Struct FixedString 

#[repr(transparent)]
pub struct FixedString<const N: usize>(pub [u8; N]);

A fixed-capacity string stored as a zero-padded UTF-8 byte array.

N is the maximum number of bytes (not characters). Strings shorter than N are zero-padded. Strings longer than N are truncated at the last valid UTF-8 character boundary that fits.

This type is Copy, #[repr(transparent)], and safe to embed in #[repr(C)] shared memory structs.

Tuple Fields

0: [u8; N]

Implementations

impl<const N: usize> FixedString<N>

pub const fn new() -> Self

Create an empty (all-zero) fixed string.

pub fn set(&mut self, s: &str)

Set the string content, truncating at the last UTF-8 boundary that fits.

pub fn as_str(&self) -> &str

Return the string content as a &str.

Trailing zeros are excluded. If the buffer contains invalid UTF-8 (e.g. from external corruption), returns an empty string.

pub fn len(&self) -> usize

Number of bytes in the string (excluding trailing zeros).

pub fn is_empty(&self) -> bool

Returns true if the string is empty.

pub fn clear(&mut self)

Clear the string (fill with zeros).

pub const fn capacity(&self) -> usize

The fixed capacity in bytes.

Trait Implementations

impl<const N: usize> Clone for FixedString<N>

fn clone(&self) -> FixedString<N>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<const N: usize> Debug for FixedString<N>

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

Formats the value using the given formatter.

impl<const N: usize> Default for FixedString<N>

fn default() -> Self

Returns the “default value” for a type.

impl<'de, const N: usize> Deserialize<'de> for FixedString<N>

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

Deserialize this value from the given Serde deserializer.

impl<const N: usize> Display for FixedString<N>

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

Formats the value using the given formatter.

impl<const N: usize> From<&str> for FixedString<N>

fn from(s: &str) -> Self

Converts to this type from the input type.

impl<const N: usize> Hash for FixedString<N>

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 N: usize> PartialEq for FixedString<N>

fn eq(&self, other: &Self) -> 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 N: usize> Serialize for FixedString<N>

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

Serialize this value into the given Serde serializer.

impl<const N: usize> Copy for FixedString<N>

impl<const N: usize> Eq for FixedString<N>