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In Rust, a unit struct is a type of struct that doesn't have any fields. It is essentially a "marker" or "tag" type and is represented by an empty pair of curly braces (struct Name;).

Unit structs are particularly useful in scenarios where you need to define types without associated data. Here's an example:

pub struct Database;

Your Task

In this challenge, you'll implement a unit struct named Logger. The struct will serve as a type marker that enables certain logging functionality via a method log_message. You'll also implement a log_message function that prints a message to the console using the unit struct Logger as a marker. The goal is to familiarize yourself with unit structs and their usage as markers.

Requirements

  1. Define a unit struct named Logger.

  2. Implement a Logger::log_message method that:

    • Takes a &str message as input.
    • Prints the message to the console in the format: [LOG]: {message}.

  3. Use the unit struct Logger to call this method.

Example Test

Logger::log_message("This is a test log.");
// Output: [LOG]: This is a test log.

Hints

<details> <summary>Click here to reveal hints</summary>
  • Define the unit struct as pub struct Logger;.
  • Implement an associated function for the unit struct using the impl Logger block.
  • Use the println! macro to format and print the message.
  • Remember, unit structs do not require any fields and are defined with empty braces.
</details>
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// Define a struct named `Logger`
// Implement an associated function `log_message`
// That accepts a `&str` and prints the output.


// Example usage:
pub fn main() {
    Logger::log_message("Hello, World!");
}