Make the capacity of this array at least the specified numElements, assuming the number of unique elements in this array does not exceed the greater of the specified numUniqueElements and uniqueLength(). This method has no effect if the current capacity meets or exceeds the required capacity. The behavior is undefined unless numUniqueElements <= numElements and 0 < numUniqueElements || 0 == numElements.
Declared in <bdlc_compactedarray.h>
void
reserveCapacity(
std::size_t numElements,
std::size_t numUniqueElements);