Antlr4 Helper

Overview

The goal of this project is to provided classes and interfaces that
assist with the interaction of Antlr parsers. Making things like
language manipulation and analysis much easier.

Getting Started

bash
npm install -S antlr4-helper


Antlr4 Helper Documentation
 Documentation (Click Here)

JavaScript Examples

$3

javascript
const antlrHelper = require('antlr4-helper');
const TinycLexer = require('./parser/TinycLexer').TinycLexer;
const TinycParser = require('./parser/TinycParser').TinycParser;

const factory = antlrHelper.createFactoryBuilder()
    .lexer((input) => new TinycLexer(input))
    .parser(tokenStream => new TinycParser(tokenStream))
    .rootRule((parser) => parser.program())
    .build();
const parser = antlrHelper.createParser(factory);
parser.parse('variable = 100;');
parser.checkForErrors();

// // Find only variables // parser.filter((rule) => rule.getName() === 'id') .forEach((rule) => { const ruleName = rule.getName(); console.log(ruleName); // id console.log(rule.getText()); // variable });`

`$3`

javascript
const antlrHelper = require('antlr4-helper');
const TinycLexer = require('./parser/TinycLexer').TinycLexer;
const TinycParser = require('./parser/TinycParser').TinycParser;
const factory = antlrHelper.createFactoryBuilder()
    .lexer((input) => new TinycLexer(input))
    .parser(tokenStream => new TinycParser(tokenStream))
    .rootRule((parser) => parser.program())
    .build();
const parser = antlrHelper.createParser(factory);
parser.parse('a = 10;');
parser.checkForErrors(); // No parse errors
//
// Find the first rule
//
const rule = parser.findRuleByName('id');
rule.setText('var');
console.log("The changed text:");
console.log(parser.getText()); //var = 10;

console.log("The replaced variable:"); const varName = rule.getText(); console.log(varName); //var;``

Getting Started

bash
npm install -S antlr4-helper

Antlr4 Helper Documentation

Documentation (Click Here)

JavaScript Examples

$3

javascript
const antlrHelper = require('antlr4-helper');
const TinycLexer = require('./parser/TinycLexer').TinycLexer;
const TinycParser = require('./parser/TinycParser').TinycParser;

const factory = antlrHelper.createFactoryBuilder()
.lexer((input) => new TinycLexer(input))
.parser(tokenStream => new TinycParser(tokenStream))
.rootRule((parser) => parser.program())
.build();

const parser = antlrHelper.createParser(factory);
parser.parse('variable = 100;');
parser.checkForErrors();

//
// Find only variables
//
parser.filter((rule) => rule.getName() === 'id')
    .forEach((rule) => {
        const ruleName = rule.getName();
        console.log(ruleName); // id
        console.log(rule.getText()); // variable
    });

$3

javascript
const antlrHelper = require('antlr4-helper');
const TinycLexer = require('./parser/TinycLexer').TinycLexer;
const TinycParser = require('./parser/TinycParser').TinycParser;

const factory = antlrHelper.createFactoryBuilder()
.lexer((input) => new TinycLexer(input))
.parser(tokenStream => new TinycParser(tokenStream))
.rootRule((parser) => parser.program())
.build();

const parser = antlrHelper.createParser(factory);
parser.parse('a = 10;');
parser.checkForErrors(); // No parse errors

//
// Find the first rule
//
const rule = parser.findRuleByName('id');

rule.setText('var');
console.log("The changed text:");
console.log(parser.getText()); //var = 10;

console.log("The replaced variable:");
const varName = rule.getText();
console.log(varName); //var;