Toby Ho Course on How to Make a Parser with Nearley.JS

Part One

In this drive by code session we’ll show you what a context-free grammar is and how to use it and Nearley to build parsers. JSON is used as the example language we’ll build the parser for.

Part Two

In this drive by code session we continue making a JSON parser. After having make a working parser for a subset of the functionality in JSON, we’ll introduce the ability to embed JavaScript code in the grammar to customize the result of a parse. Again, Waikit wrote the code, and I’ll replay them and explain what he did. Enjoy!

Part Three

In this drive by code session we’ll demonstrate how to handle whitespaces in a grammar using Nearley.js. The convention used in the video is based on the recommendations by Kartik Chandra - the creator of Nearley.js. As usual, Waikit drove the code before hand, and I’ll replay his code session and explain what he did.

Part Four

In this episode we’ll demonstrate how to parse a string literal in JSON properly, continuing our series on building parsers using Nearley.js.

Part Five

Continuing in the series on making parsers, this time, we build a calculator that can add, subtract, multiply and divide. In particular, we tackle the issue of operator precedence.