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405 lines
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<title>Rust Em 10 Minutos</title> |
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<meta name="description" content="Por que você deveria aprender Rust"> |
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<meta name="author" content="Julio Biason"> |
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</head> |
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<body> |
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<div class="reveal"> |
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<div class="slides"> |
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<section data-background="_images/rust-evangelism.jpg" data-header> |
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<h2 class="semi-opaque">Rust Em 10 Minutos</h2> |
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</section> |
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<section> |
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<h2> |
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História |
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<img src="_images/rust-ferris.png" alt="" style="width:100px;margin:0"> |
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</h2> |
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<ul> |
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<li>Criada em 2006 por Graydon Hoare.</li> |
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<li>Patrocinada pela Mozilla em 2009.</li> |
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<li>Versão 1.0 em 2015.</li> |
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<li>Versão atual: 1.72</li> |
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<li class="fragment">Edition: 2021</li> |
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</ul> |
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<aside class="notes"> |
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Parte burocrática da apresentação. |
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PS: Pode ser que, quando você essa apresentação, 1.70 |
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não seja mais a versão atual; a cada 6 semanas, sai uma |
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nova versão do compilador. |
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</aside> |
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</section> |
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<section> |
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<img class="stretch" src="_images/40-years-processor-trend.png" alt=""> |
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</section> |
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<section> |
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<img class="stretch" src="_images/moores-law-2020.png"> |
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</section> |
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<section> |
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<p><a href="https://www.zdnet.com/article/microsoft-70-percent-of-all-security-bugs-are-memory-safety-issues/">Microsoft: 70 percent of all security bugs are memory safety issues</a></p> |
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<p>(2019)</p> |
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</section> |
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<section> |
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<img src="_images/rust-fearless-concurrency.png"/> |
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</section> |
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<section> |
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<img src="_images/rust-blazingly-fast.png"/> |
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</section> |
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<section> |
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<h2>Green Energy Language</h2> |
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<img src="_images/rust-energy-full.png" alt=""> |
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<aside class="notes"> |
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Num estudo sobre quais linguagens consomem mais |
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energia, Rust chegou bem próximo de C. |
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Parte do trabalho de otimização do Rust vem da LLVM |
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(parte do pacote do Clang), mas a árvore de |
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abstração ainda é gerada pela linguagem -- o que |
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significa que o compilador Rust consegue "ajudar" o |
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LLVM a otimizar o código. |
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</aside> |
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</section> |
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<section> |
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<p> |
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"Speaking of languages, it's time to halt starting any new |
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projects in C/C++ and use Rust for those scenarios |
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where a non-GC language is required. For the sake of |
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security and reliability. the industry should declare |
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those languages as deprecated" |
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</p> |
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<p> |
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- <a href="https://www.zdnet.com/article/programming-languages-its-time-to-stop-using-c-and-c-for-new-projects-says-microsoft-azure-cto/">Mark Russinovich, Azure CTO</a>, 2022 |
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</p> |
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</section> |
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<section> |
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<img src="_images/how.gif"/> |
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</section> |
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<section> |
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<h2>Borrow Checker</h2> |
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<h3 class="fragment">(and lifetimes)</h3> |
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<h2 class="fragment">+ Good Syntax</h2> |
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<h2 class="fragment">+ Helpful Errors</h2> |
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</section> |
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<section> |
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<pre><code> |
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fn main() { |
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let hello = String::from("Hello!"); |
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{ |
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let world = String::from("World!"); |
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println!("{hello} {world}"); |
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} |
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println!("{hello} {world}"); |
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} |
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</code></pre> |
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</section> |
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<section> |
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<pre><code> |
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fn i_own_this_now(s: String) { |
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println!("Hello {s}!") |
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} |
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fn main() { |
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let name = String::from("Julio"); |
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i_own_this_now(name); |
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println!("Goodbye {name}"); |
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} |
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</code></pre> |
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</section> |
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<section> |
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<pre><code> |
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fn can_i_borrow_it_for_a_second(s: &str) { |
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println!("Hello {s}"); |
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} |
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fn main() { |
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let name = String::from("Julio"); |
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can_i_borrow_it_for_a_second(&name); |
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println!("Goodbye {name}"); |
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} |
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</code></pre> |
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</section> |
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<section> |
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<pre><code> |
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func foo() { |
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regalo := Gift { .. } |
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channel <- regalo |
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regalo.open(); |
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} |
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</code></pre> |
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<small class="fragment"> |
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(<a href="https://nikomatsakis.github.io/rust-latam-2019/#29"> |
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Niko Matsakis, RustLatam 2019 |
