Struct ExecutionStack 

pub struct ExecutionStack { /* private fields */ }

Implementations

impl ExecutionStack

pub fn new(items: Vec<StackItem>) -> Self

Return a new ExecutionStack using the vector of StackItem in items

pub fn size(&self) -> usize

Returns the number of entries in the execution stack

pub fn peek(&self) -> Option<&StackItem>

Returns a reference to the top entry in the stack without affecting the stack

pub fn is_empty(&self) -> bool

Returns true if the stack is empty

pub fn pop(&mut self) -> Option<StackItem>

Pops the top item in the stack. If the stack is not empty, pop returns the item, otherwise return None if it is empty.

pub fn pop_into_number<T: TryFrom<i64>>(&mut self) -> Result<T, ScriptError>

Pops the top item in the stack and applies TryFrom for the given generic type. If the stack is not empty, and is a StackItem::Number, pop_into_number returns the parsed number. Returns an error if the stack is empty or if the top item is a different variant.

pub fn pop_n_plus_one_contains(&mut self, n: u8) -> Result<bool, ScriptError>

Pops n + 1 items from the stack. Checks if the last popped item matches any of the first n items. Returns an error if all n + 1 items aren’t of the same variant, or if there are not n + 1 items on the stack.

pub fn pop_num_items( &mut self, num_items: usize, ) -> Result<Vec<StackItem>, ScriptError>

Pops the top n items in the stack. If the stack has at least n items, pop_num_items returns the items in stack order (ie. bottom first), otherwise returns an error.

pub fn to_bytes(&self) -> Vec<u8>

Return a binary array representation of the input stack

pub fn from_bytes(bytes: &[u8]) -> Result<Self, ScriptError>

pub fn push(&mut self, item: StackItem) -> Result<(), ScriptError>

Pushes the item onto the top of the stack. This function will only error if the new stack size exceeds the maximum allowed stack size, given by [MAX_STACK_SIZE]

Trait Implementations

impl BorshDeserialize for ExecutionStack

fn deserialize_reader<R>(reader: &mut R) -> Result<Self, Error>

where R: Read,

fn deserialize(buf: &mut &[u8]) -> Result<Self, Error>

Deserializes this instance from a given slice of bytes. Updates the buffer to point at the remaining bytes.

fn try_from_slice(v: &[u8]) -> Result<Self, Error>

Deserialize this instance from a slice of bytes.

fn try_from_reader<R>(reader: &mut R) -> Result<Self, Error>

where R: Read,

impl BorshSerialize for ExecutionStack

fn serialize<W: Write>(&self, writer: &mut W) -> Result<()>

impl Clone for ExecutionStack

fn clone(&self) -> ExecutionStack

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ExecutionStack

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

Formats the value using the given formatter.

impl Default for ExecutionStack

fn default() -> ExecutionStack

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ExecutionStack

fn deserialize<D>(de: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hex for ExecutionStack

fn from_hex(hex: &str) -> Result<Self, HexError>

where Self: Sized,

Try to convert the given hexadecimal string to the type.

fn to_hex(&self) -> String

Return the hexadecimal string representation of the type.

impl PartialEq for ExecutionStack

fn eq(&self, other: &ExecutionStack) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for ExecutionStack

fn serialize<S>(&self, ser: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for ExecutionStack

impl StructuralPartialEq for ExecutionStack