std::formatter<std::thread::id>
From cppreference.com
| Defined in header <thread>
|
||
| template< class CharT > struct formatter<std::thread::id, CharT>; |
(since C++23) | |
The template specialization of std::formatter for the std::thread::id class allows users to convert a thread identifier to its textual representation using formatting functions.
Format specification
The syntax of format specifications is:
| fill-and-align (optional) width (optional) | |||||||||
fill-and-align and width have the same meaning as in standard format specification. The default alignment is >.
The formatted output matches the output of operator<<, adjusted as appropriate for the format specifiers.
Notes
| Feature-test macro | Value | Std | Feature |
|---|---|---|---|
__cpp_lib_formatters |
202302L |
(C++23) | Formatting std::thread::id and std::stacktrace
|
Example
Run this code
#include <format> #include <iostream> #include <thread> int main() { std::thread::id this_id = std::this_thread::get_id(); std::thread::id null_id; std::cout << std::format("current thread id: {}\n", this_id); std::cout << std::format("{:=^10}\n", null_id); }
Possible output:
current thread id: 140046396632256 ====0=====
See also
| (C++20) |
defines formatting rules for a given type (class template) |