NAME¶

std::basic_stacktrace::rbegin,std::basic_stacktrace::crbegin - std::basic_stacktrace::rbegin,std::basic_stacktrace::crbegin

Synopsis¶

const_reverse_iterator rbegin() const noexcept; (1) (since C++23)
const_reverse_iterator crbegin() const noexcept; (2) (since C++23)

Returns a reverse iterator to the first entry of the reversed basic_stacktrace. It
corresponds to the last entry of the original basic_stacktrace. If the
basic_stacktrace is empty, the returned iterator is equal to rend().

range-rbegin-rend.svg

Parameters¶

(none)

Return value¶

Reverse iterator to the first entry.

Complexity¶

Constant.

Example¶

// Run this code

#include <algorithm>
#include <iostream>
#include <stacktrace>

int main()
{
auto trace = std::stacktrace::current();
auto empty_trace = std::stacktrace{};

// Print stacktrace.
std::for_each(trace.rbegin(), trace.rend(),
[](const auto& f) { std::cout << f << '\n'; });

if (empty_trace.rbegin() == empty_trace.rend())
std::cout << "stacktrace 'empty_trace' is indeed empty.\n";
}

Possible output:¶

0x0000000000402A29 in ./prog.exe
__libc_start_main in /lib/x86_64-linux-gnu/libc.so.6
0x0000000000402BA5 in ./prog.exe
stacktrace 'empty_trace' is indeed empty.

See also¶

rend returns a reverse iterator to the end
crend (public member function)