nekoprint 0.1.2

nekoprint is a powerful procedural macro for Rust that automatically generates printing methods for a struct's fields and the entire struct itself. It lets you create fluid, asynchronous logs with different severity levels using a simple, chained syntax. This library is ideal for debugging, monitoring, and diagnostics in Rust applications, especially those using async/await.
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# `nekoprint`

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**`nekoprint`** is a powerful procedural macro for Rust that automatically generates printing methods for a struct's fields and the entire struct itself. It lets you create fluid, asynchronous logs with different severity levels using a simple, chained syntax.

This library is ideal for **debugging**, **monitoring**, and **diagnostics** in Rust applications, especially those using `async/await`.

-----

## ✨ Features

  - **Automatic Generation**: Creates methods like `print_field()` and `print()` for every decorated struct.
  - **Customizable Transporters**: Define your own message transport logic using the `#[transporter]` attribute.
  - **Integrated Log Levels**: Built-in support for the following fluid log levels:
      - `.err()`
      - `.info()`
      - `.success()`
      - `.warning()`
      - `.critical()`
      - `.panic()`
      - `.rust()` (useful for standard debug logs)
  - **Personalized Messages**: Add specific log messages to each call with the `.message()` method.
  - **`async/await` Compatible**: Fully integrated with the `tokio` ecosystem.

-----

## ⚙️ Installation

Add `nekoprint` to your `Cargo.toml`:

```bash
cargo add nekoprint
```

> Make sure the `nekoprint` macro is in scope.

-----

## 🚀 Usage

### Defining Your Struct

Decorate your struct with `#[derive(NekoPrint)]` and use the `#[transporter]` attribute to define how the log message will be processed. The transporter is an `async` function that takes a `message` variable (a `CString`).

```rust
use nekoprint::NekoPrint;

#[derive(Debug, NekoPrint, Default, Clone)]
#[transporter(async fn procedure() {
    println!("{message}");
    let m = message.to_string();
    assert!(
        m.contains("message")
    );
})]
pub struct User {
    id: i32,
    name: String,
    friend: Friend,
}

#[derive(Debug, NekoPrint, Default, Clone)]
#[transporter(async fn procedure() {
    println!("{message}");
    let m = message.to_string();
    assert!(
        m.contains("message")
    );
})]
pub struct Friend {
    id: i32,
    name: String,
}
```

### Full Usage Example

The `NekoPrint` macro generates methods like `print_id()`, `print_name()`, and `print()` for the `User` and `Friend` structs. You can then chain the `.message()` and `.level()` methods to customize the output.

```rust
#[tokio::test]
async fn test_print_user() {
    let user = User {
        id: 1,
        name: "name".into(),
        friend: Friend {
            id: 1,
            name: "name".into(),
        },
    };

    // Print the `id` field with different log levels
    user.print_id().message("custom message for id").err().await;
    user.print_id().message("info id message").info().await;
    user.print_id().message("success id message").success().await;
    user.print_id().message("warning id message").warning().await;
    user.print_id().message("critical id message").critical().await;
    user.print_id().message("panic id message").panic().await;
    user.print_id().message("rust debug id message").rust().await;

    // Print the `name` field with different log levels
    user.print_name().message("custom message for name").err().await;
    user.print_name().message("info name message").info().await;
    user.print_name().message("success name message").success().await;
    user.print_name().message("warning name message").warning().await;
    user.print_name().message("critical name message").critical().await;
    user.print_name().message("panic name message").panic().await;
    user.print_name().message("rust debug name message").rust().await;

    // Print the entire struct with different log levels
    user.print().message("custom message for all").err().await;
    user.print().message("custom message for all").info().await;
    user.print().message("custom message for all").success().await;
    user.print().message("custom message for all").warning().await;
    user.print().message("custom message for all").panic().await;
    user.print().message("custom message for all").critical().await;
    user.print().message("custom message for all").rust().await;
}
```

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