Attributes deprecated and unavailable are largely the same, except
that the former produces a warning whereas the latter produces an error.
So is_late_template_attribute should treat them the same. Confirmed by
Iain that this divergence is not intentional:
<https://gcc.gnu.org/pipermail/gcc-patches/2022-February/591007.html>.
Bootstrapped/regtested on x86_64-pc-linux-gnu, ok for trunk or defer to GCC 13?
gcc/cp/ChangeLog:
* decl2.cc (is_late_template_attribute): Do not defer attribute
unavailable.
* pt.cc (tsubst_enum): Set TREE_UNAVAILABLE.
gcc/testsuite/ChangeLog:
* g++.dg/ext/attr-unavailable-9.C: Add dg-error.
---
gcc/cp/decl2.cc | 1 +
gcc/cp/pt.cc | 4 +---
gcc/testsuite/g++.dg/ext/attr-unavailable-9.C | 4 ++--
3 files changed, 4 insertions(+), 5 deletions(-)
diff --git a/gcc/cp/decl2.cc b/gcc/cp/decl2.cc
index 22edc2ba7f9..2752426546c 100644
--- a/gcc/cp/decl2.cc
+++ b/gcc/cp/decl2.cc
@@ -1314,6 +1314,7 @@ is_late_template_attribute (tree attr, tree decl)
/* But some attributes specifically apply to templates. */
&& !is_attribute_p ("abi_tag", name)
&& !is_attribute_p ("deprecated", name)
+ && !is_attribute_p ("unavailable", name)
&& !is_attribute_p ("visibility", name))
return true;
else
diff --git a/gcc/cp/pt.cc b/gcc/cp/pt.cc
index 8fb17349ee1..853738410be 100644
--- a/gcc/cp/pt.cc
+++ b/gcc/cp/pt.cc
@@ -26976,9 +26976,7 @@ tsubst_enum (tree tag, tree newtag, tree args)
DECL_SOURCE_LOCATION (TYPE_NAME (newtag))
= DECL_SOURCE_LOCATION (TYPE_NAME (tag));
TREE_DEPRECATED (newtag) = TREE_DEPRECATED (tag);
- /* We don't need to propagate TREE_UNAVAILABLE here, because it is, unlike
- deprecated, applied at instantiation time rather than template
- definition time. */
+ TREE_UNAVAILABLE (newtag) = TREE_UNAVAILABLE (tag);
}
/* DECL is a FUNCTION_DECL that is a template specialization. Return
diff --git a/gcc/testsuite/g++.dg/ext/attr-unavailable-9.C
b/gcc/testsuite/g++.dg/ext/attr-unavailable-9.C
index 44161336e78..6df55d534f8 100644
--- a/gcc/testsuite/g++.dg/ext/attr-unavailable-9.C
+++ b/gcc/testsuite/g++.dg/ext/attr-unavailable-9.C
@@ -3,10 +3,10 @@
/* { dg-options "" } */
template<typename T> struct __attribute__ ((unavailable)) S {};
-S<int> s;
+S<int> s; // { dg-error "unavailable" }
template <template <class> class T> struct A { };
-A<S> a;
+A<S> a; // { dg-error "unavailable" }
template <class T> void f() __attribute__ ((unavailable));
base-commit: 8fede2876a751d53a28442dcca32466daa929daa
--
2.35.1
