Backport prevector fixes #923
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Fixes a bug in which pop_back did not call the deleted item's destructor. Using the most general erase() implementation to implement all the others prevents similar bugs because the coupling between deallocation and destructor invocation only needs to be maintained in one place. Also reduces duplication of complex memmove logic.
swap was using an incorrect condition to determine when to apply an optimization (not swapping the full direct[] when swapping two indirect prevectors). Rather than correct the optimization I'm removing it for simplicity. Removing this optimization minutely improves performance in the typical (currently only) usage of member swap(), which is swapping with a freshly value-initialized object.
- add a swap operation to prevector tests (fails due to broken prevector::swap) - fix 2 prevector test operation conditions that were impossible
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utACK |
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Merging fixes for
prevector(this class is used in serialization) from bitcoin master branch.