Enum rustc_lexer::TokenKind [−][src]
pub enum TokenKind {
Show 36 variants
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,
}Expand description
Enum representing common lexeme types.
Variants
“// comment”
/* block comment */
Block comments can be recursive, so the sequence like /* /* */
will not be considered terminated and will result in a parsing error.
Any whitespace characters sequence.
“ident” or “continue” At this step keywords are also considered identifiers.
“r#ident”
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.
“12_u8”, “1.0e-40”, “b“123”“. See LiteralKind for more details.
Fields of Literal
kind: LiteralKindsuffix_start: usize“’a”
Fields of Lifetime
starts_with_number: bool“;”
“,”
“.”
“(”
“)”
“{”
“}”
“[”
“]”
“@”
“#”
“~”
“?”
“:”
“$”
“=”
“!”
“<”
“>”
“-”
“&”
“|”
“+”
“*”
“/”
“^”
“%”
Unknown token, not expected by the lexer, e.g. “№”
Trait Implementations
This method returns an ordering between self and other values if one exists. Read more
This method tests less than (for self and other) and is used by the < operator. Read more
This method tests less than or equal to (for self and other) and is used by the <=
operator. Read more
This method tests greater than (for self and other) and is used by the > operator. Read more
Auto Trait Implementations
impl RefUnwindSafe for TokenKind
impl UnwindSafe for TokenKind
Blanket Implementations
Mutably borrows from an owned value. Read more
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: 64 bytes
Size for each variant:
LineComment: 1 byteBlockComment: 2 bytesWhitespace: 0 bytesIdent: 0 bytesRawIdent: 0 bytesUnknownPrefix: 0 bytesLiteral: 63 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