Enum PredicateExpr 

#[non_exhaustive]
pub enum PredicateExpr {
    Named(Arc<str>),
    Rows(Arc<[usize]>),
}

Portable predicate over units/rows.

Self::Rows is evaluated directly; Self::Named resolves through super::PopulationRegistry.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Named(Arc<str>)

Registry-named predicate resolved by callers.

Rows(Arc<[usize]>)

Explicit row indices into the bound tabular view.

Implementations

impl PredicateExpr

pub fn named(id: impl Into<Arc<str>>) -> Self

Named registry predicate.

pub fn rows(rows: impl Into<Arc<[usize]>>) -> Self

Explicit row subset.

pub fn validate(&self) -> Result<(), QueryError>

Validate predicate geometry (non-empty name / rows).

Errors

Empty name or empty row set.

Trait Implementations

impl Clone for PredicateExpr

fn clone(&self) -> PredicateExpr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PredicateExpr

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

Formats the value using the given formatter.

impl Eq for PredicateExpr

impl Hash for PredicateExpr

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for PredicateExpr

fn eq(&self, other: &PredicateExpr) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for PredicateExpr