https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80096
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
commit b1363399fad470a536bd8731be39c3fbfe4e6fad
Author: jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed Nov 9 20:02:50 2016 +0000
Implement P0127R2, Declaring non-type parameters with auto.
gcc/cp/
* cp-tree.h (enum auto_deduction_context): Add adc_unify.
* decl.c (grokdeclarator): Allow 'auto' in C++17 template non-type
parameter types.
* pt.c (do_auto_deduction): Add outer_targs parameter.
(convert_template_argument): Call do_auto_deduction. If adc_unify,
don't give up on dependent init.
(unify): Likewise. In C++17, walk into the type of a
TEMPLATE_PARM_INDEX.
(for_each_template_parm): Add any_fn parameter.
(struct pair_fn_data): Likewise.
(for_each_template_parm_r): Call it for any tree. In C++17, walk
into the type of a TEMPLATE_PARM_INDEX.
(zero_r, array_deduction_r, try_array_deduction): New.
(type_unification_real): Call try_array_deduction.
(get_partial_spec_bindings): Likewise.
gcc/c-family/
* c-cppbuiltin.c (c_cpp_builtins): Define __cpp_template_auto.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@242017
138bc75d-0d04-0410-961f-82ee72b054a4
