Enum declarative_dataflow::binding::Binding

pub enum Binding {
    Attribute(AttributeBinding),
    Not(AntijoinBinding),
    Constant(ConstantBinding),
    BinaryPredicate(BinaryPredicateBinding),
}

Binding types supported by Hector.

Variants

Attribute(AttributeBinding)

Two variables bound by (e,v) pairs from an attribute.

Not(AntijoinBinding)

Variables that must not be bound by the wrapped binding.

Constant(ConstantBinding)

A variable bound by a constant value.

BinaryPredicate(BinaryPredicateBinding)

Two variables bound by a binary predicate.

Methods

impl Binding

pub fn attribute(e: u32, name: &str, v: u32) -> Binding

Creates an AttributeBinding.

pub fn optional_attribute(e: u32, name: &str, v: u32, default: Value) -> Binding

Creates an AttributeBinding with a default value.

pub fn constant(variable: u32, value: Value) -> Binding

Creates a ConstantBinding.

pub fn binary_predicate(predicate: BinaryPredicate, x: u32, y: u32) -> Binding

Creates a BinaryPredicateBinding.

pub fn not(binding: Binding) -> Binding

Creates an AntijoinBinding.

Trait Implementations

impl AsBinding for Binding

fn variables(&self) -> Vec<u32>

All variables bound by this binding.

fn binds(&self, variable: u32) -> Option<usize>

Iff the binding has opinions about the given variable, this will return the offset, otherwise None.

fn ready_to_extend(&self, prefix: &dyn AsBinding) -> Option<u32>

Returns an optional variable by which this binding could extend the given prefix.

fn required_to_extend(
    &self,
    prefix: &dyn AsBinding,
    target: u32
) -> Option<Option<u32>>

Returns an optional variable which must be bound by the prefix in order for this binding to extend the prefix. If None, then this binding can never be used to extend the prefix to the specified variable (e.g. because it doesn't even bind it).

fn can_extend(&self, prefix: &dyn AsBinding, target: u32) -> bool

Returns true iff the binding is ready to participate in the extension of a set of prefix variables to a new variable.

impl PartialOrd<Binding> for Binding

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

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

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

This method tests less than (for self and other) and is used by the < operator.

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

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

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

This method tests greater than (for self and other) and is used by the > operator.

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

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

impl PartialEq<Binding> for Binding

fn eq(&self, other: &Binding) -> bool

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

fn ne(&self, other: &Binding) -> bool

This method tests for !=.

impl Clone for Binding

fn clone(&self) -> Binding

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Ord for Binding

fn cmp(&self, other: &Binding) -> Ordering

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.

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

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

Returns max if self is greater than max, and min if self is less than min. Otherwise this will return self. Panics if min > max.

impl Eq for Binding

impl Debug for Binding

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

Formats the value using the given formatter.

impl Hash for Binding

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, 

Feeds a slice of this type into the given [Hasher].

impl Serialize for Binding

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

Serialize this value into the given Serde serializer.

impl<'de> Deserialize<'de> for Binding

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
    __D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.