base_traits/traits/
is_default.rs

1// src/traits/is_default.rs : `IsDefault`
2
3/// Trait defining instance method `is_default() : bool` that allows a type
4/// instance to indicate whether it holds the "default" value.
5pub trait IsDefault {
6	fn is_default(&self) -> bool;
7}
8
9
10#[cfg(all(not(test), not(feature = "nostd")))]
11impl<T : IsDefault + ?Sized> IsDefault for Box<T> {
12    fn is_default(&self) -> bool {
13        (**self).is_default()
14    }
15}
16
17#[cfg(all(not(test), not(feature = "nostd")))]
18impl<T : IsDefault + ?Sized> IsDefault for std::rc::Rc<T> {
19    fn is_default(&self) -> bool {
20        (**self).is_default()
21    }
22}
23
24
25// ///////////////////////////// end of file //////////////////////////// //
26