opCode

In this book, we jump into a virtual machine, compiler and opcodes, without needing to read about parsing first. The language is already written, meaning you can dive into the source code of a working language right from the start (a scripting language called langur, written in Go). Discover how to develop some very useful features, such as multi-variable assignment, decoupling assignment, string interpolation, short-circuiting operators, for loops, scoped if expressions, and more. We review how opcodes make these things work in a stack-based virtual machine.

Chapters are as follows.

1: general overview

2: opcodes

3: the VM

4: running langur

5: little things

6: constants

7: retrieving non-constant values

8: operators

9: building things

10: declaration and assignment

11: user-defined functions

12: built-in functions

13: for loops

14: if / given expressions

15: exceptions