Rust Doc Comment

Rust doc comment

Created By: chatGPT

In Rust, documentation comments are special comments that are used to generate documentation for your code. They start with three slashes (///) for documentation comments or two slashes (//) for line comments. Documentation comments can be used to describe the purpose of structs, enums, functions, and modules.

// Example of a simple function documentation
/// This function adds two integers together.
///
/// # Examples
///
/// 
/// let result = add(2, 3);
/// assert_eq!(result, 5);
/// 
fn add(a: i32, b: i32) -> i32 {
    a + b
}

For more detailed documentation, /// can also be used for larger blocks including markdown syntax. You can include sections, links, code snippets, and lists within your comments. This is useful for maintaining clarity and providing additional context.

/// A struct that represents a **Rectangle**.
///
/// # Fields
///
/// * `width`: The width of the rectangle.
/// * `height`: The height of the rectangle.
struct Rectangle {
    width: f64,
    height: f64,
}

You can use //! to add documentation at the crate level, which is usually placed at the top of your file. This style of documentation can detail what the entire library does, so you could add a comprehensive description and include any usage examples relevant to the entire package.

//! This crate provides utilities for handling **shapes**.
//!
//! The utilities include calculations for area, perimeter,
//! and other geometrical properties.

When you generate documentation with cargo doc, Rust's documentation tool will read these comments and create a browsable output. This is an effective way to ensure that anyone using your library or module can understand how to use it with minimal effort.

/// Returns the area of the rectangle.
///
/// # Examples
///
/// 
/// let rect = Rectangle { width: 5.0, height: 10.0 };
/// let area = rect.area();
/// assert_eq!(area, 50.0);
/// 
impl Rectangle {
    fn area(&self) -> f64 {
        self.width * self.height
    }
}

In summary, proper usage of doc comments can greatly enhance the usability and maintainability of your code by providing clear and informative guidance to users. Always strive to keep your documentation up-to-date alongside any changes in the implementation.

/// Prints the details of the rectangle.
///
/// Displays the width and height of the rectangle in a formatted fashion.
impl Rectangle {
    fn print_details(&self) {
        println!("Width: {}, Height: {}", self.width, self.height);
    }
}