17bc3848e0
The LWG issue proposes to add a conditional noexcept-specifier to std::unique_ptr's dereference operator. The issue is currently in Tentatively Ready status, but even if it isn't voted into the draft, we can do it as a conforming extensions. This commit also adds a similar noexcept-specifier to operator[] for the unique_ptr<T[], D> partial specialization. Also ensure that all dereference operators for shared_ptr are noexcept, and adds tests for the std::optional accessors modified by the issue, which were already noexcept in our implementation. Signed-off-by: Jonathan Wakely <jwakely@redhat.com> libstdc++-v3/ChangeLog: * include/bits/shared_ptr_base.h (__shared_ptr_access::operator[]): Add noexcept. * include/bits/unique_ptr.h (unique_ptr::operator*): Add conditional noexcept as per LWG 2762. * testsuite/20_util/shared_ptr/observers/array.cc: Check that dereferencing cannot throw. * testsuite/20_util/shared_ptr/observers/get.cc: Likewise. * testsuite/20_util/optional/observers/lwg2762.cc: New test. * testsuite/20_util/unique_ptr/lwg2762.cc: New test. |
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