Crate overloadable

This crate provides the ability to create overloadable functions in rust through the use of a macro.

Syntax:

use overloadable::overloadable;
overloadable!{
    pub function_name as
    #[doc = "Some meta attributes."]
    fn<OptionalTypeArgs>(function_params: function_types) -> optional_return_type where OptionalTypeArgs: constraints {
        code_body
    }
}

What is produced

Here is an example of the output produced by overloadable:

use overloadable::overloadable;
use std::fmt::Debug;
overloadable!{
    pub my_func as
    fn(x: usize, y: &str) -> f32 {
        (x * y.len()) as f32
    },
    fn<T>() where T: Debug {}
}
//Gives
#[allow(non_camel_case_types)]
pub struct my_func_;
impl Fn<(usize, &str,)> for my_func {
    extern "rust-call" fn call(&self, (x, y,): (usize, &str,)) -> f32 {
        {
            (x * y.len()) as f32
        }
    }
}
//The rest of the `Fn*` family
impl<T> Fn<()> for my_func where T: Debug {
    extern "rust-call" fn call(&self, (): ()) -> () {
        {}
    }
}
//The rest of the `Fn*` family.

Note that you cannot have functions with unused generic parameters due to the trait-implementing nature of this method.

Macros

overloadable	Overloadable function macro. Please read the top level documentation for this crate for more information on this.
overloadable_member	Overloadable function macro for members. This allows you to have overloadable methods and associated functions.