triblespace_core::query::regularpathconstraint

Enum PathOp

pub enum PathOp {
    Attr(RawId),
    Concat,
    Union,
    Star,
    Plus,
}

Expand description

Postfix-encoded path operations (used by the path! macro).

The macro compiles a path expression into a sequence of these operations. RegularPathConstraint::new converts the postfix sequence into a tree for evaluation.

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Attr(RawId)

Single-attribute hop: traverse the given attribute.

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Concat

Concatenation: compose the two preceding sub-expressions.

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Union

Alternation: match either of the two preceding sub-expressions.

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Star

Reflexive-transitive closure (*): zero or more repetitions.

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Plus

Transitive closure (+): one or more repetitions.

Trait Implementations§

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impl Clone for PathOp

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fn clone(&self) -> PathOp

Returns a duplicate of the value. Read more

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

Performs copy-assignment from source. Read more

Auto Trait Implementations§

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impl UnwindSafe for PathOp

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more

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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

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

Performs copy-assignment from self to dest. Read more

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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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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