diff options
| author | Jason Merrill <jason@redhat.com> | 2017-02-17 13:42:43 -0500 |
|---|---|---|
| committer | Jason Merrill <jason@gcc.gnu.org> | 2017-02-17 13:42:43 -0500 |
| commit | edf1849aa6b55871d799a0e8a574eb752f0b4c8a (patch) | |
| tree | 97498c6d2a37503e994004d5f586097bf392108d | |
| parent | b10c7cd74ac9c17f0aa1cb5dbdb0e1227b421a90 (diff) | |
| download | gcc-edf1849aa6b55871d799a0e8a574eb752f0b4c8a.zip gcc-edf1849aa6b55871d799a0e8a574eb752f0b4c8a.tar.gz gcc-edf1849aa6b55871d799a0e8a574eb752f0b4c8a.tar.bz2 | |
PR c++/79549 - C++17 ICE with non-type auto template parameter pack
* pt.c (convert_template_argument): Just return an auto arg pack.
(tsubst_template_args): Don't tsubst an auto pack type.
From-SVN: r245544
| -rw-r--r-- | gcc/cp/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/cp/pt.c | 11 | ||||
| -rw-r--r-- | gcc/testsuite/g++.dg/cpp1z/nontype-auto8.C | 10 |
3 files changed, 23 insertions, 2 deletions
diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog index 65f2d19..a660c43 100644 --- a/gcc/cp/ChangeLog +++ b/gcc/cp/ChangeLog @@ -1,5 +1,9 @@ 2017-02-17 Jason Merrill <jason@redhat.com> + PR c++/79549 - C++17 ICE with non-type auto template parameter pack + * pt.c (convert_template_argument): Just return an auto arg pack. + (tsubst_template_args): Don't tsubst an auto pack type. + PR c++/79556 - C++17 ICE with non-type auto * pt.c (do_auto_deduction): Don't try to deduce from null type. diff --git a/gcc/cp/pt.c b/gcc/cp/pt.c index 093c0f9..04479d4 100644 --- a/gcc/cp/pt.c +++ b/gcc/cp/pt.c @@ -7612,6 +7612,10 @@ convert_template_argument (tree parm, if (tree a = type_uses_auto (t)) { + if (ARGUMENT_PACK_P (orig_arg)) + /* There's nothing to check for an auto argument pack. */ + return orig_arg; + t = do_auto_deduction (t, arg, a, complain, adc_unify, args); if (t == error_mark_node) return error_mark_node; @@ -11649,8 +11653,11 @@ tsubst_template_args (tree t, tree args, tsubst_flags_t complain, tree in_decl) new_arg = error_mark_node; if (TREE_CODE (new_arg) == NONTYPE_ARGUMENT_PACK) { - TREE_TYPE (new_arg) = tsubst (TREE_TYPE (orig_arg), args, - complain, in_decl); + if (type_uses_auto (TREE_TYPE (orig_arg))) + TREE_TYPE (new_arg) = TREE_TYPE (orig_arg); + else + TREE_TYPE (new_arg) = tsubst (TREE_TYPE (orig_arg), args, + complain, in_decl); TREE_CONSTANT (new_arg) = TREE_CONSTANT (orig_arg); if (TREE_TYPE (new_arg) == error_mark_node) diff --git a/gcc/testsuite/g++.dg/cpp1z/nontype-auto8.C b/gcc/testsuite/g++.dg/cpp1z/nontype-auto8.C new file mode 100644 index 0000000..da4c88b --- /dev/null +++ b/gcc/testsuite/g++.dg/cpp1z/nontype-auto8.C @@ -0,0 +1,10 @@ +// PR c++/79549 +// { dg-options -std=c++1z } + +template <auto...> +struct meow; + +template <auto C> +struct meow<C> { }; + +meow<1> m; |