Enum rustc_lexer::TokenKind
source · pub enum TokenKind {
Show 37 variants
LineComment {
doc_style: Option<DocStyle>,
},
BlockComment {
doc_style: Option<DocStyle>,
terminated: bool,
},
Whitespace,
Ident,
InvalidIdent,
RawIdent,
UnknownPrefix,
Literal {
kind: LiteralKind,
suffix_start: u32,
},
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,
}
Expand description
Enum representing common lexeme types.
Variants
LineComment
“// comment”
BlockComment
/* block comment */
Block comments can be recursive, so the sequence like /* /* */
will not be considered terminated and will result in a parsing error.
Whitespace
Any whitespace characters sequence.
Ident
“ident” or “continue” At this step keywords are also considered identifiers.
InvalidIdent
Like the above, but containing invalid unicode codepoints.
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.
Lifetime
Fields
starts_with_number: bool
“’a”
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 Copy for TokenKind
impl Eq for TokenKind
impl StructuralEq for TokenKind
impl StructuralPartialEq for TokenKind
Auto Trait Implementations
impl RefUnwindSafe for TokenKind
impl Send for TokenKind
impl Sync for TokenKind
impl Unpin for TokenKind
impl UnwindSafe for TokenKind
Blanket Implementations
sourceimpl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Layout
Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...)
attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.
Size: 8 bytes
Size for each variant:
LineComment
: 1 byteBlockComment
: 2 bytesWhitespace
: 0 bytesIdent
: 0 bytesInvalidIdent
: 0 bytesRawIdent
: 0 bytesUnknownPrefix
: 0 bytesLiteral
: 7 bytesLifetime
: 1 byteSemi
: 0 bytesComma
: 0 bytesDot
: 0 bytesOpenParen
: 0 bytesCloseParen
: 0 bytesOpenBrace
: 0 bytesCloseBrace
: 0 bytesOpenBracket
: 0 bytesCloseBracket
: 0 bytesAt
: 0 bytesPound
: 0 bytesTilde
: 0 bytesQuestion
: 0 bytesColon
: 0 bytesDollar
: 0 bytesEq
: 0 bytesBang
: 0 bytesLt
: 0 bytesGt
: 0 bytesMinus
: 0 bytesAnd
: 0 bytesOr
: 0 bytesPlus
: 0 bytesStar
: 0 bytesSlash
: 0 bytesCaret
: 0 bytesPercent
: 0 bytesUnknown
: 0 bytes