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C++ PATCH for c++/54859 (bogus errors with alias templates)
- From: Jason Merrill <jason at redhat dot com>
- To: gcc-patches List <gcc-patches at gcc dot gnu dot org>
- Date: Fri, 09 Nov 2012 16:17:20 -0500
- Subject: C++ PATCH for c++/54859 (bogus errors with alias templates)
My patch for 54575 started using instantiate_template for alias
templates, but instantiate_template wasn't prepared to instantiate with
dependent template arguments. Fixed thus.
Tested x86_64-pc-linux-gnu, applied to trunk.
commit 11ab97f0fe9a7262362f4ef997562f32028e18e4
Author: Jason Merrill <jason@redhat.com>
Date: Thu Nov 8 16:17:41 2012 -0500
PR c++/54859
* pt.c (check_instantiated_arg): Don't complain about dependent args.
diff --git a/gcc/cp/pt.c b/gcc/cp/pt.c
index 1ff1c73..50d12b0 100644
--- a/gcc/cp/pt.c
+++ b/gcc/cp/pt.c
@@ -14362,6 +14362,8 @@ tsubst_copy_and_build (tree t,
static bool
check_instantiated_arg (tree tmpl, tree t, tsubst_flags_t complain)
{
+ if (dependent_template_arg_p (t))
+ return false;
if (ARGUMENT_PACK_P (t))
{
tree vec = ARGUMENT_PACK_ARGS (t);
diff --git a/gcc/testsuite/g++.dg/cpp0x/alias-decl-25.C b/gcc/testsuite/g++.dg/cpp0x/alias-decl-25.C
new file mode 100644
index 0000000..e72bd35
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/alias-decl-25.C
@@ -0,0 +1,10 @@
+// PR c++/54859
+// { dg-options -std=c++11 }
+
+template<unsigned N>
+ using Num = int;
+
+template<typename... Types>
+ using Count = Num<sizeof...(Types)>;
+
+Count<int, char, void> i;