Enum Token 

pub enum Token {
    Match,
    Return,
    Create,
    As,
    Distinct,
    True,
    False,
    Null,
    And,
    Or,
    Not,
    Is,
    Count,
    Where,
    Set,
    Remove,
    Delete,
    Detach,
    Optional,
    Merge,
    With,
    Order,
    By,
    Limit,
    Skip,
    Asc,
    Desc,
    On,
    Unwind,
    Index,
    Drop,
    Edge,
    Snapshot,
    From,
    Hyperedge,
    At,
    Time,
    Between,
    History,
    Float(f64),
    Integer(i64),
    StringLiteral(String),
    BacktickIdent(String),
    Ident(String),
    Parameter(String),
    NotEqual,
    BangEqual,
    LessEqual,
    GreaterEqual,
    Eq,
    Less,
    Greater,
    Plus,
    Minus,
    Star,
    Slash,
    Percent,
    ArrowRight,
    ArrowLeft,
    DoubleDash,
    LParen,
    RParen,
    LBracket,
    RBracket,
    LBrace,
    RBrace,
    Colon,
    DoubleDot,
    Dot,
    Comma,
    Pipe,
}

Lexical token for the openCypher subset supported by CypherLite.

Variants

Match

MATCH keyword.

Return

RETURN keyword.

Create

CREATE keyword.

As

AS keyword (alias).

Distinct

DISTINCT keyword.

True

Boolean literal true.

False

Boolean literal false.

Null

NULL literal.

And

Logical AND operator.

Or

Logical OR operator.

Not

Logical NOT operator.

Is

IS keyword (used in IS NULL / IS NOT NULL).

Count

COUNT aggregate function keyword.

Where

WHERE clause keyword.

Set

SET clause keyword.

Remove

REMOVE clause keyword.

Delete

DELETE clause keyword.

Detach

DETACH modifier for DELETE.

Optional

OPTIONAL modifier for MATCH.

Merge

MERGE clause keyword.

With

WITH clause keyword.

Order

ORDER keyword (part of ORDER BY).

By

BY keyword (part of ORDER BY).

Limit

LIMIT clause keyword.

Skip

SKIP clause keyword.

Asc

ASC sort direction.

Desc

DESC sort direction.

On

ON keyword (used in CREATE INDEX ... ON).

Unwind

UNWIND clause keyword.

Index

INDEX keyword.

Drop

DROP keyword.

Edge

EDGE keyword (part of CREATE EDGE INDEX).

Snapshot

SNAPSHOT keyword (part of CREATE SNAPSHOT).

From

FROM keyword (part of CREATE SNAPSHOT ... FROM).

Hyperedge

HYPEREDGE keyword for hypergraph queries.

At

AT keyword (part of AT TIME).

Time

TIME keyword (part of AT TIME / BETWEEN TIME).

Between

BETWEEN keyword (part of BETWEEN TIME).

History

HISTORY keyword for version history queries.

Float(f64)

Floating-point literal (must come before integer to match greedily).

Integer(i64)

Integer literal.

StringLiteral(String)

Single-quoted string literal with escape sequences.

BacktickIdent(String)

Backtick-quoted identifier.

Ident(String)

Regular identifier (lower priority than keywords).

Parameter(String)

Parameter reference ($name).

NotEqual

<> not-equal operator.

BangEqual

!= not-equal operator (alias).

LessEqual

<= less-than-or-equal operator.

GreaterEqual

>= greater-than-or-equal operator.

Eq

= equality / assignment operator.

Less

< less-than operator.

Greater

> greater-than operator.

Plus

+ addition operator.

Minus

- subtraction / negation operator.

Star

* multiplication / wildcard operator.

Slash

/ division operator.

Percent

% modulus operator.

ArrowRight

-> right-directed relationship arrow.

ArrowLeft

<- left-directed relationship arrow.

DoubleDash

-- undirected relationship connector.

LParen

( left parenthesis.

RParen

) right parenthesis.

LBracket

[ left bracket.

RBracket

] right bracket.

LBrace

{ left brace.

RBrace

} right brace.

Colon

: colon (label separator, property key separator).

DoubleDot

.. range separator for variable-length paths.

Dot

. property access operator.

Comma

, comma separator.

Pipe

| pipe separator (used in relationship type alternatives).

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<'s> Logos<'s> for Token

type Error = ()

Error type returned by the lexer. This can be set using #[logos(error = MyError)]. Defaults to () if not set.

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].

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.

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.

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 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