cursive_core/
with.rs

1/// Generic trait to enable chainable API
2pub trait With: Sized {
3    /// Calls the given closure and return the result.
4    ///
5    /// Used to chainify wrapper constructors.
6    fn wrap_with<U, F: FnOnce(Self) -> U>(self, f: F) -> U {
7        f(self)
8    }
9
10    /// Calls the given closure on `self`.
11    #[must_use]
12    fn with<F: FnOnce(&mut Self)>(mut self, f: F) -> Self {
13        f(&mut self);
14        self
15    }
16
17    /// Calls the given closure on `self`.
18    fn try_with<E, F>(mut self, f: F) -> Result<Self, E>
19    where
20        F: FnOnce(&mut Self) -> Result<(), E>,
21    {
22        f(&mut self)?;
23        Ok(self)
24    }
25
26    /// Calls the given closure if `condition == true`.
27    #[must_use]
28    fn with_if<F>(mut self, condition: bool, f: F) -> Self
29    where
30        F: FnOnce(&mut Self),
31    {
32        if condition {
33            f(&mut self);
34        }
35        self
36    }
37}
38
39impl<T: Sized> With for T {}
cursive_core/with.rs

cursive_core/
with.rs
