Struct solana_sdk::sysvar::recent_blockhashes::RecentBlockhashes

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

Methods from Deref<Target = Vec<Entry, 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 RecentBlockhashes[+]

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pub fn clone(&self) -> RecentBlockhashes[−]

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for RecentBlockhashes[+]

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

Formats the value using the given formatter.

impl Default for RecentBlockhashes[+]

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pub fn default() -> RecentBlockhashes[−]

Returns the “default value” for a type.

impl Deref for RecentBlockhashes[+]

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type Target = Vec<Entry, Global>

The resulting type after dereferencing.

pub fn deref(&self) -> &<RecentBlockhashes as Deref>::Target[−]

Dereferences the value.

impl<'de> Deserialize<'de> for RecentBlockhashes[+]

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pub fn deserialize<__D>(
    __deserializer: __D
) -> Result<RecentBlockhashes, <__D as Deserializer<'de>>::Error> where
    __D: Deserializer<'de>, [−]

Deserialize this value from the given Serde deserializer.

impl<'a> FromIterator<IterItem<'a>> for RecentBlockhashes[+]

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pub fn from_iter<I>(iter: I) -> RecentBlockhashes where
    I: IntoIterator<Item = IterItem<'a>>, [−]

Creates a value from an iterator.

impl PartialEq<RecentBlockhashes> for RecentBlockhashes[+]

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pub fn eq(&self, other: &RecentBlockhashes) -> bool[−]

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

pub fn ne(&self, other: &RecentBlockhashes) -> bool[−]

This method tests for !=.

impl Serialize for RecentBlockhashes[+]

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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 StructuralPartialEq for RecentBlockhashes

impl Sysvar for RecentBlockhashes[+]

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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 RecentBlockhashes[+]

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