aoc-toolbox-derive 0.4.1

Macros implementation of aoc-toolbox
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# csv-export

## About

Advent of code tools.

## Installation

Import the following packages in your crate:

```toml
aoc-toolbox = "0.4"
```

## Usage

### Main generation

You can mark solvers in your code:

```rust
use aoc_toolbox::aoc_solver;

#[aoc_solver("day01", "part1")]
fn solve_day01_part1(input: String) -> String {
    // ...
}
```

And then at the end of your `main.rs`, you can call this macro:

```rust
use aoc_toolbox::aoc_main;

aoc_main!(2021);
```

## Limitations

- For the moment, macros do not have context. Their state is not saved between calls
  (see [this issue](https://github.com/rust-lang/rust/issues/44034)).
  I use a hack to save an internal state, so problems can appear...
- Each solver must have the following signature:
    ```rust
    fn (input: String) -> String;
    ```

## Motivation

This tool was intended for my purpose only.

I choosed to release it, so anyone can use it. Enjoy!