#include <memory> int main() { std::unique_ptr<const char[]> p; p.reset(new char[1]); } fails to compile with due to reset invoking swap on two different types. However, this code should be well-formed per N4089.
Seems simple enough to fix: @@ -608,8 +608,9 @@ > >> void - reset(_Up __p) noexcept + reset(_Up __ptr) noexcept { + pointer __p = __ptr; using std::swap; swap(std::get<0>(_M_t), __p); if (__p != nullptr)
Author: redi Date: Mon Oct 17 12:00:44 2016 New Revision: 241235 URL: https://gcc.gnu.org/viewcvs?rev=241235&root=gcc&view=rev Log: PR77987 Fix unique_ptr<T[], D>::reset(U) for T != U PR libstdc++/77987 * include/bits/unique_ptr.h (unique_ptr<T[], D>::reset<U>(U)): Copy value to pointer of the correct type to swap, to support conversions allowed by LWG 2118 / N4089. * testsuite/20_util/unique_ptr/assign/assign_neg.cc: Move test for incompatible deleters from ... * testsuite/20_util/unique_ptr/assign/cv_qual.cc: ... here. * testsuite/20_util/unique_ptr/modifiers/cv_qual.cc: Move tests for incompatible pointers to ... * testsuite/20_util/unique_ptr/modifiers/reset_neg.cc: ... here. Move destructor definition to base class. Test for invalid derived-to-base conversion. Modified: trunk/libstdc++-v3/ChangeLog trunk/libstdc++-v3/include/bits/unique_ptr.h trunk/libstdc++-v3/testsuite/20_util/unique_ptr/assign/assign_neg.cc trunk/libstdc++-v3/testsuite/20_util/unique_ptr/assign/cv_qual.cc trunk/libstdc++-v3/testsuite/20_util/unique_ptr/modifiers/cv_qual.cc trunk/libstdc++-v3/testsuite/20_util/unique_ptr/modifiers/reset_neg.cc
Fixed on trunk so far.
Author: redi Date: Mon Oct 17 18:21:26 2016 New Revision: 241276 URL: https://gcc.gnu.org/viewcvs?rev=241276&root=gcc&view=rev Log: PR77987 Fix unique_ptr<T[], D>::reset(U) for T != U PR libstdc++/77987 * include/bits/unique_ptr.h (unique_ptr<T[], D>::reset<U>(U)): Copy value to pointer of the correct type to swap, to support conversions allowed by LWG 2118 / N4089. * testsuite/20_util/unique_ptr/assign/assign_neg.cc: Move test for incompatible deleters from ... * testsuite/20_util/unique_ptr/assign/cv_qual.cc: ... here. * testsuite/20_util/unique_ptr/modifiers/cv_qual.cc: Move tests for incompatible pointers to ... * testsuite/20_util/unique_ptr/modifiers/reset_neg.cc: ... here. Move destructor definition to base class. Test for invalid derived-to-base conversion. Modified: branches/gcc-6-branch/libstdc++-v3/ChangeLog branches/gcc-6-branch/libstdc++-v3/include/bits/unique_ptr.h branches/gcc-6-branch/libstdc++-v3/testsuite/20_util/unique_ptr/assign/assign_neg.cc branches/gcc-6-branch/libstdc++-v3/testsuite/20_util/unique_ptr/assign/cv_qual.cc branches/gcc-6-branch/libstdc++-v3/testsuite/20_util/unique_ptr/modifiers/cv_qual.cc branches/gcc-6-branch/libstdc++-v3/testsuite/20_util/unique_ptr/modifiers/reset_neg.cc
Fixed for 6.3