Trait Stack 

pub trait Stack: Debug {
    type Error: Copy + Debug;

    // Required methods
    fn empty() -> Self;
    fn depth(&self) -> usize;
    fn peek(&self) -> Option<State>;
    fn pop(&mut self) -> Option<State>;
    fn push(&mut self, item: State) -> Result<(), Self::Error>;
}

A trait representing a stack.

Required Associated Types

type Error: Copy + Debug

This stack’s error type.

Required Methods

fn empty() -> Self

Create an empty stack.

fn depth(&self) -> usize

The current stack depth.

fn peek(&self) -> Option<State>

Peek at the current item on the stack.

fn pop(&mut self) -> Option<State>

Pop the next item from the stack.

fn push(&mut self, item: State) -> Result<(), Self::Error>

Push an item onto the stack.

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<const ONE_FOURTH_OF_MAX_DEPTH: usize> Stack for ConstStack<ONE_FOURTH_OF_MAX_DEPTH>

type Error = StackError