Struct solana_sdk::sysvar::stake_history::StakeHistory

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

Implementations

impl StakeHistory

pub fn get(&self, epoch: &u64) -> Option<&StakeHistoryEntry>

pub fn add(&mut self, epoch: u64, entry: StakeHistoryEntry)

Methods from Deref<Target = Vec<(u64, StakeHistoryEntry), 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 Clone for StakeHistory

pub fn clone(&self) -> StakeHistory

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for StakeHistory

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

Formats the value using the given formatter.

impl Default for StakeHistory

pub fn default() -> StakeHistory

Returns the “default value” for a type.

impl Deref for StakeHistory

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

The resulting type after dereferencing.

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

Dereferences the value.

impl<'de> Deserialize<'de> for StakeHistory

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

Deserialize this value from the given Serde deserializer.

impl Eq for StakeHistory

impl PartialEq<StakeHistory> for StakeHistory

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

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

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

This method tests for !=.

impl Serialize for StakeHistory

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 StructuralEq for StakeHistory

impl StructuralPartialEq for StakeHistory

impl Sysvar for StakeHistory

pub fn size_of() -> usize

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

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

impl SysvarId for StakeHistory

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