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This implements the proposed changes for LWG 3537 (which we're allowed to do as an extension whatever the outcome of the issue). I noticed we didn't implement LWG 2280 completely, as the std::begin and std::end overloads for arrays were not noexcept. libstdc++-v3/ChangeLog: * include/bits/range_access.h (begin(T (&)[N]), end(T (&)[N])): Add missing 'noexcept' as per LWG 2280. (rbegin(T (&)[N]), rend(T (&)[N]), rbegin(initializer_list<T>)) (rend(initializer_list<T>)): Add 'noexcept' as per LWG 3537. * testsuite/24_iterators/range_access/range_access.cc: Check for expected noexcept specifiers. Check result types of generic std::begin and std::end overloads. * testsuite/24_iterators/range_access/range_access_cpp14.cc: Check for expected noexcept specifiers. * testsuite/24_iterators/range_access/range_access_cpp17.cc: Likewise.
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