Trait OptionDatumExt 

pub trait OptionDatumExt<T> {
    // Required methods
    fn replace_if_none_or_older_than(
        &mut self,
        maybe_replace_with: Datum<T>,
    ) -> bool;
    fn replace_if_none_or_older_than_option(
        &mut self,
        maybe_replace_with: Self,
    ) -> bool;
}

Extension trait for Option<Datum<T>>.

Required Methods

fn replace_if_none_or_older_than( &mut self, maybe_replace_with: Datum<T>, ) -> bool

If self is None, replaces it with Some(maybe_replace_with). If self is Some, replaces it with Some(maybe_replace_with) if maybe_replace_with’s timestamp is newer than its. Returns true if self was replaced and false otherwise.

fn replace_if_none_or_older_than_option( &mut self, maybe_replace_with: Self, ) -> bool

If maybe_replace_with is Some, calls replace_if_none_or_older_than. If it is None, returns false immediately.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<T> OptionDatumExt<T> for Option<Datum<T>>

fn replace_if_none_or_older_than( &mut self, maybe_replace_with: Datum<T>, ) -> bool

fn replace_if_none_or_older_than_option( &mut self, maybe_replace_with: Self, ) -> bool

Implementors