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FoldWithOption

buoyant_kernel::utils

Trait FoldWithOption 

Source 
pub trait FoldWithOption: Sized {
    // Required method
    fn fold_with<U>(
        self,
        opt: Option<U>,
        f: impl FnOnce(Self, U) -> Self,
    ) -> Self;
}
Available on crate feature internal-api only.
Expand description

Extension trait for folding zero or one value from an Option into a base value.

Required Methods§

Source

fn fold_with<U>(self, opt: Option<U>, f: impl FnOnce(Self, U) -> Self) -> Self

Applies an optional fold operation f to self if opt is Some; otherwise returns self.

Similar to opt.iter().fold(self, |acc, value| f(acc, value)), but accepting FnOnce instead of requiring FnMut, and with the base value as receiver instead of the option.

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors§