Enum TokenKind

pub enum TokenKind {
    LineComment {
        doc_style: Option<DocStyle>,
    },
    BlockComment {
        doc_style: Option<DocStyle>,
        terminated: bool,
    },
    Whitespace,
    Ident,
    RawIdent,
    UnknownPrefix,
    Literal {
        kind: LiteralKind,
        suffix_start: usize,
    },
    Lifetime {
        starts_with_number: bool,
    },
    Semi,
    Comma,
    Dot,
    OpenParen,
    CloseParen,
    OpenBrace,
    CloseBrace,
    OpenBracket,
    CloseBracket,
    At,
    Pound,
    Tilde,
    Question,
    Colon,
    Dollar,
    Eq,
    Bang,
    Lt,
    Gt,
    Minus,
    And,
    Or,
    Plus,
    Star,
    Slash,
    Caret,
    Percent,
    Unknown,
}

Enum representing common lexeme types.

Variants

LineComment

“// comment”

Fields

doc_style: Option<DocStyle>

BlockComment

/* block comment */

Block comments can be recursive, so the sequence like /* /* */ will not be considered terminated and will result in a parsing error.

Fields

doc_style: Option<DocStyle>

terminated: bool

Whitespace

Any whitespace characters sequence.

Ident

“ident” or “continue” At this step keywords are also considered identifiers.

RawIdent

“r#ident”

UnknownPrefix

An unknown prefix like foo#, foo', foo". Note that only the prefix (foo) is included in the token, not the separator (which is lexed as its own distinct token). In Rust 2021 and later, reserved prefixes are reported as errors; in earlier editions, they result in a (allowed by default) lint, and are treated as regular identifier tokens.

Literal

“12_u8”, “1.0e-40”, “b“123”“. See LiteralKind for more details.

Fields

kind: LiteralKind

suffix_start: usize

Lifetime

“’a”

Fields

starts_with_number: bool

Semi

“;”

Comma

“,”

Dot

“.”

OpenParen

“(”

CloseParen

“)”

OpenBrace

“{”

CloseBrace

“}”

OpenBracket

“[”

CloseBracket

“]”

At

“@”

Pound

“#”

Tilde

“~”

Question

“?”

Colon

“:”

Dollar

“$”

Eq

“=”

Bang

“!”

Lt

“<”

Gt

“>”

Minus

“-”

And

“&”

Or

“|”

Plus

“+”

Star

“*”

Slash

“/”

Caret

“^”

Percent

“%”

Unknown

Unknown token, not expected by the lexer, e.g. “№”

Trait Implementations

impl Clone for TokenKind

fn clone(&self) -> TokenKind

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for TokenKind

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

Formats the value using the given formatter.

impl Ord for TokenKind

fn cmp(&self, other: &TokenKind) -> 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 PartialEq for TokenKind

fn eq(&self, other: &TokenKind) -> 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 PartialOrd for TokenKind

fn partial_cmp(&self, other: &TokenKind) -> 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 Copy for TokenKind

impl Eq for TokenKind

impl StructuralPartialEq for TokenKind