esoo-babel-plugin

A babel-plugin for ES operator overload.

How to use

1. install package

   npm install esoo-babel-plugin

2. add plugin in .babelrc

   "plugins": ["esoo-babel-plugin"]

3. write your operator in a Class like this

   class Vector{
   
       constructor(x,y){
           [this.x,this.y]=[x,y]
       }
   
       toString(){
           return `Vector(${this.x},${this.y})`;
       }
   
       __add__(b){
           return new Vector(this.x + b.x, this.y + b.y);
       }
   
       __mul__(b){
           return new Vector(this.x * b, this.y * b);
       }
   
       __eq__(b){
           return this.x == b.x && this.y == b.y;
       }
   }

4. import Vector and add oo enable

   'oo enable';
   const Vector=require('../Vector')
   
   let a = new Vector(1, 2), b = new Vector(2, 4);
   
   console.log(`${a + b * 5}`);
   //Vector(11,22)
   console.log(a === b - a);
   //true

examples

You can find demo in /examples, then build and run as follow:

cd examples
npm i
npm run build
cd lib
ndoe index.js

Document

• BinaryExpression

|op| function name| |-|-| |+| __add__(a,b)| |-| __sub__(a,b)| |*| __mul__(a,b)| |/| __div__(a,b)| |%| __mod__(a,b)| |**| __pow__(a,b)| |&| __and__(a,b)| ||| __or__(a,b)| |^| __xor__(a,b)| |<<| __lshift__(a,b)| |>>| __rshift__(a,b)| |<| __lt__(a,b)| |>| __gt__(a,b)| |<=| __le__(a,b)| |>=| __ge__(a,b)| |==| __eq__(a,b)| |===| __eq__(a,b)| |!=| __ne__(a,b)|

• UnaryExpression

|op| function name| |-|-| |-| __neg__(a)| |+| __pos__(a)| |~| __invert__(a)|