Struct kul_core::parser::premade::EmptyOperatorBindings

pub struct EmptyOperatorBindings;

An OperatorBindings that always has no bindings and its lookup method always returns None.

Trait Implementations

impl<DA> OperatorBindings<DA> for EmptyOperatorBindings where
    DA: DatumAllocator, 

type OR = DummyOperativeRef<DA, Self::CE>

The type of references to Operative macro functions.

type AR = DummyApplicativeRef<DA, Self::CE>

The type of references to Applicative macro functions.

type CE = ()

The combiner error extension type.

fn lookup(
    &self,
    _operator: &Datum<DA::TT, DA::ET, DA::DR>
) -> Option<&Combiner<Self::OR, Self::AR>>

Look-up any binding we might have associated with the given datum, referenced by the operator argument, which was found in operator (first, "head") position of a nested form. If we do have a binding for it, return the "combiner" function that determines the semantics of the entire form and further parses and processes it in possibly arbitrary ways. Else if we do not have a binding, return None to indicate that the form should not be handled according to the operator and that the operands should simply be recursively parsed.

impl Debug for EmptyOperatorBindings

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

Formats the value using the given formatter.