[#BloombergLP-bdlc-BitArray-reserveCapacity]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlc.adoc[bdlc]::xref:BloombergLP/bdlc/BitArray.adoc[BitArray]::reserveCapacity
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:mrdocs:

Reserve sufficient internal capacity to accommodate a length of at least the specified `numBits` without reallocation. If an exception is thrown during this reallocation attempt (i.e., by the memory allocator indicated at construction) the value of this array is guaranteed to be unchanged.

== Synopsis

Declared in `<bdlc_bitarray.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
reserveCapacity(std::size_t numBits);
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