Enum Ambiguity 

pub enum Ambiguity {
    FirstMatch,
    Error,
}

How to resolve an entity type that the grammar leaves ambiguous.

When a phrase omits a type (e.g. "jack contacts jill"), nl3 infers it from the matched predicate. If the predicate maps to a single type, that type is always used. This policy only applies when more than one candidate type exists.

Variants

FirstMatch

Use the first candidate type, in grammar declaration order. (Default.)

Error

Return ParseError::AmbiguousType instead of guessing.

Trait Implementations

impl Clone for Ambiguity

fn clone(&self) -> Ambiguity

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Ambiguity

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

Formats the value using the given formatter.

impl Default for Ambiguity

fn default() -> Ambiguity

Returns the “default value” for a type.

impl PartialEq for Ambiguity

fn eq(&self, other: &Ambiguity) -> 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 Copy for Ambiguity

impl Eq for Ambiguity

impl StructuralPartialEq for Ambiguity