540a22d243
Since resolution of Issue 2593 [1] we can consider that equal allocators before the propagate-on-move-assignment operations will still be equal afterward. So we can extend the optimization of transfering the storage of the move-to instance to the move-from one that is currently limited to always equal allocators. [1] https://cplusplus.github.io/LWG/issue2593 libstdc++-v3/ChangeLog: * include/bits/basic_string.h (operator=(basic_string&&)): Transfer move-to storage to the move-from instance when allocators are equal. * testsuite/21_strings/basic_string/allocator/char/move_assign.cc (test04): New test case. |
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