[Bug c++/93413] Defaulted constexpr Destructor not being found during constant evaluation
cvs-commit at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Thu Nov 3 18:56:33 GMT 2022
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93413
--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Patrick Palka <ppalka@gcc.gnu.org>:
https://gcc.gnu.org/g:c0b38e9fec71dc4cc5e99b1f0cb159c15a8da9ba
commit r13-3638-gc0b38e9fec71dc4cc5e99b1f0cb159c15a8da9ba
Author: Patrick Palka <ppalka@redhat.com>
Date: Thu Nov 3 14:55:35 2022 -0400
c++: constexpr error with defaulted virtual dtor [PR93413]
We're rejecting the below testcase with
error: 'virtual constexpr Base::~Base()' used before its definition
error: 'virtual constexpr Derived::~Derived()' used before its definition
due to special handling in mark_used added by r181272 to defer synthesis
of virtual destructors until EOF (where we can set their linkage), which
in turn makes them effectively unusable during constexpr evaluation.
Fortunately it seems this special handling is unnecessary ever since
r208030 enabled us to tentatively set linkage of all defaulted virtual
destructors, including templated ones. So this patch gets rid of this
special handling.
PR c++/93413
gcc/cp/ChangeLog:
* decl2.cc (mark_used): Don't defer synthesis of virtual
functions.
gcc/testsuite/ChangeLog:
* g++.dg/cpp2a/constexpr-virtual21.C: New test.
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