Technical requirements

This chapter will take you through some real technical content. To follow along, you will need to install some tools and download the examples. Let's start by taking a look at how to install UFlex and JFlex.

UFlex comes with Unicon and requires no separate installation. You can download this book's examples from our GitHub repository: https://github.com/PacktPublishing/Build-Your-Own-Programming-Language/tree/master/ch3.

The Code in Action video for the chapter can be found here: https://bit.ly/3Fnn2c2

For JFlex, download jflex-1.8.2.tar.gz (or newer) from http://jflex.de/download.html. You will have to decompress it from a .tar.gz file into a .tar file with gunzip, and then extract the files from the .tar file with tar. It will extract itself into a subdirectory under the directory where you run tar.

For example, you will see a subdirectory named jflex-1.8.2. On Windows, wherever you extract JFlex, if you do not move your JFlex installation...