std:: operator<< (std::basic_stacktrace)

From cppreference.com
C++
Diagnostics library
std::basic_stacktrace
Defined in header <stacktrace>
template < class Allocator >
std:: ostream & operator << ( std:: ostream & os, const std:: basic_stacktrace < Allocator > & st ) ;
(since C++23)

Inserts the description of st into the output stream os . Equivalent to return os << std:: to_string ( st ) ; .

Parameters

os - an output stream
st - a basic_stacktrace whose description is to be inserted

Return value

os .

Exceptions

May throw implementation-defined exceptions.

Example

Run this code 
#include <stacktrace>
#include <iostream>
 
int main()
{
    std::cout << "The stacktrace obtained in the main function:\n";
    std::cout << std::stacktrace::current() << '\n';
    []{
        std::cout << "The stacktrace obtained in a nested lambda:\n";
        std::cout << std::stacktrace::current() << '\n';
    }();
}

Possible output: 

The stacktrace obtained in the main function:
 0# 0x0000000000402E7B in ./prog.exe
 1# __libc_start_main in /lib/x86_64-linux-gnu/libc.so.6
 2# 0x0000000000402CD9 in ./prog.exe
 
The stacktrace obtained in a nested lambda:
 0# 0x0000000000402DDA in ./prog.exe
 1# 0x0000000000402EB2 in ./prog.exe
 2# __libc_start_main in /lib/x86_64-linux-gnu/libc.so.6
 3# 0x0000000000402CD9 in ./prog.exe

See also

(C++23)
performs stream output of stacktrace_entry
(function template)
Retrieved from " https://en.cppreference.com/mwiki/index.php?title=cpp/utility/basic_stacktrace/operator_ltlt&oldid=148098 "