Option

Very lightweight implementation of Rust like Option type for C++. Heavily inspired by C++17 header <optional>. I created it to keep dataflow more organised on embedded hardware with small types like uints and floats, where i do not have access to the <optional> header. If possible always use the <expected> header in C++23 or <optional> in C++17.

Installation

Clone repository using submodules, or download raw-file from https://raw.githubusercontent.com/ahartlba/option/refs/heads/main/option.h.

Using Curl

An example using curl to download. Set your path to where you want to download file to and run

curl https://raw.githubusercontent.com/ahartlba/option/refs/heads/main/option.h > option.h

Example

#include "option.h"
#include <cmath>
#include <iostream>

Option<float> Fraction(float num, float den) {
    if (fabsf(den) <= static_cast<float>(1e-6))
        return {};
    return num/den; 
}

int main() {
    auto f = Fraction(1.2f, 0.1f);
    std::cout << "Sucessfull: " << f.has_value()<< std::endl;
    if (f)
        std::cout << *f << std::endl;
}