erl_tokenize
Erlang source code tokenizer written in Rust.
Documentation
Examples
Tokenizes the Erlang code io:format("Hello").
:
use erl_tokenize::{Tokenizer, TokenKind};
let src = r#"io:format("Hello")."#;
let tokenizer = Tokenizer::new(src);
let tokens = tokenizer.collect::<Result<Vec<_>, _>>().unwrap();
assert_eq!(tokens.iter().map(|t| t.kind()).collect::<Vec<_>>(),
[TokenKind::Atom, TokenKind::Symbol, TokenKind::Atom, TokenKind::Symbol,
TokenKind::String, TokenKind::Symbol, TokenKind::Symbol]);
assert_eq!(tokens.iter().map(|t| t.text()).collect::<Vec<_>>(),
["io", ":", "format", "(", r#""Hello""#, ")", "."]);
Executes the example tokenize
command:
$ cargo run --example tokenize -- /dev/stdin <<EOS
-module(foo).
-export([bar/0]).
bar() -> qux.
EOS
[line:1] Symbol(SymbolToken { value: Hyphen, text: "-" })
[line:1] Atom(AtomToken { value: "module", text: "module" })
[line:1] Symbol(SymbolToken { value: OpenParen, text: "(" })
[line:1] Atom(AtomToken { value: "foo", text: "foo" })
[line:1] Symbol(SymbolToken { value: CloseParen, text: ")" })
[line:1] Symbol(SymbolToken { value: Dot, text: "." })
[line:1] Whitespace(WhitespaceToken { value: Newline, text: "\n" })
[line:2] Whitespace(WhitespaceToken { value: Newline, text: "\n" })
[line:3] Symbol(SymbolToken { value: Hyphen, text: "-" })
[line:3] Atom(AtomToken { value: "export", text: "export" })
[line:3] Symbol(SymbolToken { value: OpenParen, text: "(" })
[line:3] Symbol(SymbolToken { value: OpenSquare, text: "[" })
[line:3] Atom(AtomToken { value: "bar", text: "bar" })
[line:3] Symbol(SymbolToken { value: Slash, text: "/" })
[line:3] Integer(IntegerToken { value: BigUint { data: [] }, text: "0" })
[line:3] Symbol(SymbolToken { value: CloseSquare, text: "]" })
[line:3] Symbol(SymbolToken { value: CloseParen, text: ")" })
[line:3] Symbol(SymbolToken { value: Dot, text: "." })
[line:3] Whitespace(WhitespaceToken { value: Newline, text: "\n" })
[line:4] Whitespace(WhitespaceToken { value: Newline, text: "\n" })
[line:5] Atom(AtomToken { value: "bar", text: "bar" })
[line:5] Symbol(SymbolToken { value: OpenParen, text: "(" })
[line:5] Symbol(SymbolToken { value: CloseParen, text: ")" })
[line:5] Whitespace(WhitespaceToken { value: Space, text: " " })
[line:5] Symbol(SymbolToken { value: RightAllow, text: "->" })
[line:5] Whitespace(WhitespaceToken { value: Space, text: " " })
[line:5] Atom(AtomToken { value: "qux", text: "qux" })
[line:5] Symbol(SymbolToken { value: Dot, text: "." })
[line:5] Whitespace(WhitespaceToken { value: Newline, text: "\n" })
References