[#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);
----

== Return Value

reference providing modifiable access to the frame at `index`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *index*
| zero‐based index of the stack‐trace frame
|===


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