Trait StackTrait

pub trait StackTrait {
    // Required methods
    fn len(&self) -> usize;
    fn push(&mut self, value: U256) -> bool;
    fn popn<const N: usize>(&mut self) -> Option<[U256; N]>;
    fn popn_top<const POPN: usize>(
        &mut self,
    ) -> Option<([U256; POPN], &mut U256)>;
    fn exchange(&mut self, n: usize, m: usize) -> bool;
    fn dup(&mut self, n: usize) -> bool;

    // Provided methods
    fn is_empty(&self) -> bool { ... }
    fn push_b256(&mut self, value: B256) -> bool { ... }
    fn top(&mut self) -> Option<&mut U256> { ... }
    fn pop(&mut self) -> Option<U256> { ... }
    fn pop_address(&mut self) -> Option<Address> { ... }
}

Required Methods

fn len(&self) -> usize

Returns stack length.

fn push(&mut self, value: U256) -> bool

Pushes values to the stack Return true if push was successful, false if stack overflow.

Note

Error is internally set in interpreter.

fn popn<const N: usize>(&mut self) -> Option<[U256; N]>

Pop value from the stack.

fn popn_top<const POPN: usize>(&mut self) -> Option<([U256; POPN], &mut U256)>

Pop N values from the stack and return top value.

fn exchange(&mut self, n: usize, m: usize) -> bool

Exchange two values on the stack.

Indexes are based from the top of the stack.

Return true if swap was successful, false if stack underflow.

fn dup(&mut self, n: usize) -> bool

Duplicates the Nth value from the top of the stack.

Index is based from the top of the stack.

Return true if duplicate was successful, false if stack underflow.

Provided Methods

fn is_empty(&self) -> bool

Returns true if stack is empty.

fn push_b256(&mut self, value: B256) -> bool

fn top(&mut self) -> Option<&mut U256>

Return top value from the stack.

fn pop(&mut self) -> Option<U256>

Pop one value from the stack.

fn pop_address(&mut self) -> Option<Address>

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 StackTrait for Stack