re PR c++/48292 ([C++0x] "sorry, unimplemented: use of 'type_pack_expansion' in template")
PR c++/48292 * pt.c (tsubst_decl) [PARM_DECL]: Handle partial instantiation of function parameter pack. (tsubst_pack_expansion): Likewise. From-SVN: r174201
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2011-05-25 Jason Merrill <jason@redhat.com>
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PR c++/48292
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* pt.c (tsubst_decl) [PARM_DECL]: Handle partial instantiation of
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function parameter pack.
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(tsubst_pack_expansion): Likewise.
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* cp-objcp-common.c (cp_common_init_ts): TYPE_ARGUMENT_PACK has
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TS_COMMON.
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13
gcc/cp/pt.c
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gcc/cp/pt.c
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@ -8711,6 +8711,11 @@ tsubst_pack_expansion (tree t, tree args, tsubst_flags_t complain,
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have the wrong value for a recursive call. Just make a
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dummy decl, since it's only used for its type. */
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arg_pack = tsubst_decl (parm_pack, args, complain);
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if (arg_pack && FUNCTION_PARAMETER_PACK_P (arg_pack))
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/* Partial instantiation of the parm_pack, we can't build
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up an argument pack yet. */
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arg_pack = NULL_TREE;
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else
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arg_pack = make_fnparm_pack (arg_pack);
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}
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}
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@ -9801,14 +9806,14 @@ tsubst_decl (tree t, tree args, tsubst_flags_t complain)
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if (DECL_TEMPLATE_PARM_P (t))
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SET_DECL_TEMPLATE_PARM_P (r);
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/* An argument of a function parameter pack is not a parameter
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pack. */
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FUNCTION_PARAMETER_PACK_P (r) = false;
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if (expanded_types)
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/* We're on the Ith parameter of the function parameter
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pack. */
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{
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/* An argument of a function parameter pack is not a parameter
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pack. */
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FUNCTION_PARAMETER_PACK_P (r) = false;
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/* Get the Ith type. */
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type = TREE_VEC_ELT (expanded_types, i);
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@ -1,3 +1,7 @@
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2011-05-25 Jason Merrill <jason@redhat.com>
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* g++.dg/cpp0x/variadic109.C: New.
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2011-05-25 H.J. Lu <hongjiu.lu@intel.com>
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* gcc.target/i386/pause-1.c: New.
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@ -0,0 +1,17 @@
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// PR c++/48292
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// { dg-options -std=c++0x }
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template <typename... Args> int g(Args...);
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template <int N = 0>
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struct A
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{
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template <typename... Args>
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static auto f(Args... args) -> decltype(g(args...));
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};
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int main()
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{
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A<>::f();
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return 0;
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}
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