Enum GrammaticalRole 

pub enum GrammaticalRole {
    Subject,
    DirectObject,
    IndirectObject,
    Oblique,
    Other,
}

Grammatical role of a mention in its clause.

Centering theory ranks Cf members partly by grammatical role, with subjects ranking highest. This reflects the observation that subjects are typically the “topic” of a clause and more likely to be referred to in subsequent discourse.

Ranking

The standard centering hierarchy is:

SUBJECT > EXISTENTIAL > OBJECT > INDIRECT OBJECT > OBLIQUE > ADJUNCT

This module simplifies to: Subject > DirectObject > IndirectObject > Oblique > Other

Example

use anno::discourse::centering::GrammaticalRole;

assert!(GrammaticalRole::Subject.salience_weight() >
        GrammaticalRole::DirectObject.salience_weight());

Variants

Subject

Subject of clause — highest salience.

DirectObject

Direct object — second highest.

IndirectObject

Indirect object (dative).

Oblique

Oblique (prepositional object, adjunct).

Other

Other/unknown — lowest salience.

Implementations

impl GrammaticalRole

pub const fn salience_weight(&self) -> f64

Get salience weight for this role.

Based on centering theory’s Cf ranking: SUBJECT > EXISTENTIAL > OBJECT > INDIRECT OBJECT > OBLIQUE > ADJUNCT

Trait Implementations

impl Clone for GrammaticalRole

fn clone(&self) -> GrammaticalRole

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for GrammaticalRole

impl Debug for GrammaticalRole

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

Formats the value using the given formatter.

impl Default for GrammaticalRole

fn default() -> GrammaticalRole

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for GrammaticalRole

fn deserialize<__D>( __deserializer: __D, ) -> Result<GrammaticalRole, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for GrammaticalRole

impl Hash for GrammaticalRole

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for GrammaticalRole

fn eq(&self, other: &GrammaticalRole) -> 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 Serialize for GrammaticalRole

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for GrammaticalRole