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% The Advanced Rust Programming Language
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% The Rustonomicon
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#### The Dark Arts of Advanced and Unsafe Rust Programming
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# NOTE: This is a draft document, and may contain serious errors
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# NOTE: This is a draft document, and may contain serious errors
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So you've played around with Rust a bit. You've written a few simple programs
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> Instead of the programs I had hoped for, there came only a shuddering blackness
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and you think you grok the basics. Maybe you've even read through *[The Rust
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and ineffable loneliness; and I saw at last a fearful truth which no one had
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Programming Language][trpl]* (TRPL). Now you want to get neck-deep in all the
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ever dared to breathe before — the unwhisperable secret of secrets — The fact
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nitty-gritty details of the language. You want to know those weird corner-cases.
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that this language of stone and stridor is not a sentient perpetuation of Rust
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You want to know what the heck `unsafe` really means, and how to properly use
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as London is of Old London and Paris of Old Paris, but that it is in fact
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it. This is the book for you.
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quite unsafe, its sprawling body imperfectly embalmed and infested with queer
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animate things which have nothing to do with it as it was in compilation.
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To be clear, this book goes into serious detail. We're going to dig into
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exception-safety and pointer aliasing. We're going to talk about memory
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This book digs into all the awful details that are necessary to understand in
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models. We're even going to do some type-theory. This is stuff that you
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order to write correct Unsafe Rust programs. Due to the nature of this problem,
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absolutely don't need to know to write fast and safe Rust programs.
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it may lead to unleashing untold horrors that shatter your psyche into a billion
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You could probably close this book *right now* and still have a productive
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infinitesimal fragments of despair.
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and happy career in Rust.
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Should you wish a long and happy career of writing Rust programs, you should
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However if you intend to write unsafe code -- or just really want to dig into
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turn back now and forget you ever saw this book. It is not necessary. However
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the guts of the language -- this book contains invaluable information.
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if you intend to write unsafe code -- or just want to dig into the guts of the
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language -- this book contains invaluable information.
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Unlike TRPL we will be assuming considerable prior knowledge. In particular, you
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should be comfortable with basic systems programming and basic Rust. If you
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Unlike [The Book][trpl] we will be assuming considerable prior knowledge. In
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don't feel comfortable with these topics, you should consider [reading
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particular, you should be comfortable with basic systems programming and Rust.
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TRPL][trpl], though we will not be assuming that you have. You can skip
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If you don't feel comfortable with these topics, you should consider [reading
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straight to this book if you want; just know that we won't be explaining
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The Book][trpl] first. Though we will not be assuming that you have, and will
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everything from the ground up.
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take care to occasionally give a refresher on the basics where appropriate. You
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can skip straight to this book if you want; just know that we won't be
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Due to the nature of advanced Rust programming, we will be spending a lot of
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explaining everything from the ground up.
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time talking about *safety* and *guarantees*. In particular, a significant
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portion of the book will be dedicated to correctly writing and understanding
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To be clear, this book goes into deep detail. We're going to dig into
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Unsafe Rust.
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exception-safety, pointer aliasing, memory models, and even some type-theory.
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We will also be spending a lot of time talking about the different kinds
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of safety and guarantees.
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[trpl]: ../book/
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[trpl]: ../book/
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