Enum ExpressionKind 

pub enum ExpressionKind {
    Literal(LiteralValue),
    Reference(Reference),
    UnresolvedUnitLiteral(Decimal, String),
    FactReference(FactReference),
    RuleReference(RuleReference),
    LogicalAnd(Arc<Expression>, Arc<Expression>),
    LogicalOr(Arc<Expression>, Arc<Expression>),
    Arithmetic(Arc<Expression>, ArithmeticComputation, Arc<Expression>),
    Comparison(Arc<Expression>, ComparisonComputation, Arc<Expression>),
    UnitConversion(Arc<Expression>, ConversionTarget),
    LogicalNegation(Arc<Expression>, NegationType),
    MathematicalComputation(MathematicalComputation, Arc<Expression>),
    Veto(VetoExpression),
    FactPath(FactPath),
    RulePath(RulePath),
}

The kind/type of expression

Variants

Literal(LiteralValue)

Reference(Reference)

Unresolved reference from parser (resolved during planning)

UnresolvedUnitLiteral(Decimal, String)

Unresolved unit literal from parser (resolved during planning) Contains (number, unit_name) - the unit name will be resolved to its type during semantic analysis

FactReference(FactReference)

Resolved fact reference (converted from Reference during planning)

RuleReference(RuleReference)

LogicalAnd(Arc<Expression>, Arc<Expression>)

LogicalOr(Arc<Expression>, Arc<Expression>)

Arithmetic(Arc<Expression>, ArithmeticComputation, Arc<Expression>)

Comparison(Arc<Expression>, ComparisonComputation, Arc<Expression>)

UnitConversion(Arc<Expression>, ConversionTarget)

LogicalNegation(Arc<Expression>, NegationType)

MathematicalComputation(MathematicalComputation, Arc<Expression>)

Veto(VetoExpression)

FactPath(FactPath)

Resolved fact path (used after planning, converted from FactReference)

RulePath(RulePath)

Resolved rule path (used after planning, converted from RuleReference)

Trait Implementations

impl Clone for ExpressionKind

fn clone(&self) -> ExpressionKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExpressionKind

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ExpressionKind

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for ExpressionKind

fn eq(&self, other: &ExpressionKind) -> 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 Serialize for ExpressionKind

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ExpressionKind