Trait FunctionContext 

pub trait FunctionContext<'ctx> {
    // Required methods
    fn locale(&self) -> Locale;
    fn timezone(&self) -> &TimeZoneSpec;
    fn clock(&self) -> &dyn ClockProvider;
    fn thread_pool(&self) -> Option<&Arc<ThreadPool>>;
    fn cancellation_token(&self) -> Option<Arc<AtomicBool>>;
    fn chunk_hint(&self) -> Option<usize>;
    fn current_sheet(&self) -> &str;
    fn volatile_level(&self) -> VolatileLevel;
    fn workbook_seed(&self) -> u64;
    fn recalc_epoch(&self) -> u64;
    fn current_cell(&self) -> Option<CellRef>;
    fn resolve_range_view(
        &self,
        _reference: &ReferenceType,
        _current_sheet: &str,
    ) -> Result<RangeView<'ctx>, ExcelError>;

    // Provided methods
    fn rng_for_current(&self, fn_salt: u64) -> SmallRng { ... }
    fn date_system(&self) -> DateSystem { ... }
    fn get_criteria_mask(
        &self,
        _view: &RangeView<'_>,
        _col_in_view: usize,
        _pred: &CriteriaPredicate,
    ) -> Option<Arc<BooleanArray>> { ... }
}

Minimal context exposed to functions (no engine/graph APIs)

Required Methods

fn locale(&self) -> Locale

fn timezone(&self) -> &TimeZoneSpec

fn clock(&self) -> &dyn ClockProvider

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

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

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

fn current_sheet(&self) -> &str

Current formula sheet name.

fn volatile_level(&self) -> VolatileLevel

fn workbook_seed(&self) -> u64

fn recalc_epoch(&self) -> u64

fn current_cell(&self) -> Option<CellRef>

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

Resolve a reference into a RangeView using the underlying engine context.

Provided Methods

fn rng_for_current(&self, fn_salt: u64) -> SmallRng

Deterministic RNG seeded for the current evaluation site and function salt.

fn date_system(&self) -> DateSystem

Workbook date system selection (1900 vs 1904).

fn get_criteria_mask( &self, _view: &RangeView<'_>, _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. Returns None if not supported by the underlying context.

Implementors

impl<'a> FunctionContext<'a> for DefaultFunctionContext<'a>