default_kwargs 0.1.0

The macro wich enables you to use default and keyword arguments in Rust
Documentation 
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#![warn(clippy::all, clippy::pedantic, clippy::nursery, rustdoc::all)]

use default_kwargs::{default_args, keyword_args};

default_args! {
    fn generic<T>(t: T = T::default()) -> Option<T>
    where T: Default,
    {
        Some(t)
    }
}

fn main() {
    match keyword_args! { generic::<i32>() } {
        Some(thing) => assert_eq!(thing, 0),
        None => panic!("something is wrong..."),
    };

    match keyword_args! { generic(t = 42) } {
        Some(thing) => assert_eq!(thing, 42),
        None => panic!("something is wrong..."),
    };
}