Enum Token 

pub enum Token {
    BracketOpening,
    BracketClosing,
    Separator,
    Number(f64),
    Operator(char),
    Identifier(usize),
    Unknown(char),
    Skip,
}

Token is a basic unit returned after tokenization using a StringProcessor.

Token can be than rearranged with a TokensProcessor and interpreted (evaluated) to a Polynomial using a TokensReducer.

Tokens are used to conveniently store expressions in partially parsed and computer readable form.

Variants

BracketOpening

Opening bracket ( or beginning of subexpression

BracketClosing

Closing bracket ) or ending of subexpression

Separator

Argument separator

Number(f64)

Floating point number

Operator(char)

Single character operator

Identifier(usize)

Symbol identifier (represented by index in identifiers table)

Unknown(char)

Unidentified character (with no meaning to a StringProcessor)

Skip

Skip marker

Trait Implementations

impl Clone for Token

fn clone(&self) -> Token

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Token

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

Formats the value using the given formatter.

impl PartialEq for Token

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