Trait EvaluationContext 

pub trait EvaluationContext: Resolver + FunctionProvider {
    // Provided methods
    fn thread_pool(&self) -> Option<&Arc<ThreadPool>> { ... }
    fn cancellation_token(&self) -> Option<&AtomicBool> { ... }
    fn chunk_hint(&self) -> Option<usize> { ... }
    fn resolve_range_view<'c>(
        &'c self,
        _reference: &ReferenceType,
        _current_sheet: &str,
    ) -> Result<RangeView<'c>, ExcelError> { ... }
    fn locale(&self) -> Locale { ... }
    fn timezone(&self) -> &TimeZoneSpec { ... }
    fn volatile_level(&self) -> VolatileLevel { ... }
    fn workbook_seed(&self) -> u64 { ... }
    fn recalc_epoch(&self) -> u64 { ... }
    fn used_rows_for_columns(
        &self,
        _sheet: &str,
        _start_col: u32,
        _end_col: u32,
    ) -> Option<(u32, u32)> { ... }
    fn used_cols_for_rows(
        &self,
        _sheet: &str,
        _start_row: u32,
        _end_row: u32,
    ) -> Option<(u32, u32)> { ... }
    fn sheet_bounds(&self, _sheet: &str) -> Option<(u32, u32)> { ... }
    fn data_snapshot_id(&self) -> u64 { ... }
    fn backend_caps(&self) -> BackendCaps { ... }
    fn arrow_fastpath_enabled(&self) -> bool { ... }
    fn date_system(&self) -> DateSystem { ... }
    fn build_criteria_mask(
        &self,
        _view: &ArrowRangeView<'_>,
        _col_in_view: usize,
        _pred: &CriteriaPredicate,
    ) -> Option<Arc<BooleanArray>> { ... }
}

Provided Methods

fn thread_pool(&self) -> Option<&Arc<ThreadPool>>

Get access to the shared thread pool for parallel evaluation Returns None if parallel evaluation is disabled or unavailable

fn cancellation_token(&self) -> Option<&AtomicBool>

Optional cancellation token. When Some, long-running operations should periodically abort.

fn chunk_hint(&self) -> Option<usize>

Optional chunk size hint for streaming visitors.

fn resolve_range_view<'c>( &'c self, _reference: &ReferenceType, _current_sheet: &str, ) -> Result<RangeView<'c>, ExcelError>

Resolve a reference into a RangeView with clear bounds. Implementations should resolve un/partially bounded references using used-region.

fn locale(&self) -> Locale

Locale provider: invariant by default

fn timezone(&self) -> &TimeZoneSpec

Timezone provider for date/time functions Default: Local (Excel-compatible behavior) Functions should use local timezone when this returns Local

fn volatile_level(&self) -> VolatileLevel

Volatile granularity. Default Always for backwards compatibility.

fn workbook_seed(&self) -> u64

A stable workbook seed for RNG composition.

fn recalc_epoch(&self) -> u64

Recalc epoch that increments on each full recalc when appropriate.

fn used_rows_for_columns( &self, _sheet: &str, _start_col: u32, _end_col: u32, ) -> Option<(u32, u32)>

Optional: Return the min/max used rows for a set of columns on a sheet. When None, the backend does not provide used-region hints.

fn used_cols_for_rows( &self, _sheet: &str, _start_row: u32, _end_row: u32, ) -> Option<(u32, u32)>

Optional: Return the min/max used columns for a set of rows on a sheet. When None, the backend does not provide used-region hints.

fn sheet_bounds(&self, _sheet: &str) -> Option<(u32, u32)>

Optional: Physical sheet bounds (max rows, max cols) if known.

fn data_snapshot_id(&self) -> u64

Monotonic identifier for the current data snapshot; increments on mutation.

fn backend_caps(&self) -> BackendCaps

Backend capability advertisement for IO/adapters.

fn arrow_fastpath_enabled(&self) -> bool

Feature gate: enable Arrow fast paths in builtins (e.g., SUMIFS). Default is false; engines that wish to enable must override.

fn date_system(&self) -> DateSystem

Workbook date system selection (1900 vs 1904). Defaults to 1900 for compatibility.

fn build_criteria_mask( &self, _view: &ArrowRangeView<'_>, _col_in_view: usize, _pred: &CriteriaPredicate, ) -> Option<Arc<BooleanArray>>

Optional: Build or fetch a cached boolean mask for a criterion over an Arrow-backed view. Implementations should return None if not supported.

Implementors

impl EvaluationContext for TestWorkbook

impl<R> EvaluationContext for Engine<R>

where R: EvaluationContext,