[#BloombergLP-balst-StackTrace-operator_subs-02] = xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/balst.adoc[balst]::xref:BloombergLP/balst/StackTrace.adoc[StackTrace]::operator[] :relfileprefix: ../../../ :mrdocs: Return a reference providing modifiable access to the stack‐trace frame at the specified `index`. The behavior is undefined unless `0 <= index < length()`. == Synopsis Declared in `<balst_stacktrace.h>` [source,cpp,subs="verbatim,replacements,macros,-callouts"] ---- xref:BloombergLP/balst/StackTraceFrame.adoc[StackTraceFrame]& operator[](int index); ---- [.small]#Created with https://www.mrdocs.com[MrDocs]#