std::to_chars_result(3) C++ Standard Libary std::to_chars_result(3) NAME std::to_chars_result - std::to_chars_result Synopsis Defined in header <charconv> struct to_chars_result; (since C++17) std::to_chars_result is the return type of std::to_chars. It has no base classes, and only has the following members. Notes Feature-test macro Value Std Feature 201611L (C++17) Elementary string conversions (std::to_chars, __cpp_lib_to_chars std::from_chars) 202306L (C++26) Testing for success or failure of <charconv> functions Example // Run this code #include <array> #include <charconv> #include <iostream> #include <string_view> #include <system_error> void show_to_chars(auto... format_args) { std::array<char, 10> str; #if __cpp_lib_to_chars >= 202306L // use C++26 operator bool() for error checking if (auto res = std::to_chars(str.data(), str.data() + str.size(), for- mat_args...)) std::cout << std::string_view(str.data(), res.ptr) << '\n'; else std::cout << std::make_error_code(res.ec).message() << '\n'; #else if (auto [ptr, ec] = std::to_chars(str.data(), str.data() + str.size(), for- mat_args...); ec == std::errc()) std::cout << std::string_view(str.data(), ptr) << '\n'; else std::cout << std::make_error_code(ec).message() << '\n'; #endif } int main() { show_to_chars(42); show_to_chars(+3.14159F); show_to_chars(-3.14159, std::chars_format::fixed); show_to_chars(-3.14159, std::chars_format::scientific, 3); show_to_chars(3.1415926535, std::chars_format::fixed, 10); } Possible output: 42 3.14159 -3.14159 -3.142e+00 Value too large for defined data type See also to_chars converts an integer or floating-point value to a character se- quence (C++17) (function) http://cppreference.com 2024.06.10 std::to_chars_result(3)
Want to link to this manual page? Use this URL:
<https://man.FreeBSD.org/cgi/man.cgi?query=std::to_chars_result&sektion=3&manpath=FreeBSD+Ports+15.1.quarterly>