Writing an interpreted programming language

A programming language is an artificial language designed to express computations that can be performed by a machine, particularly a computer. In reality, a programming language is just a vocabulary and set of grammatical rules for instructing a computer to perform specific tasks. Regardless of what language we use, we eventually need to convert our program into machine language so that the computer can understand it. There are two ways to do this:

Writing an interpreted programming language

Apr 3, The Great Wave off KanagawaKatsushika Hokusai As someone who writes code, you undoubtedly do so using one or multiple programming languages. You probably enjoy writing code in some programming languages because of their elegance, expressive power or any other reason and you also have probably kept your distance from other programming languages because of, maybe, some of their features that you think are badly implemented.

Have you, however, thought about how those programming languages we love and hate came to be? How those particular features we like or do not like are designed and implemented and why?

How those magic black boxes that are compilers and interpreters work? How code written in JavaScript, Ruby, Python, etc, turns into an executable program? Or have you ever thought about building your own programming language? If your answer to any of the above questions is yes, welcome to this series of articles about building a programming language.

This series will take you from 0 to 1 in building a functional interpreter for a programming language. At the end of the series, you will have an interpreter, that you built from scratch, run programs written in a programming language that we would have designed together.

writing an interpreted programming language

Why learn how to implement a programming language? Building a compiler or interpreter will make you a better programmer. Compilers and interpreters encompass interesting data structures and algorithms, the knowledge of which is applicable and useful to other domains.

Contribute to the development of your favorite programming language. Many interesting programming languages are open source and welcome new contributors but often, the knowledge necessary to contribute is a barrier to entry for most people who never took a CS compiler course.

This article is the introduction to a series of which each article will introduce the concepts and knowledge necessary to complete one specific step in implementing a programming language.

The challenge will prompt you to implement a well-defined component of your interpreter.

Jul 13,  · An interpreted language is a programming language which, in its primary use case, involves the programmer writing code that will be executed by an interpreter, rather than being compiled into object code that is . Jul 13,  · An interpreted language is a programming language which, in its primary use case, involves the programmer writing code that will be executed by an interpreter, rather than being compiled into object code that is loadable by the operating system and executed by the CPU directly. Programming languages generally fall into one of two categories: Compiled or Interpreted. With a compiled language, code you enter is reduced to a set of machine-specific instructions before being saved as an executable file.

There will be some test files to download at the end of each article and you complete the challenge by writing the code to make all the tests pass. By the time you complete all the challenges, you will have a full working interpreter that can run code written in our programming language.

Although any programming language can be used to complete the challenges, for this series, our implementation language will be JavaScriptES6 more precisely mostly so that the series will be accessible to a wider audience.

Our programming language, specifically designed for the purpose of this series, is called Blink. Additionally, there is a special type Unit to express the absence of value similar to void in Java and all types in Blink inherit from a supertype Object.An interpreted language is a type of programming language for which most of its implementations execute instructions directly and freely, without previously compiling a program into machine-language instructions.

Programming languages generally fall into one of two categories: Compiled or Interpreted. With a compiled language, code you enter is reduced to a set of machine-specific instructions before being saved as an executable file.

Writing An Interpreter In Go and Writing A Compiler In Go in one package for a reduced bundle price! Both books in ePub (iBook), Mobi (Kindle), PDF and HTML. The complete code presented in both books, including the Monkey interpreter from Writing An Interpreter In Go and the Monkey bytecode compiler and virtual machine from Writing A Compiler.

Table of Contents

Let’s Build a Programming Language. The Great Wave off Kanagawa, As you can see, Blink has the necessary concepts to express almost any program, is simple enough to tackle writing an interpreter for it in a relatively small amount of time and has some interesting features like its usage of objects and expressions.

An interpreted language is a type of programming language for which most of its implementations execute instructions directly and freely, without previously compiling . List of programming languages by type OptimJ – an extension of the Java programming language with language support for writing optimization models and powerful from source code form, by an interpreter.

Theoretically, any language can be compiled or interpreted, so the term *interpreted language* generally refers to .

How to implement a programming language (tutorial for beginners)