std::max_align_t(3)

okay so bestie, welcome to std::max_align_t(3) from the C++ Standard Libary manual — it’s giving tiny-but-mighty C++ energy 💖✨

💖 NAME 💖

• std::max_align_t — std::max_align_t

yes, the name is literally the name. we respect it 💅

🌸 Synopsis 🌸

Defined in header <cstddef>
typedef /*implementation-defined*/ max_align_t;  (since C++11)

okay so the actual tea: std::max_align_t is a trivial standard-layout type whose alignment requirement is at least as strict (as large) as that of every scalar type. periodt ✨

🦋 Notes 🦋

Pointers returned by allocation functions such as std::malloc are suitably aligned for any object, which means they are aligned at least as strictly as std::max_align_t. so if you’re allocating, you’re covered, no cap 🔥

🎀 Example 🎀

// Run this code

#include <cstddef>
#include <iostream>

int main()
{
    std::cout << alignof(std::max_align_t) << '\n';
}

🌈 Possible output 🌈

16

✨ References ✨

• C++23 standard (ISO/IEC 14882:2023):
  • 17.2.4 Sizes, alignments, and offsets [support.types.layout] (p: 504-505)
• C++20 standard (ISO/IEC 14882:2020):
  • 17.2.4 Sizes, alignments, and offsets [support.types.layout] (p: 507-508)
• C++17 standard (ISO/IEC 14882:2017):
  • 21.2.4 Sizes, alignments, and offsets [support.types.layout] (p: 479)
• C++14 standard (ISO/IEC 14882:2014):
  • 18.2 Types [support.types] (p: 443-444)
• C++11 standard (ISO/IEC 14882:2011):
  • 18.2 Types [support.types] (p: 454-455)

🔎 See also 🔎

• alignof operator(C++11) — queries alignment requirements of a type
• alignment_of (C++11) — obtains the type’s alignment requirements (class template)
• is_scalar (C++11) — checks if a type is a scalar type (class template)
• C documentation for max_align_t

source: http://cppreference.com · dated 2024.06.10 · page: std::max_align_t(3) — bye bestie, go check your alignments 💖🦋