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We include realloc-style reallocation in the interface

This is probably the most questionable design decision. It would have probably been a bit more useful to provide a version of reallocate that either changed the size of the existing object without copying or returned NULL. This would have made it directly useful for objects with copy constructors. It would also have avoided unnecessary copying in cases in which the original object had not been completely filled in.

Unfortunately, this would have prohibited use of realloc from the C library. This in turn would have added complexity to many allocator implementations, and would have made interaction with memory-debugging tools more difficult. Thus we decided against this alternative.

The actual version of reallocate is still quite useful for container specializations to specific element types. The STL implementation is starting to take advantage of that.


Deallocate requires size argument | Standard Template Library Programmer`s Guide | Release 3.3: June 8, 2000







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