table of contents
std::basic_stacktrace::rbegin,std::basic_stacktrace::crbegin(3) | C++ Standard Libary | std::basic_stacktrace::rbegin,std::basic_stacktrace::crbegin(3) |
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)
2024.06.10 | http://cppreference.com |