constant-folding

Transpile a javascript source code file into a constant folded one. Will transpile the following expressions:

• ["a", "b", "c"].join(); array of only literals (number or string) into "a,b,c";
• [a, b, c].pop(); array of identifiers into c;
• [1, 2, 3].slice(0, 1+1); any array into [1, 2];

Installation

To install execute the following command:

npm i

Usage as executable:

Execute the program with the following command.

npx cf <input.js> -o <output>

where:

• input.js is the path to the original javascript source code to transpile into another source code
• output is the path of the file where save the transpiled source code; the constant folded one.

Usage from code:

const constantFolding = require('constant-folding');
//call the function

The documentation of the function.

Examples

src/examples/input_1.js

[a, b, c].slice(0, 2);

Execute:

npx cf src/input_1.js -o src/output_1.js

Transpiled code:

src/examples/output_1.js

[
    a,
    b
];

Author

alu0101056944

[email protected]

Marcos Jesús Barrios Lorenzo

Tests

To run the tests execute the following command:

npm test

API

constantFolding(code) ⇒ string

Kind: global function
Returns: string - ouput javascript source code after constant folding.
Brief: Transform code into an AST, apply constant folding and transform it back into the resultng code.

| Param | Type | Description | | --- | --- | --- | | code | string | input javascript source code. |