Enum ExpressionKind 

pub enum ExpressionKind {
    Literal(Box<LiteralValue>),
    FactPath(FactPath),
    RulePath(RulePath),
    LogicalAnd(Arc<Expression>, Arc<Expression>),
    Arithmetic(Arc<Expression>, ArithmeticComputation, Arc<Expression>),
    Comparison(Arc<Expression>, ComparisonComputation, Arc<Expression>),
    UnitConversion(Arc<Expression>, SemanticConversionTarget),
    LogicalNegation(Arc<Expression>, NegationType),
    MathematicalComputation(MathematicalComputation, Arc<Expression>),
    Veto(VetoExpression),
    Now,
    DateRelative(DateRelativeKind, Arc<Expression>, Option<Arc<Expression>>),
    DateCalendar(DateCalendarKind, CalendarUnit, Arc<Expression>),
}

Resolved expression kind (only resolved variants, no unresolved references)

Variants

Literal(Box<LiteralValue>)

Resolved literal with type (boxed to keep enum small)

FactPath(FactPath)

Resolved fact path

RulePath(RulePath)

Resolved rule path

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

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

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

UnitConversion(Arc<Expression>, SemanticConversionTarget)

LogicalNegation(Arc<Expression>, NegationType)

MathematicalComputation(MathematicalComputation, Arc<Expression>)

Veto(VetoExpression)

Now

The now keyword — resolved at evaluation to the effective datetime.

DateRelative(DateRelativeKind, Arc<Expression>, Option<Arc<Expression>>)

Date-relative sugar: <date_expr> in past [<duration_expr>] / in future [...]

DateCalendar(DateCalendarKind, CalendarUnit, Arc<Expression>)

Calendar-period sugar: <date_expr> in [past|future] calendar year|month|week

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