commit 1965f161a59d81a408cd2369e7a393fa17e95ede
Author: Jason Merrill <jason@redhat.com>
Date: Mon Jun 25 17:32:32 2012 -0400
PR c++/53498
PR c++/53305
* pt.c (tsubst_pack_expansion): Copy before dummy tsubst.
@@ -9393,7 +9393,9 @@ tsubst_pack_expansion (tree t, tree args, tsubst_flags_t complain,
late-specified return type). Even if it exists, it might
have the wrong value for a recursive call. Just make a
dummy decl, since it's only used for its type. */
- arg_pack = tsubst_decl (parm_pack, args, complain);
+ /* Copy before tsubsting so that we don't recurse into any
+ later PARM_DECLs. */
+ arg_pack = tsubst_decl (copy_node (parm_pack), args, complain);
if (arg_pack && FUNCTION_PARAMETER_PACK_P (arg_pack))
/* Partial instantiation of the parm_pack, we can't build
up an argument pack yet. */
new file mode 100644
@@ -0,0 +1,17 @@
+// PR c++/53498
+// { dg-do compile { target c++11 } }
+
+template<typename... Args>
+struct B
+{
+ template<typename U>
+ static
+ void b(const U& u, const Args&... args,
+ decltype(u.f(args...)) dummy)
+ {
+ }
+};
+
+int main() {
+ B<int> b;
+}
new file mode 100644
@@ -0,0 +1,27 @@
+// PR c++/53305
+// { dg-do compile { target c++11 } }
+
+template<class... Ts> struct tuple { };
+
+struct funct
+{
+ template<class... argTs>
+ int operator()(argTs...);
+};
+
+template<class...> struct test;
+
+template<template <class...> class tp,
+ class... arg1Ts, class... arg2Ts>
+struct test<tp<arg1Ts...>, tp<arg2Ts...>>
+{
+ template<class func, class...arg3Ts>
+ auto test2(func fun, arg1Ts... arg1s, arg3Ts... arg3s)
+ -> decltype(fun(arg1s..., arg3s...));
+};
+
+int main()
+{
+ test<tuple<>, tuple<char,int>> t2;
+ t2.test2(funct(), 'a', 2);
+}