Enum CommonFoldState 

pub enum CommonFoldState {
    Count(usize),
    SumI64(i64),
    Any(bool),
}

Unified state returned by CommonFold.

Variants

Count(usize)

Count-like output.

SumI64(i64)

Summation output.

Any(bool)

Boolean existential output.

Trait Implementations

impl Clone for CommonFoldState

fn clone(&self) -> CommonFoldState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CommonFoldState

impl Debug for CommonFoldState

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

Formats the value using the given formatter.

impl Eq for CommonFoldState

impl<L> Fold<L, CommonFoldState> for CommonFold<L>

fn reduce( &self, state: CommonFoldState, entry: &L, context: &FoldContext, ) -> CommonFoldState

Panics if state variant does not match self; use try_step for fallible version.

fn init(&self, _context: &FoldContext) -> CommonFoldState

Get the initial state before any entries are processed.

fn finalize(&self, state: S, _context: &FoldContext) -> S

Finalize the state after all entries are processed; default returns state unchanged.

fn derive<'a, I>(&self, entries: I, context: &FoldContext) -> FoldOutcome<S>

where Self: Sized, I: IntoIterator<Item = &'a L>, L: 'a,

Derive state from an iterator of entries.

fn derive_filtered<'a, I, F>( &self, entries: I, context: &FoldContext, filter: F, ) -> FoldOutcome<S>

where Self: Sized, I: IntoIterator<Item = &'a L>, L: 'a, F: Fn(&L) -> bool,

Derive state with a filter.

impl PartialEq for CommonFoldState

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for CommonFoldState

impl<L> TryFold<L, CommonFoldState> for CommonFold<L>

fn try_step( &self, state: CommonFoldState, entry: &L, context: &FoldContext, ) -> Result<CommonFoldState, FoldFailure>

Process a single entry and return an error instead of panicking.