("invalid type %qT declared %<friend%>", friend_type);
return;
else if (same_type_p (type, friend_type))
{
if (complain)
- pedwarn ("class %qT is implicitly friends with itself",
+ warning (0, "class %qT is implicitly friends with itself",
type);
return;
}
{
error ("%qT is not a member class template of %qT",
name, ctype);
- cp_error_at ("%qD declared here", decl);
+ error ("%q+D declared here", decl);
return;
}
if (!template_member_p && (TREE_CODE (decl) != TYPE_DECL
{
error ("%qT is not a nested class of %qT",
name, ctype);
- cp_error_at ("%qD declared here", decl);
+ error ("%q+D declared here", decl);
return;
}
}
}
-/* Main friend processor.
-
- CTYPE is the class this friend belongs to.
-
- DECLARATOR is the name of the friend.
-
- DECL is the FUNCTION_DECL that the friend is.
-
- FLAGS is just used for `grokclassfn'.
-
- QUALS say what special qualifies should apply to the object
- pointed to by `this'. */
+/* Record DECL (a FUNCTION_DECL) as a friend of the
+ CURRENT_CLASS_TYPE. If DECL is a member function, CTYPE is the
+ class of which it is a member, as named in the friend declaration.
+ DECLARATOR is the name of the friend. FUNCDEF_FLAG is true if the
+ friend declaration is a definition of the function. FLAGS is as
+ for grokclass fn. */
tree
do_friend (tree ctype, tree declarator, tree decl,
tree attrlist, enum overload_flags flags,
- cp_cv_quals quals,
- int funcdef_flag)
+ bool funcdef_flag)
{
+ gcc_assert (TREE_CODE (decl) == FUNCTION_DECL);
+ gcc_assert (!ctype || MAYBE_CLASS_TYPE_P (ctype));
+
/* Every decl that gets here is a friend of something. */
DECL_FRIEND_P (decl) = 1;
+ /* Unfortunately, we have to handle attributes here. Normally we would
+ handle them in start_decl_1, but since this is a friend decl start_decl_1
+ never gets to see it. */
+
+ /* Set attributes here so if duplicate decl, will have proper attributes. */
+ cplus_decl_attributes (&decl, attrlist, 0);
+
if (TREE_CODE (declarator) == TEMPLATE_ID_EXPR)
{
declarator = TREE_OPERAND (declarator, 0);
declarator = DECL_NAME (get_first_fn (declarator));
}
- gcc_assert (TREE_CODE (decl) == FUNCTION_DECL);
-
if (ctype)
{
/* CLASS_TEMPLATE_DEPTH counts the number of template headers for
if (flags == NO_SPECIAL && declarator == cname)
DECL_CONSTRUCTOR_P (decl) = 1;
- /* This will set up DECL_ARGUMENTS for us. */
- grokclassfn (ctype, decl, flags, quals);
+ grokclassfn (ctype, decl, flags);
if (friend_depth)
{
the process of being defined. */
if (class_template_depth
|| COMPLETE_TYPE_P (ctype)
- || TYPE_BEING_DEFINED (ctype))
+ || (CLASS_TYPE_P (ctype) && TYPE_BEING_DEFINED (ctype)))
{
if (DECL_TEMPLATE_INFO (decl))
/* DECL is a template specialization. No need to
else if (class_template_depth)
/* We rely on tsubst_friend_function to check the
validity of the declaration later. */
- decl = push_template_decl_real (decl, /*is_friend=*/1);
+ decl = push_template_decl_real (decl, /*is_friend=*/true);
else
decl = check_classfn (ctype, decl,
template_member_p
general, such a declaration depends on template
parameters. Instead, we call pushdecl when the class
is instantiated. */
- decl = push_template_decl_real (decl, /*is_friend=*/1);
+ decl = push_template_decl_real (decl, /*is_friend=*/true);
else if (current_function_decl)
- /* This must be a local class, so pushdecl will be ok, and
- insert an unqualified friend into the local scope
- (rather than the containing namespace scope, which the
- next choice will do). */
- decl = pushdecl (decl);
+ {
+ /* This must be a local class. 11.5p11:
+
+ If a friend declaration appears in a local class (9.8) and
+ the name specified is an unqualified name, a prior
+ declaration is looked up without considering scopes that
+ are outside the innermost enclosing non-class scope. For a
+ friend function declaration, if there is no prior
+ declaration, the program is ill-formed. */
+ tree t = lookup_name_innermost_nonclass_level (DECL_NAME (decl));
+ if (t)
+ decl = pushdecl_maybe_friend (decl, /*is_friend=*/true);
+ else
+ {
+ error ("friend declaration %qD in local class without "
+ "prior declaration", decl);
+ return error_mark_node;
+ }
+ }
else
{
/* We can't use pushdecl, as we might be in a template
- class specialization, and pushdecl will insert an
- unqualified friend decl into the template parameter
- scope, rather than the namespace containing it. */
+ class specialization, and pushdecl will insert an
+ unqualified friend decl into the template parameter
+ scope, rather than the namespace containing it. */
tree ns = decl_namespace_context (decl);
push_nested_namespace (ns);
- decl = pushdecl_namespace_level (decl);
+ decl = pushdecl_namespace_level (decl, /*is_friend=*/true);
pop_nested_namespace (ns);
}
if (warn)
{
static int explained;
- warning (0, "friend declaration %q#D declares a non-template "
- "function", decl);
- if (! explained)
+ bool warned;
+
+ warned = warning (OPT_Wnon_template_friend, "friend declaration "
+ "%q#D declares a non-template function", decl);
+ if (! explained && warned)
{
- warning (0, "(if this is not what you intended, make sure "
- "the function template has already been declared "
- "and add <> after the function name here) "
- "-Wno-non-template-friend disables this warning");
+ inform (input_location, "(if this is not what you intended, make sure "
+ "the function template has already been declared "
+ "and add <> after the function name here) ");
explained = 1;
}
}
DECL_FRIEND_P (decl) = 1;
}
- /* Unfortunately, we have to handle attributes here. Normally we would
- handle them in start_decl_1, but since this is a friend decl start_decl_1
- never gets to see it. */
-
- /* Set attributes here so if duplicate decl, will have proper attributes. */
- cplus_decl_attributes (&decl, attrlist, 0);
-
return decl;
}
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