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#[cfg(feature = "use_core")]
extern crate core;
#[macro_use]
extern crate derivative;
#[derive(Debug, Derivative, PartialEq)]
#[derivative(Default="new")]
struct Foo<T, U> {
foo: T,
#[derivative(Default(value="min()", bound="U: std::ops::Not<Output=U>, U: Default"))]
bar: U,
}
#[derive(Debug, Derivative, PartialEq)]
#[derivative(Default(bound="T: Default, U: std::ops::Not<Output=U>, U: Default", new="true"))]
struct Bar<T, U> {
foo: T,
#[derivative(Default(value="min()"))]
bar: U,
}
fn min<T: Default + std::ops::Not<Output=T>>() -> T {
!T::default()
}
#[derive(Debug, Derivative, PartialEq)]
#[derivative(Default(bound=""))]
struct WithOption<T> {
foo: Option<T>,
}
struct NonDefault;
#[test]
fn main() {
assert_eq!(Foo::default(), Foo { foo: 0u8, bar: 0xffu8 });
assert_eq!(Bar::default(), Bar { foo: 0u8, bar: 0xffu8 });
assert_eq!(Foo::new(), Foo { foo: 0u8, bar: 0xffu8 });
assert_eq!(Bar::new(), Bar { foo: 0u8, bar: 0xffu8 });
WithOption::<NonDefault>::default();
}
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