Struct DatabaseKeyIndex

pub struct DatabaseKeyIndex { /* private fields */ }

An integer that uniquely identifies a particular query instance within the database. Used to track dependencies between queries. Fully ordered and equatable but those orderings are arbitrary, and meant to be used only for inserting into maps and the like.

Implementations

impl DatabaseKeyIndex

pub fn group_index(self) -> u16

Returns the index of the query group containing this key.

pub fn query_index(self) -> u16

Returns the index of the query within its query group.

pub fn key_index(self) -> u32

Returns the index of this particular query key within the query.

pub fn debug<D>(self, db: &D) -> impl Debug + '_

where D: ?Sized + DatabaseOps,

Returns a type that gives a user-readable debug output. Use like println!("{:?}", index.debug(db)).

Trait Implementations

impl Clone for DatabaseKeyIndex

fn clone(&self) -> DatabaseKeyIndex

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for DatabaseKeyIndex

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

Formats the value using the given formatter.

impl Hash for DatabaseKeyIndex

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 DatabaseKeyIndex

fn cmp(&self, other: &DatabaseKeyIndex) -> 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 DatabaseKeyIndex

fn eq(&self, other: &DatabaseKeyIndex) -> 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 DatabaseKeyIndex

fn partial_cmp(&self, other: &DatabaseKeyIndex) -> 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 Copy for DatabaseKeyIndex

impl Eq for DatabaseKeyIndex

impl StructuralPartialEq for DatabaseKeyIndex