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regjsgen

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regjsgen

Generate regular expressions from regjsparser’s AST.


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Maintainers
1
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8,000,417
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2 kB
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Package description

What is regjsgen?

The regjsgen package is used to generate regular expressions from parsed structures. It is often used in conjunction with packages like regjsparser, which parses regular expression strings into a structured format that regjsgen can then turn back into regular expression strings. This can be useful for manipulating and generating regular expressions programmatically.

What are regjsgen's main functionalities?

Generate regular expressions from parsed objects

This feature allows you to generate a regular expression string from a parsed regular expression object. The example shows how to generate a simple literal regular expression.

const regjsgen = require('regjsgen');
const parsedRegex = {
  type: 'literal',
  body: 'hello',
  raw: 'hello'
};
const regexString = regjsgen.generate(parsedRegex);
console.log(regexString); // Output: 'hello'

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Source

regjsgen Build status Code coverage status

Generate regular expressions from regjsparser’s AST.

Installation

npm i regjsgen

API

regjsgen.generate(ast)

This function accepts an abstract syntax tree representing a regular expression (see regjsparser), and returns the generated regular expression string.

const regjsparser = require('regjsparser');
const regjsgen = require('regjsgen');

// Generate an AST with `regjsparser`.
let ast = regjsparser.parse(regex);

// Modify AST
// …

// Generate `RegExp` string with `regjsgen`.
let regex = regjsgen.generate(ast);

Support

Tested on Node.js 16 and 18.
Compatible with regjsparser v0.10.0’s AST.

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Last updated on 06 Jun 2023

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