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Build Your Own Programming Language

You're reading from   Build Your Own Programming Language A programmer's guide to designing compilers, interpreters, and DSLs for solving modern computing problems

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Product type Paperback
Published in Dec 2021
Publisher Packt
ISBN-13 9781800204805
Length 494 pages
Edition 1st Edition
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Author (1):
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Clinton  L. Jeffery Clinton L. Jeffery
Author Profile Icon Clinton L. Jeffery
Clinton L. Jeffery
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Toc

Table of Contents (25) Chapters Close

Preface 1. Section 1: Programming Language Frontends
2. Chapter 1: Why Build Another Programming Language? FREE CHAPTER 3. Chapter 2: Programming Language Design 4. Chapter 3: Scanning Source Code 5. Chapter 4: Parsing 6. Chapter 5: Syntax Trees 7. Section 2: Syntax Tree Traversals
8. Chapter 6: Symbol Tables 9. Chapter 7: Checking Base Types 10. Chapter 8: Checking Types on Arrays, Method Calls, and Structure Accesses 11. Chapter 9: Intermediate Code Generation 12. Chapter 10: Syntax Coloring in an IDE 13. Section 3: Code Generation and Runtime Systems
14. Chapter 11: Bytecode Interpreters 15. Chapter 12: Generating Bytecode 16. Chapter 13: Native Code Generation 17. Chapter 14: Implementing Operators and Built-In Functions 18. Chapter 15: Domain Control Structures 19. Chapter 16: Garbage Collection 20. Chapter 17: Final Thoughts 21. Section 4: Appendix
22. Assessments 23. Other Books You May Enjoy Appendix: Unicon Essentials

Comparing bytecode assembler with binary formats

Bytecode machines tend to use simpler formats than native code, where binary object files are the norm. Some bytecode machines, such as Python, hide their bytecode format entirely or make it optional. Others, such as Unicon, use a human-readable assembler-like text format for compiled modules. In the case of Java, they seem to have gone out of their way to avoid providing an assembler, to make it more difficult for other languages to target their virtual machine (VM).

In the case of Jzero and its machine, we have strong incentives to keep things as simple as possible. The byc class defines two output methods: print() for text format and printb() for binary format. You can decide for yourself which one you prefer.

Printing bytecode in assembler format

The print() method in the byc class is similar to the one used in the tac class. One line of output is produced for each element in the list. The Unicon implementation of the print...

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