Enum wcal::lexer::Token

pub enum Token {
    Error,
    NewLine,
    Plus,
    Minus,
    Times,
    Division,
    LP,
    RP,
    Number(u64),
}

Token of the calculator lexical structure.

Variants

Error

NewLine

Lexer will stop while meet the NewLine

Plus

Minus

Times

Division

LP

RP

Number(u64)

Number contains u64 variable, raise an error if overflow

Trait Implementations

impl Clone for Token

fn clone(&self) -> Token

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for Token

impl Debug for Token

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

Formats the value using the given formatter.

impl Display for Token

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

Formats the value using the given formatter.

impl<'s> Logos<'s> for Token

type Extras = ()

Associated type Extras for the particular lexer. This can be set using #[logos(extras = MyExtras)] and accessed inside callbacks.

type Source = str

Source type this token can be lexed from. This will default to str, unless one of the defined patterns explicitly uses non-unicode byte values or byte slices, in which case that implementation will use [u8].

const ERROR: Self

Helper const of the variant marked as #[error].

fn lex(lex: &mut Lexer<'s, Self>)

The heart of Logos. Called by the Lexer. The implementation for this function is generated by the logos-derive crate.

pub fn lexer(source: &'source Self::Source) -> Lexer<'source, Self> where
    Self::Extras: Default, 

Create a new instance of a Lexer that will produce tokens implementing this Logos.

pub fn lexer_with_extras(
    source: &'source Self::Source,
    extras: Self::Extras
) -> Lexer<'source, Self>

Create a new instance of a Lexer with the provided Extras that will produce tokens implementing this Logos.

impl PartialEq<Token> for Token

fn eq(&self, other: &Token) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Token) -> bool

This method tests for !=.

impl StructuralPartialEq for Token