c++: pack init-capture of unresolved overload [PR102629]
commit9ace5d4dab2ab39072b0f07089621a823580f27c
authorJason Merrill <jason@redhat.com>
Tue, 26 Apr 2022 04:19:40 +0000 (26 00:19 -0400)
committerJason Merrill <jason@redhat.com>
Tue, 26 Apr 2022 20:12:08 +0000 (26 16:12 -0400)
tree29717405566f8b37e0082d4d25203d4384bae88d
parent2579d6124d2f1ecf77c6c599f65cebbf29d00fd1
c++: pack init-capture of unresolved overload [PR102629]

Here we were failing to diagnose that the initializer for the capture pack
is an unresolved overload.  It turns out that the reason we didn't recognize
the deduction failure in do_auto_deduction was that the individual 'auto' in
the expansion of the capture pack was still marked as a parameter pack, so
we were deducing it to an empty pack instead of failing.

PR c++/102629

gcc/cp/ChangeLog:

* pt.cc (gen_elem_of_pack_expansion_instantiation): Clear
TEMPLATE_TYPE_PARAMETER_PACK on auto.

gcc/testsuite/ChangeLog:

* g++.dg/cpp2a/lambda-pack-init7.C: New test.
gcc/cp/pt.cc
gcc/testsuite/g++.dg/cpp2a/lambda-pack-init7.C [new file with mode: 0644]