https://github.com/rob-blackbourn/example-operator-overloading

An example using @jetblack/operator-overloading
https://github.com/rob-blackbourn/example-operator-overloading

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An example using @jetblack/operator-overloading

• Host: GitHub
• URL: https://github.com/rob-blackbourn/example-operator-overloading
• Owner: rob-blackbourn
• Created: 2020-07-04T13:32:11.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2023-03-05T04:02:43.000Z (over 1 year ago)
• Last Synced: 2024-03-15T00:56:04.240Z (8 months ago)
• Language: JavaScript
• Size: 345 KB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 3
• Metadata Files:
  • Readme: README.md

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README

        
# example-operator-overloading

This project demonstrates how to use [@jetblack/operator-overloading](https://github.com/rob-blackbourn/jetblack-operator-overloading).

## Usage

```bash

npm install

npm start

```

## Installation

You can add the plugin to your project by adding the npm package.

```bash

npm install --save-dev @jetblack/operator-overloading

```

The babel file will look something like this.

```json

{

  "presets": [

      [

        "@babel/preset-env",

        {

          "targets": {

            "node": "current"

          }

        }

      ]

  ],

  "plugins": ["module:@jetblack/operator-overloading"]

}

```

## The code

Here is the code. We need to enable the overloading with the `'operator-overloading enabled'`

statement.

```javascript

'operator-overloading enabled'

class Point {

  constructor(x, y) {

      this.x = x

      this.y = y

  }

  

  [Symbol.for('+')](other) {

      const x = this.x + other.x

      const y = this.y + other.y

      return new Point(x, y)

  }

}

// Check primitives still work

const i1 = 3

const i2 = 4

const i3 = i1 + i2

console.log(i3)

// Check overloads work

const p1 = new Point(5, 5)

const p2 = new Point(2, 3)

const p3 = p1 + p2

console.log(p3)

// What happens with nulls?

const s1 = null

const s2 = 'hello'

const s3 = s1 + s2

console.log(s3)

console.log('Done')

```