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

Shift the values in this array to the left by the specified `numBits` positions, with the high‐order values "rotating" into the low‐order bits. The behavior is undefined unless `numBits <= length()`. Note that the length of this array remains unchanged.

== Synopsis

Declared in `<bdlc_bitarray.h>`

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


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