Enum ConditionExpr 

pub enum ConditionExpr {
    Single(Condition),
    And(Vec<ConditionExpr>),
    Or(Vec<ConditionExpr>),
    Not(Box<ConditionExpr>),
    Always,
    Never,
}

A composite condition expression

Variants

Single(Condition)

Single condition

And(Vec<ConditionExpr>)

Combine conditions with AND

Or(Vec<ConditionExpr>)

Combine conditions with OR

Not(Box<ConditionExpr>)

Negate a condition

Always

Always true

Never

Always false

Implementations

impl ConditionExpr

pub fn single(condition: Condition) -> Self

Create from single condition

pub fn and(conditions: Vec<ConditionExpr>) -> Self

Combine with AND

pub fn or(conditions: Vec<ConditionExpr>) -> Self

Combine with OR

pub fn negate(condition: ConditionExpr) -> Self

Negate condition

pub fn evaluate(&self, context: &RuleContext) -> bool

Evaluate expression against context

pub fn condition_count(&self) -> usize

Count the number of conditions

Trait Implementations

impl Clone for ConditionExpr

fn clone(&self) -> ConditionExpr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ConditionExpr

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

Formats the value using the given formatter.

impl PartialEq for ConditionExpr

fn eq(&self, other: &ConditionExpr) -> 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 StructuralPartialEq for ConditionExpr