Struct ethereumvm::Stack

pub struct Stack { /* fields omitted */ }

Represents an EVM stack.

Methods

impl Stack

pub fn check_pop_push(
    &self,
    pop: usize,
    push: usize
) -> Result<(), OnChainError>

Check a pop-push cycle. If the check succeeded, push, pop, set, peek within the limit should not fail.

pub fn push(&mut self, elem: M256) -> Result<(), OnChainError>

Push a new value to the stack.

pub fn pop(&mut self) -> Result<M256, OnChainError>

Pop a value from the stack.

pub fn set(&mut self, no_from_top: usize, val: M256) -> Result<(), OnChainError>

Set a value at given index for the stack, where the top of the stack is at index 0. If the index is too large, StackError::Underflow is returned.

pub fn peek(&self, no_from_top: usize) -> Result<M256, OnChainError>

Peek a value at given index for the stack, where the top of the stack is at index 0. If the index is too large, StackError::Underflow is returned.

pub fn len(&self) -> usize

Get the current stack length.

pub fn is_empty(&self) -> bool

Returns true if stack is empty

Trait Implementations

impl Default for Stack

fn default() -> Stack

Returns the "default value" for a type.

impl Debug for Stack

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.