Enum Expression

pub enum Expression<N, T> {
    TokenKind {
        token_kind: T,
    },
    Nonterminal {
        nonterminal: N,
    },
    Alternation {
        expressions: Vec<Expression<N, T>>,
    },
    Concatenation {
        expressions: Vec<Expression<N, T>>,
    },
    Repetition {
        expression: Box<Expression<N, T>>,
        min: Option<u32>,
        max: Option<u32>,
    },
}

Variants

TokenKind

Fields

token_kind: T

Nonterminal

Fields

nonterminal: N

Alternation

Fields

expressions: Vec<Expression<N, T>>

Concatenation

Fields

expressions: Vec<Expression<N, T>>

Repetition

Fields

expression: Box<Expression<N, T>>

min: Option<u32>

max: Option<u32>

Implementations

impl<N, T> Expression<N, T>

where N: Clone + Ord, T: Clone + PartialEq,

pub fn parse( &self, tokens: &[Token<T>], productions: &BTreeMap<N, Expression<N, T>>, ) -> Result<ParseTree<N, T>, &'static str>

Trait Implementations

impl<N, T> Clone for Expression<N, T>

where N: Clone, T: Clone,

fn clone(&self) -> Expression<N, T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<N, T> Debug for Expression<N, T>

where N: Debug, T: Debug,

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

Formats the value using the given formatter.

impl<N, T> Ord for Expression<N, T>

where N: Ord, T: Ord,

fn cmp(&self, other: &Expression<N, T>) -> 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<N, T> PartialEq for Expression<N, T>

where N: PartialEq, T: PartialEq,

fn eq(&self, other: &Expression<N, T>) -> 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<N, T> PartialOrd for Expression<N, T>

where N: PartialOrd, T: PartialOrd,

fn partial_cmp(&self, other: &Expression<N, T>) -> 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<N, T> Eq for Expression<N, T>

where N: Eq, T: Eq,

impl<N, T> StructuralPartialEq for Expression<N, T>