From 64d95837e9813541cf5b357de13865ce687ae98d Mon Sep 17 00:00:00 2001 From: Adam Brewer Date: Mon, 16 Oct 2023 07:37:12 -0400 Subject: Update Exercises Directory Names to Reflect Order --- exercises/23_conversions/README.md | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 exercises/23_conversions/README.md (limited to 'exercises/23_conversions/README.md') diff --git a/exercises/23_conversions/README.md b/exercises/23_conversions/README.md new file mode 100644 index 0000000..619a78c --- /dev/null +++ b/exercises/23_conversions/README.md @@ -0,0 +1,23 @@ +# Type conversions + +Rust offers a multitude of ways to convert a value of a given type into another type. + +The simplest form of type conversion is a type cast expression. It is denoted with the binary operator `as`. For instance, `println!("{}", 1 + 1.0);` would not compile, since `1` is an integer while `1.0` is a float. However, `println!("{}", 1 as f32 + 1.0)` should compile. The exercise [`using_as`](using_as.rs) tries to cover this. + +Rust also offers traits that facilitate type conversions upon implementation. These traits can be found under the [`convert`](https://doc.rust-lang.org/std/convert/index.html) module. +The traits are the following: + +- `From` and `Into` covered in [`from_into`](from_into.rs) +- `TryFrom` and `TryInto` covered in [`try_from_into`](try_from_into.rs) +- `AsRef` and `AsMut` covered in [`as_ref_mut`](as_ref_mut.rs) + +Furthermore, the `std::str` module offers a trait called [`FromStr`](https://doc.rust-lang.org/std/str/trait.FromStr.html) which helps with converting strings into target types via the `parse` method on strings. If properly implemented for a given type `Person`, then `let p: Person = "Mark,20".parse().unwrap()` should both compile and run without panicking. + +These should be the main ways ***within the standard library*** to convert data into your desired types. + +## Further information + +These are not directly covered in the book, but the standard library has a great documentation for it. + +- [conversions](https://doc.rust-lang.org/std/convert/index.html) +- [`FromStr` trait](https://doc.rust-lang.org/std/str/trait.FromStr.html) -- cgit v1.2.3