From cppreference.com
const_referenceoperator[](size_typepos)const;(since C++23)Returns a reference to the entry at specified location pos. No bounds checking is performed.
If pos<size() is false, the behavior is undefined.
(until C++26)If pos<size() is false:
If the implementation is
, a
occurs.
If the implementation is not hardened, the behavior is undefined.
(since C++26)Parameters
pos - position of the stacktrace entry to return Return value
Reference to the requested entry.
Exceptions
Throws nothing.
Complexity
Constant.
Example
See also
access specified stacktrace entry with bounds checking
(public member function)