std::to_string(3)

🎀 std::to_string(3) 🎀

Okay bestie, welcome to std::to_string(3) from the C++ Standard Libary manual. This page is literally about std::to_string for a std::stacktrace_entry, and it’s giving “describe that stacktrace entry” main character energy. 💅

🌸 NAME 🌸

std::to_string - std::to_string. No cap, fr fr.

✨ Synopsis ✨

Defined in header <stacktrace>
std::string to_string( const std::stacktrace_entry& f );  (since C++23)

Returns a string with a description of f.

The standard recommends that the description should provide information about the contained evaluation, including information from f.source_file() and f.source_line(). Obsessed with the specificity, ngl. 🫶

💖 Parameters 💖

• f — a stacktrace_entry whose description is to be returned. That’s the whole assignment, bestie.

🫶 Return value 🫶

A string with a description of f. Slay. ✨

😭 Exceptions 😭

May throw implementation-defined exceptions. So yeah, it can throw, and the implementation gets to decide the details — no cap. 💀

🧚 Notes 🧚

Custom allocators support for this function is not provided, because the implementations usually require platform specific allocations, system calls and a lot of CPU intensive work, while a custom allocator does not provide benefits for this function as the platform specific operations take an order of magnitude more time than the allocation. So it’s a whole platform-specific situation — lowkey not the place for a custom allocator. 🙈

🌈 Example 🌈

// Run this code

#include <stacktrace>
#include <string>
#include <iostream>

int main()
{
    auto st = std::stacktrace::current();
    std::cout <<
        "Description of an empty stacktrace entry:\n" +
        std::to_string(std::stacktrace_entry{}) << '\n';
    if (st.size() > 0) {
        std::cout <<
            "Description of a non-empty stacktrace entry:\n" +
            std::to_string(st[0]) << '\n';
    }
}

Possible output:

Description of an empty stacktrace entry:

Description of a non-empty stacktrace entry:
0x0000000000402DE9 in ./prog.exe

👑 See also 👑

• to_string — returns a string with a description of the basic_stacktrace (C++23) (function template)

Source: http://cppreference.com · Version/date: 2024.06.10 · Page: std::to_string(3). Bye bestie, go describe those stacktrace entries 💖✨