Struct Filter 

pub struct Filter {
    pub terms: Vec<FilterTerm>,
}

0.8.11 Slice 40 (#17) — the unified closed Filter contract. ONE superset type with implicit-AND FilterTerms, dispatched to one of two internal compilation backends (Option A — the TYPE unifies, the COMPILATION dispatches): the vec0-metadata indexed pre-KNN WHERE for search_filtered, and json_extract over canonical_nodes.body for read.list. The shipped SearchFilter (G10) and Predicate lists (G4) re-express as sugar that lowers into this type (D4); the filter=None byte-identical-0.7.2-SQL pin is preserved because the vec0 lowering routes back through the shipped vector_filter_clause compilation verbatim.

Fields

terms: Vec<FilterTerm>

AND-combined terms (implicit AND, inherits D-F5). Empty = unfiltered.

Implementations

impl Filter

pub fn to_search_filter(&self) -> Result<SearchFilter, EngineError>

Backend dispatch for search_filtered (vec0 — indexed pre-KNN). Lowers the metadata subset {SourceType, Kind, CreatedAfter, Status} back into a SearchFilter (which the shipped vector_filter_clause compiles to the pre-KNN WHERE), and typed-rejects a FilterTerm::Json term with EngineError::InvalidFilter — the explicit no-demotion guarantee (D3). Field-by-variant assignment makes the output canonical-order-independent of terms ordering (hand-built router filters included). A later duplicate metadata term overwrites the earlier (last-wins).

Trait Implementations

impl Clone for Filter

fn clone(&self) -> Filter

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Filter

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

Formats the value using the given formatter.

impl Default for Filter

fn default() -> Filter

Returns the “default value” for a type.

impl PartialEq for Filter

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Filter

impl TryFrom<&SearchFilter> for Filter

fn try_from(sf: &SearchFilter) -> Result<Self, Self::Error>

D4 sugar lowering — the shipped G10 SearchFilter re-expressed as the unified Filter. Attribute equality is intentionally not part of the unified grammar, so it is refused rather than silently discarded. Field → term uses canonical order (source_type, kind, created_after, status) so an attribute-free round-trip stays byte-identical.

type Error = EngineError

The type returned in the event of a conversion error.