Attribute Macro phantom

#[phantom]

Provides an automatic PhantomData field for a struct based on its generic types.

This macro simplifies the addition of a PhantomData field to a struct to indicate that the struct logically owns instances of the generic types, even though it does not store them.

Example Usage

Instead of manually adding PhantomData<T> to MyStruct:

use std::marker::PhantomData;

pub struct MyStruct<T>
{
    data: i32,
    _phantom: PhantomData<T>,
}

Use #[ phantom ] to automatically generate the PhantomData field:

use derive_tools_meta::*;

#[ phantom ]
pub struct MyStruct< T >
{
    data: i32,
}

The macro facilitates the addition of the PhantomData field without additional boilerplate code.