Tutorial

Tutorial: Building a Calculator

In this tutorial, we will build a cross-language Calculator library.

Setup

bridge new calculator
cd calculator

Implementation

We will create a specific Calculator struct.

use bridgerust::prelude::*;

#[bridge]
struct Calculator {
    value: f64
}

#[bridge_methods]
impl Calculator {
    #[constructor]
    fn new() -> Self {
        Self { value: 0.0 }
    }

    #[method]
    fn add(&mut self, val: f64) {
        self.value += val;
    }

    #[method]
    fn result(&self) -> f64 {
        self.value
    }
}

Usage

Python

from calculator import Calculator
c = Calculator()
c.add(10.0)
print(c.result())

Node.js

import { Calculator } from "calculator";
const c = new Calculator();
c.add(10.0);
console.log(c.result());