3 unstable releases

0.2.1 Apr 25, 2020
0.2.0 Apr 25, 2020
0.1.0 Feb 8, 2019

#1915 in Rust patterns


Used in git-remote-k8s

MIT license

4KB
71 lines

default! macro for Rust

Sometimes you want to create nested structures, set values for some the fields and use default value for most of the other, for example:

use default_macro::default;

#[derive(Default)]
struct Window { title: &str, border: Border, /* 10 other fields */ }

#[derive(Default)]
struct Border { width: f64, /* 5 other fields*/ }

fn foo() {
    let w1 = Window { 
        title: "Test", 
        border: Border {  
            width: 10.0, 
            ..Border::Default}, 
        ..Window::default()
    };

    // with the macros:
    let w2 = default!( Window { 
        title: "Test", 
        border: Border {  width: 10.0} 
    });
}

No runtime deps