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January 16, 2023 14:08
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My lexer in logos#277
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use logos::Logos; | |
#[derive(Logos, PartialEq, Eq, Debug)] | |
pub enum Token<'a> { | |
#[regex(r"-?[0-9][0-9_]*(\.[0-9_]+)?([eE][\+-][0-9_]+)?([fui][0-9]+)?")] | |
Number(&'a str), | |
#[regex(r#""(\\.|[^"\\])*""#, |lex| &lex.slice()[1..lex.slice().len() - 1])] | |
#[regex(r#"#(\\.|[^#\\])*#"#, |lex| &lex.slice()[1..lex.slice().len() - 1])] | |
String(&'a str), | |
#[regex(r"'(\\.|[^'\\])'", |lex| lex.slice().chars().nth(1).unwrap())] | |
Char(char), | |
#[regex(r"///[^\n]*", |lex| lex.slice()[3..].trim())] | |
#[regex(r"/\*\*([^\*]|\*[^\*/]|\*\*[^/])*\*?\*/", |lex| lex.slice()[3..lex.slice().len() - 3].trim())] | |
Doc(&'a str), | |
#[regex(r"//[^\n]*", logos::skip)] | |
#[regex(r"/\*([^\*]|\*[^/])*\*/", logos::skip)] | |
Comment, | |
#[regex(r"#\[.+\]", |lex| &lex.slice()[2..lex.slice().len() - 1])] | |
Attrib(&'a str), | |
#[regex(r"[a-zA-Z_][a-zA-Z0-9_]*", |lex| lex.slice())] | |
Ident(&'a str), | |
#[token("(")] | |
LeftParen, | |
#[token(")")] | |
RightParen, | |
#[token("[")] | |
LeftBracket, | |
#[token("]")] | |
RightBracket, | |
#[token("{")] | |
LeftBrace, | |
#[token("}")] | |
RightBrace, | |
#[token(",")] | |
Comma, | |
#[token(".")] | |
Dot, | |
#[token(":")] | |
Colon, | |
#[token(";")] | |
Semicolon, | |
#[token("+")] | |
Plus, | |
#[token("-")] | |
Minus, | |
#[token("*")] | |
Star, | |
#[token("/")] | |
Slash, | |
#[token("%")] | |
Percent, | |
#[token("&")] | |
And, | |
#[token("|")] | |
Or, | |
#[token("^")] | |
Xor, | |
#[token("==")] | |
EqEq, | |
#[token("!=")] | |
BangEq, | |
#[token("<")] | |
Lt, | |
#[token("<=")] | |
LtEq, | |
#[token(">")] | |
Gt, | |
#[token(">=")] | |
GtEq, | |
#[token("&&")] | |
AndAnd, | |
#[token("||")] | |
OrOr, | |
#[token("!")] | |
Bang, | |
#[token(":=")] | |
ColonEq, | |
#[token("=>")] | |
FatArrow, | |
#[token("->")] | |
ThinArrow, | |
#[token("..")] | |
Ellipsis, | |
#[token("<<")] | |
LtLt, | |
#[token(">>")] | |
GtGt, | |
#[token("<<=")] | |
LtLtEq, | |
#[token(">>=")] | |
GtGtEq, | |
#[token("+=")] | |
PlusEq, | |
#[token("-=")] | |
MinusEq, | |
#[token("*=")] | |
StarEq, | |
#[token("/=")] | |
SlashEq, | |
#[token("%=")] | |
PercentEq, | |
#[token("&=")] | |
AndEq, | |
#[token("|=")] | |
OrEq, | |
#[token("^=")] | |
XorEq, | |
#[regex("(true|false)", |lex| lex.slice().parse())] | |
Bool(bool), | |
#[token("if")] | |
If, | |
#[token("else")] | |
Else, | |
#[token("while")] | |
While, | |
#[token("for")] | |
For, | |
#[token("in")] | |
In, | |
#[token("break")] | |
Break, | |
#[token("continue")] | |
Continue, | |
#[token("return")] | |
Return, | |
#[token("let")] | |
Let, | |
#[token("mut")] | |
Mut, | |
#[token("own")] | |
Own, | |
#[token("const")] | |
Const, | |
#[token("fn")] | |
Fn, | |
#[token("struct")] | |
Struct, | |
#[token("enum")] | |
Enum, | |
#[token("impl")] | |
Impl, | |
#[token("trait")] | |
Trait, | |
#[token("type")] | |
Type, | |
#[token("use")] | |
Use, | |
#[token("mod")] | |
Mod, | |
#[token("pub")] | |
Pub, | |
#[token("extern")] | |
Extern, | |
#[token("crate")] | |
Crate, | |
#[token("self")] | |
Self_, | |
#[token("super")] | |
Super, | |
#[token("as")] | |
As, | |
#[token("where")] | |
Where, | |
#[token("match")] | |
Match, | |
#[token("async")] | |
Async, | |
#[token("await")] | |
Await, | |
#[token("box")] | |
Box, | |
#[token("dyn")] | |
Dyn, | |
#[token("static")] | |
Static, | |
#[token("union")] | |
Union, | |
#[token("unsafe")] | |
Unsafe, | |
#[token("abstract")] | |
Macro, | |
#[token("override")] | |
#[error] | |
#[regex(r"[ \t\n\f]+", logos::skip)] | |
Error, | |
} |
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