Book Image

Clojure for Domain-specific Languages

By : Ryan D. Kelker
Book Image

Clojure for Domain-specific Languages

By: Ryan D. Kelker

Overview of this book

<p>Clojure is a very new and rapidly growing language that runs on top of the JVM. The language being hosted on the Java platform allows for Clojure applications to use existing Java components. Although there are objects in Clojure, the language is not object oriented.</p> <p>"Clojure for Domain-specific Languages" is an example-oriented guide to building custom languages. Many of the core components of Clojure are covered to help you understand your options when making a domain-specific language. By the end of this book, you should be able to make an internal DSL. Starting with a comparison of existing DSLs, this book will move on to guide you through general programming, Clojure editing, and project management. The chapters after that are code oriented.</p> <p>"Clojure for Domain-specific Languages" tries to expose you to as much Clojure code as possible. Many of the examples are executed in a Read-Evaluate-Print-Loop environment, so the reader can also follow along on their own machine. This book uses Leiningen, but no prior knowledge of it is required.</p> <p>"Clojure for Domain-Specific Languages" aims to make you familiar with the Clojure language and help you learn the tools to make your own language.</p>
Table of Contents (19 chapters)
Clojure for Domain-specific Languages
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Creating and editing CLJ files in Emacs


Once Emacs is set up, test that you don't get any errors when running the Emacs command from your operating system command line. Before moving on to setting up Emacs for Clojure editing, we'll have to cover some basic commands for operating Emacs. These commands will mostly cover buffer or frame manipulation, saving files, opening files, common edit operations, and then closing the Emacs editor.

Emacs has a special notation for expressing keyboard shortcuts. This notation makes it easier to read and write keyboard combinations. The combinations don't always, but do often, display a small message of what was performed by pressing the accepted combination. If the keyboard combination isn't recognized, the mini buffer will display a message stating that the combination hasn't been defined. Although messages are displayed within the mini buffer, the mini buffer can accept keyboard input when some commands require extra parameters. This following chart is...