Crate afmt

This crate provides the fmt attribute macro, its usage is simple:

#[macro_use] extern crate afmt;

#[fmt("value: " v)]
struct Foo {
    v: u32,   
}

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let f: Foo = "value: 65".parse()?;
    assert_eq!(f.v, 65);

    let f: Result<Foo,_> = "val: 65".parse();
    assert!(f.is_err());
    Ok(())
}

Attribute Macros

fmt