Trait AccessorTrait 

pub trait AccessorTrait<R, V, Root, Value, MutRoot, MutValue, G, S> {
    // Required methods
    fn get_optional(&self, root: Option<Root>) -> Option<Value>;
    fn get_mut_optional(&self, root: Option<MutRoot>) -> Option<MutValue>;
    fn get_or_else<F>(&self, root: Root, f: F) -> Value
       where F: FnOnce() -> Value;
    fn get_mut_or_else<F>(&self, root: MutRoot, f: F) -> MutValue
       where F: FnOnce() -> MutValue;
}

Required Methods

fn get_optional(&self, root: Option<Root>) -> Option<Value>

Like get, but takes an optional root: returns None if root is None, otherwise the result of the getter.

fn get_mut_optional(&self, root: Option<MutRoot>) -> Option<MutValue>

Like get_mut, but takes an optional root: returns None if root is None, otherwise the result of the setter.

fn get_or_else<F>(&self, root: Root, f: F) -> Value

where F: FnOnce() -> Value,

Returns the value if the keypath succeeds, otherwise calls f and returns its result.

fn get_mut_or_else<F>(&self, root: MutRoot, f: F) -> MutValue

where F: FnOnce() -> MutValue,

Returns the mutable value if the keypath succeeds, otherwise calls f and returns its result.

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.

Implementors

impl<R, V, Root, Value, MutRoot, MutValue, G, S> AccessorTrait<R, V, Root, Value, MutRoot, MutValue, G, S> for Kp<R, V, Root, Value, MutRoot, MutValue, G, S>

where Root: Borrow<R>, Value: Borrow<V>, MutRoot: BorrowMut<R>, MutValue: BorrowMut<V>, G: Fn(Root) -> Option<Value>, S: Fn(MutRoot) -> Option<MutValue>,