Enum TerminalSymbol

pub enum TerminalSymbol<Term> {
    Term(Term),
    Error,
    Eof,
}

A type for terminal symbols in the grammar. just because we have to take care of the error token specially, and future support for other special tokens.

Variants

Term(Term)

Error

Eof

Implementations

impl<Term> TerminalSymbol<Term>

pub fn is_error(&self) -> bool

pub fn is_term(&self) -> bool

pub fn is_eof(&self) -> bool

pub fn to_term(&self) -> Option<&Term>

converts self to a term if it is a Term variant, otherwise returns None.

pub fn into_term(self) -> Option<Term>

converts self to a term if it is a Term variant, otherwise returns None.

Trait Implementations

impl<Term> Clone for TerminalSymbol<Term>

where Term: Clone,

fn clone(&self) -> TerminalSymbol<Term>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<Term> Debug for TerminalSymbol<Term>

where Term: Debug,

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

Formats the value using the given formatter.

impl<Term> Display for TerminalSymbol<Term>

where Term: Display,

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

Formats the value using the given formatter.

impl<Term> Hash for TerminalSymbol<Term>

where Term: Hash,

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<Term> Ord for TerminalSymbol<Term>

where Term: Ord,

fn cmp(&self, other: &TerminalSymbol<Term>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<Term> PartialEq for TerminalSymbol<Term>

where Term: PartialEq,

fn eq(&self, other: &TerminalSymbol<Term>) -> 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<Term> PartialOrd for TerminalSymbol<Term>

where Term: PartialOrd,

fn partial_cmp(&self, other: &TerminalSymbol<Term>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<Term> Copy for TerminalSymbol<Term>

where Term: Copy,

impl<Term> Eq for TerminalSymbol<Term>

where Term: Eq,

impl<Term> StructuralPartialEq for TerminalSymbol<Term>