diff options
Diffstat (limited to 'gcc/cp')
| -rw-r--r-- | gcc/cp/ChangeLog | 9 | ||||
| -rw-r--r-- | gcc/cp/name-lookup.c | 27 |
2 files changed, 35 insertions, 1 deletions
diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog index f17c735d..8b883e7 100644 --- a/gcc/cp/ChangeLog +++ b/gcc/cp/ChangeLog @@ -1,3 +1,12 @@ +2010-06-02 Jason Merrill <jason@redhat.com> + + PR c++/9726 + PR c++/23594 + PR c++/44333 + * name-lookup.c (same_entity_p): New. + (ambiguous_decl): Multiple declarations of the same entity + are not ambiguous. + 2010-06-01 Jason Merrill <jason@redhat.com> DR 990 diff --git a/gcc/cp/name-lookup.c b/gcc/cp/name-lookup.c index 051d3c5..936c256 100644 --- a/gcc/cp/name-lookup.c +++ b/gcc/cp/name-lookup.c @@ -3698,6 +3698,31 @@ merge_functions (tree s1, tree s2) return s1; } +/* Returns TRUE iff OLD and NEW are the same entity. + + 3 [basic]/3: An entity is a value, object, reference, function, + enumerator, type, class member, template, template specialization, + namespace, parameter pack, or this. + + 7.3.4 [namespace.udir]/4: If name lookup finds a declaration for a name + in two different namespaces, and the declarations do not declare the + same entity and do not declare functions, the use of the name is + ill-formed. */ + +static bool +same_entity_p (tree one, tree two) +{ + if (one == two) + return true; + if (!one || !two) + return false; + if (TREE_CODE (one) == TYPE_DECL + && TREE_CODE (two) == TYPE_DECL + && same_type_p (TREE_TYPE (one), TREE_TYPE (two))) + return true; + return false; +} + /* This should return an error not all definitions define functions. It is not an error if we find two functions with exactly the same signature, only if these are selected in overload resolution. @@ -3763,7 +3788,7 @@ ambiguous_decl (struct scope_binding *old, cxx_binding *new_binding, int flags) if (!old->value) old->value = val; - else if (val && val != old->value) + else if (val && !same_entity_p (val, old->value)) { if (is_overloaded_fn (old->value) && is_overloaded_fn (val)) old->value = merge_functions (old->value, val); |