summaryrefslogtreecommitdiff
path: root/exercises/23_conversions/README.md
diff options
context:
space:
mode:
authorAdam Brewer <adamhb321@gmail.com>2023-10-16 07:37:12 -0400
committerAdam Brewer <adamhb321@gmail.com>2023-10-16 07:37:12 -0400
commit64d95837e9813541cf5b357de13865ce687ae98d (patch)
treef022c5d5ba01128811c0b77618a7adb843ee876b /exercises/23_conversions/README.md
parentc3941323e2c0b9ee286494327de92e00f23b9e3a (diff)
Update Exercises Directory Names to Reflect Order
Diffstat (limited to 'exercises/23_conversions/README.md')
-rw-r--r--exercises/23_conversions/README.md23
1 files changed, 23 insertions, 0 deletions
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)