Trait AccessorTrait 

pub trait AccessorTrait<Root, Value, MutRoot, MutValue>: Readable<Root, Value> + Writable<MutRoot, MutValue> {
    // Provided 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 { ... }
}

Optional-root and fallback helpers built on Readable / Writable.

Provided Methods

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

Like Readable::get, but takes an optional root.

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

Like Writable::set, but takes an optional root.

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.

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.

Dyn Compatibility

This trait is not dyn compatible.

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

Implementors

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