/* Breadth-first and depth-first routines for
searching multiple-inheritance lattice for GNU C++.
Copyright (C) 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2002, 2003, 2004 Free Software Foundation, Inc.
+ 1999, 2000, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
Contributed by Michael Tiemann (tiemann@cygnus.com)
This file is part of GCC.
#include "rtl.h"
#include "output.h"
#include "toplev.h"
-#include "stack.h"
static int is_subobject_of_p (tree, tree);
static tree dfs_lookup_base (tree, void *);
struct lookup_base_data_s
{
- tree t; /* type being searched. */
+ tree t; /* type being searched. */
tree base; /* The base type we're looking for. */
tree binfo; /* Found binfo. */
bool via_virtual; /* Found via a virtual path. */
the compiler cannot handle that. Once the class is
defined, USING_DECLs are purged from TYPE_FIELDS; see
handle_using_decl. However, we make special efforts to
- make using-declarations in template classes work
- correctly. */
- if (CLASSTYPE_TEMPLATE_INFO (type)
- && !CLASSTYPE_USE_TEMPLATE (type)
- && !TREE_TYPE (field))
- ;
- else
+ make using-declarations in class templates and class
+ template partial specializations work correctly noticing
+ that dependent USING_DECL's do not have TREE_TYPE set. */
+ if (TREE_TYPE (field))
continue;
}
return NULL_TREE;
}
-/* There are a number of cases we need to be aware of here:
+/* Return the FUNCTION_DECL, RECORD_TYPE, UNION_TYPE, or
+ NAMESPACE_DECL corresponding to the innermost non-block scope. */
+
+tree
+current_scope (void)
+{
+ /* There are a number of cases we need to be aware of here:
current_class_type current_function_decl
global NULL NULL
fn-local NULL SET
class->fn SET SET
fn->class SET SET
- Those last two make life interesting. If we're in a function which is
- itself inside a class, we need decls to go into the fn's decls (our
- second case below). But if we're in a class and the class itself is
- inside a function, we need decls to go into the decls for the class. To
- achieve this last goal, we must see if, when both current_class_ptr and
- current_function_decl are set, the class was declared inside that
- function. If so, we know to put the decls into the class's scope. */
-
-tree
-current_scope (void)
-{
- if (current_function_decl == NULL_TREE)
- return current_class_type;
- if (current_class_type == NULL_TREE)
+ Those last two make life interesting. If we're in a function which is
+ itself inside a class, we need decls to go into the fn's decls (our
+ second case below). But if we're in a class and the class itself is
+ inside a function, we need decls to go into the decls for the class. To
+ achieve this last goal, we must see if, when both current_class_ptr and
+ current_function_decl are set, the class was declared inside that
+ function. If so, we know to put the decls into the class's scope. */
+ if (current_function_decl && current_class_type
+ && ((DECL_FUNCTION_MEMBER_P (current_function_decl)
+ && same_type_p (DECL_CONTEXT (current_function_decl),
+ current_class_type))
+ || (DECL_FRIEND_CONTEXT (current_function_decl)
+ && same_type_p (DECL_FRIEND_CONTEXT (current_function_decl),
+ current_class_type))))
return current_function_decl;
- if ((DECL_FUNCTION_MEMBER_P (current_function_decl)
- && same_type_p (DECL_CONTEXT (current_function_decl),
- current_class_type))
- || (DECL_FRIEND_CONTEXT (current_function_decl)
- && same_type_p (DECL_FRIEND_CONTEXT (current_function_decl),
- current_class_type)))
+ if (current_class_type)
+ return current_class_type;
+ if (current_function_decl)
return current_function_decl;
-
- return current_class_type;
+ return current_namespace;
}
/* Returns nonzero if we are currently in a function scope. Note
bool
at_namespace_scope_p (void)
{
- /* We are in a namespace scope if we are not it a class scope or a
- function scope. */
- return !current_scope();
+ tree cs = current_scope ();
+ return cs && TREE_CODE (cs) == NAMESPACE_DECL;
}
/* Return the scope of DECL, as appropriate when doing name-lookup. */
static tree
dfs_accessible_post (tree binfo, void *data ATTRIBUTE_UNUSED)
{
- if (BINFO_ACCESS (binfo) != ak_none
- && is_friend (BINFO_TYPE (binfo), current_scope ()))
- return binfo;
+ if (BINFO_ACCESS (binfo) != ak_none)
+ {
+ tree scope = current_scope ();
+ if (scope && TREE_CODE (scope) != NAMESPACE_DECL
+ && is_friend (BINFO_TYPE (binfo), scope))
+ return binfo;
+ }
return NULL_TREE;
}
then we can tell in what context the access is occurring by looking
at the most derived class along the path indicated by BINFO. If
CONSIDER_LOCAL is true, do consider special access the current
- scope or friendship thereof we might have. */
+ scope or friendship thereof we might have. */
int
accessible_p (tree type, tree decl, bool consider_local_p)
/* Add the new value. */
lfi->ambiguous = tree_cons (NULL_TREE, nval, lfi->ambiguous);
TREE_TYPE (lfi->ambiguous) = error_mark_node;
- lfi->errstr = "request for member `%D' is ambiguous";
+ lfi->errstr = "request for member %qD is ambiguous";
}
}
else
/* If the base is inherited via private or protected
inheritance, then we can't see it, unless we are a friend of
the current binfo. */
- if (BINFO_BASE_ACCESS (binfo, ix) != access_public_node
- && !(friends_p && is_friend (BINFO_TYPE (binfo), current_scope ())))
- continue;
+ if (BINFO_BASE_ACCESS (binfo, ix) != access_public_node)
+ {
+ tree scope;
+ if (!friends_p)
+ continue;
+ scope = current_scope ();
+ if (!scope
+ || TREE_CODE (scope) == NAMESPACE_DECL
+ || !is_friend (BINFO_TYPE (binfo), scope))
+ continue;
+ }
if (mark)
BINFO_MARKED (base_binfo) = 1;
/* Check that virtual overrider OVERRIDER is acceptable for base function
BASEFN. Issue diagnostic, and return zero, if unacceptable. */
-int
+static int
check_final_overrider (tree overrider, tree basefn)
{
tree over_type = TREE_TYPE (overrider);
over_return = non_reference (TREE_TYPE (over_type));
if (CLASS_TYPE_P (over_return))
fail = 2;
+ else
+ {
+ cp_warning_at ("deprecated covariant return type for %q#D",
+ overrider);
+ cp_warning_at (" overriding %q#D", basefn);
+ }
}
else
fail = 2;
tree *prev, other;
if (!(virtual_depth || TREE_STATIC (level)))
- /* Neither is morally virtual, so cannot hide each other. */
+ /* Neither is morally virtual, so cannot hide each other. */
continue;
if (!TREE_VALUE (level))
if (same_type_p (to_type, TREE_TYPE (other)))
{
if (they_hide_us)
- /* We are hidden. */
+ /* We are hidden. */
return 0;
if (we_hide_them)
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