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The Complete Rust Programming Reference Guide

You're reading from   The Complete Rust Programming Reference Guide Design, develop, and deploy effective software systems using the advanced constructs of Rust

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Product type Course
Published in May 2019
Publisher Packt
ISBN-13 9781838828103
Length 698 pages
Edition 1st Edition
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Concepts
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Authors (3):
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Vesa Kaihlavirta Vesa Kaihlavirta
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Vesa Kaihlavirta
Rahul Sharma Rahul Sharma
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Rahul Sharma
Claus Matzinger Claus Matzinger
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Claus Matzinger
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Table of Contents (29) Chapters Close

Title Page
Copyright
About Packt
Contributors
Preface
1. Getting Started with Rust FREE CHAPTER 2. Managing Projects with Cargo 3. Tests, Documentation, and Benchmarks 4. Types, Generics, and Traits 5. Memory Management and Safety 6. Error Handling 7. Advanced Concepts 8. Concurrency 9. Metaprogramming with Macros 10. Unsafe Rust and Foreign Function Interfaces 11. Logging 12. Network Programming in Rust 13. Building Web Applications with Rust 14. Lists, Lists, and More Lists 15. Robust Trees 16. Exploring Maps and Sets 17. Collections in Rust 18. Algorithm Evaluation 19. Ordering Things 20. Finding Stuff 21. Random and Combinatorial 22. Algorithms of the Standard Library 1. Other Books You May Enjoy Index

Built-in macros in the standard library


Apart from println!, there are other useful macros in the standard library that are implemented using the macro_rules! macro. Knowing about them will help us appreciate the places and situations where using a macro is a cleaner solution, while not sacrificing readability.

Some of these macros are as follows:

  • dbg!: This allows you to print the value of expressions with their values. This macro moves whatever is passed to it, so if you only want to give read access to their types, you need to pass a reference to this macro instead. It's quite handy as a tracing macro for expressions during runtime.
  • compile_error!: This macro can be used to report an error from code at compile time. This is a handy macro to use when you are building your own macro and want to report any syntactic or semantic errors to the user.
  • concat!: This macro can be used to concatenate any number of literals passed to it and returns the concatenated literals as a&'static str.
  • env...
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