Struct FileId 

pub struct FileId(/* private fields */);

A stable file identity that persists across renames and moves (§5.8).

A FileId is assigned when a file is first created and never changes, even if the file is renamed or moved. This makes rename-aware merge possible without heuristics.

Internally stored as a u128 and serialized as a 32-character lowercase hex string for canonical JSON.

Implementations

impl FileId

pub const fn new(id: u128) -> Self

Create a FileId from a raw u128.

pub fn random() -> Self

Generate a cryptographically-random FileId.

Uses the thread-local PRNG (rand 0.9). Each call produces a unique 128-bit random identifier suitable for stable file identity.

pub const fn as_u128(self) -> u128

Return the inner u128 value.

pub fn from_hex(s: &str) -> Result<Self, FileIdError>

Parse a FileId from a 32-character lowercase hex string.

Errors

Returns an error if the string is not exactly 32 lowercase hex digits.

pub fn to_hex(self) -> String

Return a 32-character lowercase hex representation of this FileId.

Trait Implementations

impl Clone for FileId

fn clone(&self) -> FileId

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FileId

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for FileId

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for FileId

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

Formats the value using the given formatter.

impl From<FileId> for String

fn from(id: FileId) -> Self

Converts to this type from the input type.

impl Hash for FileId

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 Ord for FileId

fn cmp(&self, other: &FileId) -> 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 PartialEq for FileId

fn eq(&self, other: &FileId) -> 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 PartialOrd for FileId

fn partial_cmp(&self, other: &FileId) -> 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 Serialize for FileId

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl TryFrom<String> for FileId

type Error = FileIdError

The type returned in the event of a conversion error.

fn try_from(s: String) -> Result<Self, Self::Error>

Performs the conversion.

impl Copy for FileId

impl Eq for FileId

impl StructuralPartialEq for FileId