The Rust Programming Language

The Rust Programming Language — Pattern Matching — Type Parameters

Every coin has two sides — good and bad. Similarly, every programming language does have to deal with something that is defined and undefined or null. Rust particularly does not shine well when it comes to handling undefined or null. Rust will panic and start throwing an error when it comes across something that is undefined or null.

For these edge cases where things do go bad, Rust has given us Type Parameters and twoenum types, Option and Result. These two enum types are built into Rust language and can be used across the language and packages.

Option is used to handle the cases where there are chances or receiving undefined or null.

Result is used to handle the cases where there are chances getting Success and Error, for e.g. an asynchronous task.

Let’s see the definition of Option and Result in the below snippets:

enum Option<T> {
    None,
    Some(T),
}

enum Result<T, E> {
    Ok(T),
    Err(E),
}

Observations:

1. These enums Options and Result are part of the Rust Language itself.
2. It passes types using T inside the <> brackets, just like generics in TypeScript.
3. This T is known as Type…