core::default::default - Rust
Description: API documentation for the Rust `default` fn in crate `core`.
Keywords: rust, rustlang, rust-lang, default

# [−][src]Function core::default::default

    pub fn default<T: Default>() -> T

🔬 This is a nightly-only experimental API. (`default_free_fn` #73014)

Return the default value of a type according to the `Default` trait.

The type to return is inferred from context; this is equivalent to `Default::default()` but shorter to type.

For example:

    #![feature(default_free_fn)]

    use std::default::default;

    #[derive(Default)]
    struct AppConfig {
        foo: FooConfig,
        bar: BarConfig,
    }

    #[derive(Default)]
    struct FooConfig {
        foo: i32,
    }

    #[derive(Default)]
    struct BarConfig {
        bar: f32,
        baz: u8,
    }

    fn main() {
        let options = AppConfig {
            foo: default(),
            bar: BarConfig {
                bar: 10.1,
                ..default()
            },
        };
    }

Run