Struct solana_sdk::sysvar::slot_hashes::SlotHashes

#[repr(C)]
pub struct SlotHashes(_);

Implementations

impl SlotHashes

pub fn add(&mut self, slot: u64, hash: Hash)

pub fn get(&self, slot: &u64) -> Option<&Hash>

pub fn new(slot_hashes: &[(u64, Hash)]) -> SlotHashes

Methods from Deref<Target = Vec<(u64, Hash), Global>>

pub fn capacity(&self) -> usize

Returns the number of elements the vector can hold without reallocating.

Examples

let vec: Vec<i32> = Vec::with_capacity(10);
assert_eq!(vec.capacity(), 10);

pub fn as_slice(&self) -> &[T]

Extracts a slice containing the entire vector.

Equivalent to &s[..].

Examples

use std::io::{self, Write};
let buffer = vec![1, 2, 3, 5, 8];
io::sink().write(buffer.as_slice()).unwrap();

pub fn as_ptr(&self) -> *const T

Returns a raw pointer to the vector’s buffer.

The caller must ensure that the vector outlives the pointer this function returns, or else it will end up pointing to garbage. Modifying the vector may cause its buffer to be reallocated, which would also make any pointers to it invalid.

The caller must also ensure that the memory the pointer (non-transitively) points to is never written to (except inside an UnsafeCell) using this pointer or any pointer derived from it. If you need to mutate the contents of the slice, use as_mut_ptr.

Examples

let x = vec![1, 2, 4];
let x_ptr = x.as_ptr();

unsafe {
    for i in 0..x.len() {
        assert_eq!(*x_ptr.add(i), 1 << i);
    }
}

pub fn allocator(&self) -> &A

🔬 This is a nightly-only experimental API. (allocator_api)

Returns a reference to the underlying allocator.

pub fn len(&self) -> usize

Returns the number of elements in the vector, also referred to as its ‘length’.

Examples

let a = vec![1, 2, 3];
assert_eq!(a.len(), 3);

pub fn is_empty(&self) -> bool

Returns true if the vector contains no elements.

Examples

let mut v = Vec::new();
assert!(v.is_empty());

v.push(1);
assert!(!v.is_empty());

Trait Implementations

impl Debug for SlotHashes

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

Formats the value using the given formatter.

impl Default for SlotHashes

pub fn default() -> SlotHashes

Returns the “default value” for a type.

impl Deref for SlotHashes

type Target = Vec<(u64, Hash), Global>

The resulting type after dereferencing.

pub fn deref(&self) -> &<SlotHashes as Deref>::Target

Dereferences the value.

impl<'de> Deserialize<'de> for SlotHashes

pub fn deserialize<__D>(
    __deserializer: __D
) -> Result<SlotHashes, <__D as Deserializer<'de>>::Error> where
    __D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

impl FromIterator<(u64, Hash)> for SlotHashes

pub fn from_iter<I>(iter: I) -> SlotHashes where
    I: IntoIterator<Item = (u64, Hash)>, 

Creates a value from an iterator.

impl PartialEq<SlotHashes> for SlotHashes

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl Serialize for SlotHashes

pub fn serialize<__S>(
    &self,
    __serializer: __S
) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error> where
    __S: Serializer, 

Serialize this value into the given Serde serializer.

impl Sysvar for SlotHashes

pub fn size_of() -> usize

pub fn from_account_info(
    _account_info: &AccountInfo<'_>
) -> Result<SlotHashes, ProgramError>

fn to_account_info(&self, account_info: &mut AccountInfo<'_>) -> Option<()>

fn get() -> Result<Self, ProgramError>

impl SysvarId for SlotHashes

pub fn check_id(pubkey: &Pubkey) -> bool

impl StructuralPartialEq for SlotHashes