PatternBuilder

rust_rule_engine::rete::pattern

Struct PatternBuilder 

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pub struct PatternBuilder { /* private fields */ }
Expand description

Pattern builder for easier construction (Drools-style DSL)

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impl PatternBuilder

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pub fn for_type(fact_type: impl Into<String>) -> Self

Start building pattern for a fact type

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pub fn where_field( self, field: impl Into<String>, operator: impl Into<String>, value: FactValue, ) -> Self

Add simple constraint (field op value)

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pub fn bind(self, field: impl Into<String>, variable: impl Into<String>) -> Self

Bind field to variable ($var)

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pub fn where_var( self, field: impl Into<String>, operator: impl Into<String>, variable: impl Into<String>, ) -> Self

Compare field with variable ($var)

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pub fn named(self, name: impl Into<String>) -> Self

Set pattern name

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pub fn build(self) -> Pattern

Build the pattern

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impl<T> Any for T
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fn type_id(&self) -> TypeId

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fn borrow(&self) -> &T

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fn borrow_mut(&mut self) -> &mut T

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Calls U::from(self).

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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type Error = Infallible

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