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std::basic_stacktrace<Allocator>:: size

From cppreference.net
C++
Diagnostics library
std::basic_stacktrace
size_type size ( ) const noexcept ;
(since C++23)

Returns the number of entries in the stacktrace.

Contents

Parameters

(none)

Return value

The number of entries in the stacktrace.

Complexity

Constant.

Example

The following code uses size to display the number of entries in the current stacktrace:

Run this code 
#include <stacktrace>
#include <iostream>
int main()
{ 
    auto trace = std::stacktrace::current();
    std::cout << "trace contains " << trace.size() << " entries.\n";
}

Possible output: 

trace contains 3 entries.

See also

checks whether the basic_stacktrace is empty
(public member function)
returns the maximum possible number of stacktrace entries
(public member function)