Struct SqlFixedBytes 

pub struct SqlFixedBytes<const BYTES: usize>(/* private fields */);

A wrapper around FixedBytes that provides a SQL-compatible type for fixed-size byte arrays.

Implementations

impl<const BYTES: usize> SqlFixedBytes<BYTES>

pub const ZERO: Self

Creates a new SqlFixedBytes initialized to zero.

pub fn new(bytes: [u8; BYTES]) -> Self

Creates a new SqlFixedBytes from a [u8; BYTES].

pub fn inner(&self) -> &FixedBytes<BYTES>

Returns a reference to the inner FixedBytes<BYTES>.

pub const fn from_bytes(bytes: FixedBytes<BYTES>) -> Self

Creates a new SqlFixedBytes from a FixedBytes<BYTES>.

pub fn to_address(&self) -> Option<SqlAddress>

Attempts to interpret the fixed bytes as an Ethereum address (last 20 bytes). Returns None if the length is not 32 or the prefix is not zeroed.

pub fn to_u256(&self) -> SqlU256

Interprets the fixed bytes as a U256 (no check, always possible for 32 bytes).

Methods from Deref<Target = FixedBytes<BYTES>>

pub const ZERO: FixedBytes<N>

pub fn as_slice(&self) -> &[u8]

Returns a slice containing the entire array. Equivalent to &s[..].

pub fn covers(&self, other: &FixedBytes<N>) -> bool

Returns true if all bits set in self are also set in b.

pub fn const_eq(&self, other: &FixedBytes<N>) -> bool

Compile-time equality. NOT constant-time equality.

pub fn is_zero(&self) -> bool

Returns true if no bits are set.

pub fn const_is_zero(&self) -> bool

Returns true if no bits are set.

Methods from Deref<Target = [u8; N]>

pub fn as_ascii(&self) -> Option<&[AsciiChar; N]>

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

Converts this array of bytes into an array of ASCII characters, or returns None if any of the characters is non-ASCII.

Examples

#![feature(ascii_char)]

const HEX_DIGITS: [std::ascii::Char; 16] =
    *b"0123456789abcdef".as_ascii().unwrap();

assert_eq!(HEX_DIGITS[1].as_str(), "1");
assert_eq!(HEX_DIGITS[10].as_str(), "a");

pub unsafe fn as_ascii_unchecked(&self) -> &[AsciiChar; N]

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

Converts this array of bytes into an array of ASCII characters, without checking whether they’re valid.

Safety

Every byte in the array must be in 0..=127, or else this is UB.

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

Returns a slice containing the entire array. Equivalent to &s[..].

pub fn as_mut_slice(&mut self) -> &mut [T]

Returns a mutable slice containing the entire array. Equivalent to &mut s[..].

pub fn each_ref(&self) -> [&T; N]

Borrows each element and returns an array of references with the same size as self.

Example

let floats = [3.1, 2.7, -1.0];
let float_refs: [&f64; 3] = floats.each_ref();
assert_eq!(float_refs, [&3.1, &2.7, &-1.0]);

This method is particularly useful if combined with other methods, like map. This way, you can avoid moving the original array if its elements are not Copy.

let strings = ["Ferris".to_string(), "♥".to_string(), "Rust".to_string()];
let is_ascii = strings.each_ref().map(|s| s.is_ascii());
assert_eq!(is_ascii, [true, false, true]);

// We can still access the original array: it has not been moved.
assert_eq!(strings.len(), 3);

pub fn each_mut(&mut self) -> [&mut T; N]

Borrows each element mutably and returns an array of mutable references with the same size as self.

Example

let mut floats = [3.1, 2.7, -1.0];
let float_refs: [&mut f64; 3] = floats.each_mut();
*float_refs[0] = 0.0;
assert_eq!(float_refs, [&mut 0.0, &mut 2.7, &mut -1.0]);
assert_eq!(floats, [0.0, 2.7, -1.0]);

pub fn split_array_ref<const M: usize>(&self) -> (&[T; M], &[T])

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

Divides one array reference into two at an index.

The first will contain all indices from [0, M) (excluding the index M itself) and the second will contain all indices from [M, N) (excluding the index N itself).

Panics

Panics if M > N.

Examples

#![feature(split_array)]

let v = [1, 2, 3, 4, 5, 6];

{
   let (left, right) = v.split_array_ref::<0>();
   assert_eq!(left, &[]);
   assert_eq!(right, &[1, 2, 3, 4, 5, 6]);
}

{
    let (left, right) = v.split_array_ref::<2>();
    assert_eq!(left, &[1, 2]);
    assert_eq!(right, &[3, 4, 5, 6]);
}

{
    let (left, right) = v.split_array_ref::<6>();
    assert_eq!(left, &[1, 2, 3, 4, 5, 6]);
    assert_eq!(right, &[]);
}

pub fn split_array_mut<const M: usize>(&mut self) -> (&mut [T; M], &mut [T])

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

Divides one mutable array reference into two at an index.

The first will contain all indices from [0, M) (excluding the index M itself) and the second will contain all indices from [M, N) (excluding the index N itself).

Panics

Panics if M > N.

Examples

#![feature(split_array)]

let mut v = [1, 0, 3, 0, 5, 6];
let (left, right) = v.split_array_mut::<2>();
assert_eq!(left, &mut [1, 0][..]);
assert_eq!(right, &mut [3, 0, 5, 6]);
left[1] = 2;
right[1] = 4;
assert_eq!(v, [1, 2, 3, 4, 5, 6]);

pub fn rsplit_array_ref<const M: usize>(&self) -> (&[T], &[T; M])

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

Divides one array reference into two at an index from the end.

