Struct phreak_engine::jointest::JoinNodeTest

pub struct JoinNodeTest {
    pub f1: JoinTestField,
    pub condition_number_of_arg2: usize,
    pub f2: JoinTestField,
}

A test compares a field in the current WME against a field from a WME that is x steps back.

A Token chain represents a list of matches that belong together. By taking the parent token, one goes back one step into the chain. Each step may contain a WME. The JoinNodeTest defines which WME to compare against the current WME, and defines which fields in the WME's should be compared against eachother. Note that the current WME is a candidate for a token that would be at the top of the chain. This token would be at step 0. The real top token thus becomes step 1, it's parent becomes step 2, etc.

Fields

f1: JoinTestField

The field in the current WME we would like to compare.

condition_number_of_arg2: usize

Number of steps back towards the root-token in order to find the second WME.

f2: JoinTestField

The field in the second WME to compare against.

Trait Implementations

impl Debug for JoinNodeTest

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

Formats the value using the given formatter.

impl Eq for JoinNodeTest

impl Ord for JoinNodeTest

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

This method returns an [Ordering] between self and other.

#[must_use] fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

#[must_use] fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

#[must_use] fn clamp(self, min: Self, max: Self) -> Self

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

Restrict a value to a certain interval.

impl PartialEq<JoinNodeTest> for JoinNodeTest

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

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

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

This method tests for !=.

impl PartialOrd<JoinNodeTest> for JoinNodeTest

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

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

#[must_use] fn lt(&self, other: &Rhs) -> bool

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

#[must_use] fn le(&self, other: &Rhs) -> bool

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

#[must_use] fn gt(&self, other: &Rhs) -> bool

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

#[must_use] fn ge(&self, other: &Rhs) -> bool

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

impl StructuralEq for JoinNodeTest

impl StructuralPartialEq for JoinNodeTest