W3cubDocs
/C++std::basic_stacktrace<Allocator>::begin, std::basic_stacktrace<Allocator>::cbegin
const_iterator begin() const noexcept; | (1) | (since C++23) |
const_iterator cbegin() const noexcept; | (2) | (since C++23) |
Returns an iterator to the first entry of the basic_stacktrace.
If the basic_stacktrace is empty, the returned iterator is equal to end().
Parameters
(none).
Return value
Iterator to the first entry.
Complexity
Constant.
Example
#include <algorithm>
#include <iostream>
#include <stacktrace>
int main()
{
auto trace = std::stacktrace::current();
auto empty_trace = std::stacktrace{};
// Print stacktrace.
std::for_each(trace.begin(), trace.end(),
[](const auto& f) { std::cout << f << '\n'; });
if (empty_trace.begin() == empty_trace.end())
std::cout << "stacktrace 'empty_trace' is indeed empty.\n";
}Possible output:
0x0000000000402BA8 in ./prog.exe __libc_start_main in /lib/x86_64-linux-gnu/libc.so.6 0x0000000000402A29 in ./prog.exe stacktrace 'empty_trace' is indeed empty.
See also
|
(C++23) | returns an iterator to the end (public member function) |
© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/w/cpp/utility/basic_stacktrace/begin