The first will contain all indices from [0, N - M) (excluding the index N - M itself) and the second will contain all indices from [N - M, N) (excluding the index N itself).

Panics

Panics if M > N.

Examples

#![feature(split_array)]

let v = [1, 2, 3, 4, 5, 6];

{
   let (left, right) = v.rsplit_array_ref::<0>();
   assert_eq!(left, &[1, 2, 3, 4, 5, 6]);
   assert_eq!(right, &[]);
}

{
    let (left, right) = v.rsplit_array_ref::<2>();
    assert_eq!(left, &[1, 2, 3, 4]);
    assert_eq!(right, &[5, 6]);
}

{
    let (left, right) = v.rsplit_array_ref::<6>();
    assert_eq!(left, &[]);
    assert_eq!(right, &[1, 2, 3, 4, 5, 6]);
}

pub fn rsplit_array_mut<const M: usize>(&mut self) -> (&mut [T], &mut [T; M])

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

Divides one mutable array reference into two at an index from the end.

The first will contain all indices from [0, N - M) (excluding the index N - M itself) and the second will contain all indices from [N - M, N) (excluding the index N itself).

Panics

Panics if M > N.

Examples

#![feature(split_array)]

let mut v = [1, 0, 3, 0, 5, 6];
let (left, right) = v.rsplit_array_mut::<4>();
assert_eq!(left, &mut [1, 0]);
assert_eq!(right, &mut [3, 0, 5, 6][..]);
left[1] = 2;
right[1] = 4;
assert_eq!(v, [1, 2, 3, 4, 5, 6]);

Trait Implementations

impl<const BYTES: usize> AsRef<FixedBytes<BYTES>> for SqlFixedBytes<BYTES>

fn as_ref(&self) -> &FixedBytes<BYTES>

Converts this type into a shared reference of the (usually inferred) input type.

impl<const BYTES: usize> Clone for SqlFixedBytes<BYTES>

fn clone(&self) -> SqlFixedBytes<BYTES>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<const BYTES: usize> Debug for SqlFixedBytes<BYTES>

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

Formats the value using the given formatter.

impl<'a, DB: Database> Decode<'a, DB> for SqlFixedBytes<32>

where String: Decode<'a, DB>,

Available on crate feature sqlx only.

fn decode(value: <DB as Database>::ValueRef<'a>) -> Result<Self, BoxDynError>

Decode a new value of this type using a raw value from the database.

impl<const BYTES: usize> Default for SqlFixedBytes<BYTES>

fn default() -> Self

Returns the “default value” for a type.

impl<const BYTES: usize> Deref for SqlFixedBytes<BYTES>

type Target = FixedBytes<BYTES>

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<'de, const BYTES: usize> Deserialize<'de> for SqlFixedBytes<BYTES>

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<const BYTES: usize> Display for SqlFixedBytes<BYTES>

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

Formats the value using the given formatter.

impl<'a, DB: Database> Encode<'a, DB> for SqlFixedBytes<32>

where String: Encode<'a, DB>,

Available on crate feature sqlx only.

fn encode_by_ref( &self, buf: &mut <DB as Database>::ArgumentBuffer<'a>, ) -> Result<IsNull, BoxDynError>

Writes the value of self into buf without moving self.

fn encode( self, buf: &mut <DB as Database>::ArgumentBuffer<'q>, ) -> Result<IsNull, Box<dyn Error + Sync + Send>>

where Self: Sized,

Writes the value of self into buf in the expected format for the database.

fn produces(&self) -> Option<<DB as Database>::TypeInfo>

fn size_hint(&self) -> usize

impl<const BYTES: usize> From<FixedBytes<BYTES>> for SqlFixedBytes<BYTES>

fn from(bytes: FixedBytes<BYTES>) -> Self

Converts to this type from the input type.

impl<const BYTES: usize> From<SqlFixedBytes<BYTES>> for FixedBytes<BYTES>

fn from(sql_bytes: SqlFixedBytes<BYTES>) -> Self

Converts to this type from the input type.

impl<const BYTES: usize> FromStr for SqlFixedBytes<BYTES>

type Err = <FixedBytes<BYTES> as FromStr>::Err

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl<const BYTES: usize> Hash for SqlFixedBytes<BYTES>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<const BYTES: usize> Ord for SqlFixedBytes<BYTES>

fn cmp(&self, other: &SqlFixedBytes<BYTES>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<const BYTES: usize> PartialEq for SqlFixedBytes<BYTES>

fn eq(&self, other: &SqlFixedBytes<BYTES>) -> 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<const BYTES: usize> PartialOrd for SqlFixedBytes<BYTES>

fn partial_cmp(&self, other: &SqlFixedBytes<BYTES>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<const BYTES: usize> Serialize for SqlFixedBytes<BYTES>

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<DB: Database> Type<DB> for SqlFixedBytes<32>

where String: Type<DB>,

Available on crate feature sqlx only.

for SqlFixedBytes<32>

fn type_info() -> DB::TypeInfo

Returns the canonical SQL type for this Rust type.

fn compatible(ty: &DB::TypeInfo) -> bool

Determines if this Rust type is compatible with the given SQL type.

impl<const BYTES: usize> Copy for SqlFixedBytes<BYTES>

impl<const BYTES: usize> Eq for SqlFixedBytes<BYTES>

impl<const BYTES: usize> StructuralPartialEq for SqlFixedBytes<BYTES>