@nlpjs/lexer

TABLE OF CONTENTS

• Introduction
• Installation
• Token Types
• Example of use
• Contributing
• Contributors
• Code of Conduct
• Who is behind it
• License

Introduction

This package provides the class Lexer that is the basic class to build transpilers for languages. It is used by the package @nlpjs/python-compiler to build a transpiler of python to javascript.

Installation

You can install it using NPM

  npm i @nlpjs/lexer

Token Types

• Identifier: 1
• Number: 2
• String: 3
• Operator: 4
• Separator: 5
• EndOfLine: 6
• Assignment: 7
• EndOfFile: 8

Example of use

const { Lexer } = require('@nlpjs/lexer');

const script = `
n = 0
while n < 10:
  n += 1
print("hola")
`

const lexer = new Lexer();
lexer.init(script);
let token;
while (!token || token.type !== Lexer.TokenType.EndOfFile) {
  token = lexer.nextToken();
  console.log(token);
}

This will show in console:

Token { value: 'n', type: 1 }
Token { value: '=', type: 7 }
Token { value: '0', type: 2 }
Token { value: '\n', type: 6 }
Token { value: 'while', type: 1 }
Token { value: 'n', type: 1 }
Token { value: '<', type: 4 }
Token { value: '10', type: 2 }
Token { value: ':', type: 5 }
Token { value: '\n', type: 6 }
Token { value: 'n', type: 1 }
Token { value: '+=', type: 7 }
Token { value: '1', type: 2 }
Token { value: '\n', type: 6 }
Token { value: 'print', type: 1 }
Token { value: '(', type: 5 }
Token { value: 'hola', type: 3 }
Token { value: ')', type: 5 }
Token { value: '', type: 8 }

Contributing

You can read the guide of how to contribute at Contributing.

Contributors

Made with contributors-img.

Code of Conduct

You can read the Code of Conduct at Code of Conduct.

Who is behind it?

This project is developed by AXA Group Operations Spain S.A.

If you need to contact us, you can do it at the email [email protected]

License

Copyright (c) AXA Group Operations Spain S.A.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.