std::experi...ator!,~,+,-(3)

💅 NAME 💅

okay bestie, welcome to the std::experi...ator!,~,+,-(3) page, straight outta the C++ Standard Libary manual 🫶. The names on this one are std::experimental::simd::operator!,~,+,- - and std::experimental::simd::operator!,~,+,- — yes, both, and that trailing dash is literally part of the NAME section 💖.

✨ Synopsis ✨

mask_type operator!() const noexcept; (1) (parallelism TS v2)
simd operator~() const noexcept;      (2) (parallelism TS v2)
simd operator+() const noexcept;      (3) (parallelism TS v2)
simd operator-() const noexcept;      (4) (parallelism TS v2)

lowkey the whole idea: it applies the given unary operator on each element of the simd 💫. Here's the breakdown, no skips:

1. Returns a simd_mask<T, Abi> where the i^th element equals !operator[](i) for all i in the range of [0, size()). 💅
2. Returns a simd where each bit is the inverse of the corresponding bit in *this. This overload participates in overload resolution only if T is an integral type. 🧚
3. Returns a copy of itself. iconic. 🎀
4. Returns a simd where the i^th element is initialized to -operator[](i) for all i in the range of [0, size()). 🔥

🌸 Example 🌸

// Run this code

#include <cstddef>
#include <experimental/simd>
#include <iostream>
#include <string_view>
namespace stdx = std::experimental;

void println(std::string_view op, const stdx::native_simd_mask<int> x)
{
    std::cout << op << ": ";
    for (std::size_t i = 0; i < x.size(); ++i)
        std::cout << std::boolalpha << x[i] << ' ';
    std::cout << '\n';
}

void println(std::string_view op, const stdx::native_simd<int> x)
{
    std::cout << op << ": ";
    for (std::size_t i = 0; i < x.size(); ++i)
        std::cout << x[i] << ' ';
    std::cout << '\n';
}

int main()
{
    const stdx::native_simd<int> a([](int i) { return i; });

    println("  a", a);
    println(" !a", !a);
    println(" ~a", ~a);
    println("~~a", ~~a);
    println(" +a", +a);
    println(" -a", -a);
    println("+-a", +-a);
}

🍓 Possible output 🍓

          a: 0 1 2 3
         !a: true false false false
         ~a: -1 -2 -3 -4
        ~~a: 0 1 2 3
         +a: 0 1 2 3
         -a: 0 -1 -2 -3
        +-a: 0 -1 -2 -3

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