Rust (programming language): Difference between revisions

Retrieved from "https://wiki.davidl.me/view/Rust_(programming_language)"

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-Rust is a low-level programming language. It's main advantage is supposed to be memory safety by default.
+Rust is a low-level programming language.
-Recently, Rust has been adopted to many systems applications such as the Linux kernel drivers and Android.
+The main advantage is that it encourages memory-safe programming through reference ownership and by isolating memory-unsafe functions.
 ==Usage==
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 </pre>
+==Syntax==
+===Basics===
+<syntaxhighlight lang="rust">
+// Const variable, must have type annotation.
+const IMPORTANT_VALUE: i32 = 50;
+fn main() {
+  // C++: int x = 3;
+  let mut x: i32 = 3;
+  // Shadowing, creating a new variable.
+  let x = x + 5;
+  // Loop over values [0, 1, 2]
+  for i in 0..3 {
+    println!("This number is {}", i);
+  }
+  // Ternary is a single line if statement.
+  let big_x = if x > 5 {x} else {5};
+}
+fn lerp(a: f64, b: f64, x: f64) -> f64 {
+   // No semicolon implies return.
+  (1.0 - x) * a + x * b
+}
+// Copied from rustlings.
+pub fn fizz_if_foo(fizzish: &str) -> &str {
+    if fizzish == "fizz" {
+        "foo"
+    } else if fizzish == "fuzz" {
+        "bar"
+    } else {
+        "baz"
+    }
+}
+</syntaxhighlight>
+===Borrowing===
+This is like references or <code>unique_ptr</code> in C++.
+<syntaxhighlight lang="rust">
+let x = 5;
+let mut y = 6;
+// C++: const int &
+example_borrow(&x)
+// C++: int&
+example_mut_borrow(&mut y)
+</syntaxhighlight>
 ==Resources==
 * [https://github.com/rust-lang/rustlings/ Rustlings] - some rust exercises.
+* [https://doc.rust-lang.org/book/print.html The Rust Programming Language]
+* [https://doc.rust-lang.org/stable/rust-by-example/index.html Rust by example book]