constant-folding

Installation

npm install @alu0100953275/constant-folding@lastest

Usage as executable:

• bash:

$ ./bin/constant-folding-cli.js input.js output.js 
File read succesfully
Output written succesfully in output.js

• input.js:

var f = 3+null;
var e = 4 | 3;
var d = 3+"c";
var b = 9 +1;
var a = 2+3*5+b;

• output.js:

var f = 3;
var e = 7;
var d = '3c';
var b = 10;
var a = 17 + b;

Usage from code:

const constantFolding = require('constant-folding');
const input = `
var f = 3+null;
var e = 4 | 3;
var d = 3+"c";
var b = 9 +1;
var a = 2+3*5+b;
`;

console.log(constantFolding(input));
/*
  var f = 3;
  var e = 7;
  var d = '3c';
  var b = 10;
  var a = 17 + b;
  */

The documentation of the function.

Author

[email protected]

Tests

• tests.js:

const example1 = `a=2*3;`;
const example2 = `3+null;`;
const example3 = `4 | 3;`;
const example4 = `3+"c";`;
const example5 = `9 +1;`;
const example6 = `2+3*5+b;`;
const expectedOutput1 = `a = 6;`;
const expectedOutput2 = `3;`;
const expectedOutput3 = `7;`;
const expectedOutput4 = `'3c';`;
const expectedOutput5 = `10;`;
const expectedOutput6 = `17 + b;`;

• run test:

$ npm run test

> @alu0100953275/[email protected] test
> mocha



  constantFolding tests
    ✔ works correctly with normal functions 1
    ✔ works correctly with normal functions 2
    ✔ works correctly with normal functions 3
    ✔ works correctly with normal functions 4
    ✔ works correctly with normal functions 5
    ✔ works correctly with normal functions 6


  6 passing (34ms)