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</a>) |
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</small> |
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</section> |
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<section> |
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<img src="_images/rust-languages.png" class="stretch"> |
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<small class="fragment"> |
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(<a href="https://nikomatsakis.github.io/rust-latam-2019/#29"> |
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Niko Matsakis, RustLatam 2019 |
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</a>) |
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</small> |
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</section> |
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<section> |
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<h2>Good Syntax</h2> |
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<p> |
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StackOverflow Survey 2023: "Most Admired Language" <span class="fragment">(84.6%)</span> |
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</p> |
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<p class="fragment"> |
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... pelo 8<sup>o</sup> ano seguido. |
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</p> |
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</section> |
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<section> |
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<h2>Helpful Errors</h2> |
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<pre><code class="hljs rust" data-trim> |
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fn main() { |
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let a = 2; |
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a = 3; |
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println!("{}", a); |
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} |
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</code></pre> |
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<aside class="notes"> |
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Primeiro contato com Rust: assim como C, tem uma |
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função `main`, que pode retornar um inteiro; para |
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atribuir variáveis, usa-se `let`. |
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Uma coisa: Rust é "strong and statically typed", o |
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que sigifnica que a linguagem tem tipos, mas por |
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padrão o compilador tenta inferir o tipo. |
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Uma outra forma de escrever o let seria: |
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``` |
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let a: u8 = 2; |
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``` |
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</aside> |
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</section> |
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<section> |
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<h2>Helpful Errors</h2> |
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<pre><code class="hljs" data-trim> |
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3 | let a = 2; |
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| - |
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| | |
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| first assignment to `a` |
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| help: make this binding mutable: `mut a` |
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4 | a = 3; |
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| ^^^^^ cannot assign twice to immutable variable |
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</code></pre> |
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<aside class="notes"> |
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Se você tentar mudar um dado depois de criado, o |
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compilador Rust não vai deixar. |
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</aside> |
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</section> |
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<section> |
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<h2>Helpful Errors</h2> |
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<pre><code class="hljs" data-trim data-line-numbers="7"> |
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3 | let a = 2; |
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| - |
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| | |
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| first assignment to `a` |
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| help: make this binding mutable: `mut a` |
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4 | a = 3; |
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| ^^^^^ cannot assign twice to immutable variable |
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</code></pre> |
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<aside class="notes"> |
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... mas se tu olhar com calma, tu vai ver que não só o |
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compilador disse, claramente, o que era o problema... |
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</aside> |
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</section> |
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<section data-transition="fade"> |
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<h2>Helpful Errors</h2> |
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<pre><code class="hljs" data-trim data-line-numbers="5"> |
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3 | let a = 2; |
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| - |
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| | |
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| first assignment to `a` |
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| help: make this binding mutable: `mut a` |
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4 | a = 3; |
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| ^^^^^ cannot assign twice to immutable variable |
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</code></pre> |
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<aside class="notes"> |
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... como também vai dizer como resolver o problema. |
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</aside> |
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</section> |
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<section> |
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<img src="_images/around-world.jpg" class="stretch"> |
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</section> |
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<section> |
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<h2>Cargo</h2> |
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<ul> |
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<li class="fragment">Dependency manager</li> |
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<li class="fragment">Build tool</li> |
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<li class="fragment">Test manager</li> |
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<li class="fragment">Distributable packages</li> |
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<li class="fragment">Uploader to the registry (crates.io)</li> |
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</ul> |
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</section> |
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<section> |
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<h2>Crates.io</h2> |
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<p>"124,474 Crates in stock"</p> |
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<p class="fragment"> |
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PyPI: "479,236 projects" |
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<p class="fragment">20 years vs 8</p> |
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</p> |
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</section> |
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<section> |
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<p> |
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<span class="fragment"><a href="https://serde.rs/">Serde</a></span> |
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<span class="fragment" style="float:right"><a href="http://pest.rs/book/">Pest</a></span> |
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<span class="fragment" style="float:left"><a href="https://ratatui-org.github.io/ratatui-book/index.html">Ratatui</a></span> |
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</p> |
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<h2><a href="https://doc.rust-lang.org/book/">The Rust Book</a></h2> |
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<p> |
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<span class="fragment"><a href="https://tokio.rs/tokio/tutorial">Tokio</a></span> |
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<span class="fragment" style="float:left"><a href="https://book.async.rs/">Async-Std</a></span> |
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<span class="fragment" style="float:right"><a href="https://actix.rs/docs/">Actix</a></span> |
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</p> |
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</section> |
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<section data-background='_images/thats-all-folks.jpg'> |
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</section> |
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</div> |
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