[#BloombergLP-bdlb-Guid-operator_subs]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlb.adoc[bdlb]::xref:BloombergLP/bdlb/Guid.adoc[Guid]::operator[]
:relfileprefix: ../../../
:mrdocs:

Return a reference offering unmodifiable access to the byte at the specified `offset` from the most significant byte of this guid object. The behavior is undefined unless `0 <= offset < k_GUID_NUM_BYTES`.

== Synopsis

Declared in `<bdlb_guid.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
unsigned char const&
operator[](std::size_t offset) const;
----


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