erl_tokenize

erl_tokenize Documentation Build Status License: MIT

Erlang source code tokenizer written in Rust.

Documentation

Examples

Tokenizes the Erlang code io:format("Hello").:

```rust use erl_tokenize::{Tokenizer, TokenKind};

let src = r#"io:format("Hello")."#; let tokenizer = Tokenizer::new(src); let tokens = tokenizer.collect::, _>>().unwrap();

assert_eq!(tokens.iter().map(|t| t.kind()).collect::>(), [TokenKind::Atom, TokenKind::Symbol, TokenKind::Atom, TokenKind::Symbol, TokenKind::String, TokenKind::Symbol, TokenKind::Symbol]);

assert_eq!(tokens.iter().map(|t| t.text()).collect::>(), ["io", ":", "format", "(", r#""Hello""#, ")", "."]); ```

Executes the example tokenize command:

```bash $ cargo run --example tokenize -- /dev/stdin <

-export([bar/0]).

bar() -> qux. EOS

[Position { filepath: None, offset: 0, line: 1, column: 1 }] Symbol(Hyphen) [Position { filepath: None, offset: 1, line: 1, column: 2 }] Atom("module") [Position { filepath: None, offset: 7, line: 1, column: 8 }] Symbol(OpenParen) [Position { filepath: None, offset: 8, line: 1, column: 9 }] Atom("foo") [Position { filepath: None, offset: 11, line: 1, column: 12 }] Symbol(CloseParen) [Position { filepath: None, offset: 12, line: 1, column: 13 }] Symbol(Dot) [Position { filepath: None, offset: 13, line: 1, column: 14 }] Whitespace(Newline) [Position { filepath: None, offset: 14, line: 2, column: 1 }] Whitespace(Newline) [Position { filepath: None, offset: 15, line: 3, column: 1 }] Symbol(Hyphen) [Position { filepath: None, offset: 16, line: 3, column: 2 }] Atom("export") [Position { filepath: None, offset: 22, line: 3, column: 8 }] Symbol(OpenParen) [Position { filepath: None, offset: 23, line: 3, column: 9 }] Symbol(OpenSquare) [Position { filepath: None, offset: 24, line: 3, column: 10 }] Atom("bar") [Position { filepath: None, offset: 27, line: 3, column: 13 }] Symbol(Slash) [Position { filepath: None, offset: 28, line: 3, column: 14 }] Integer(BigUint { data: [] }) [Position { filepath: None, offset: 29, line: 3, column: 15 }] Symbol(CloseSquare) [Position { filepath: None, offset: 30, line: 3, column: 16 }] Symbol(CloseParen) [Position { filepath: None, offset: 31, line: 3, column: 17 }] Symbol(Dot) [Position { filepath: None, offset: 32, line: 3, column: 18 }] Whitespace(Newline) [Position { filepath: None, offset: 33, line: 4, column: 1 }] Whitespace(Newline) [Position { filepath: None, offset: 34, line: 5, column: 1 }] Atom("bar") [Position { filepath: None, offset: 37, line: 5, column: 4 }] Symbol(OpenParen) [Position { filepath: None, offset: 38, line: 5, column: 5 }] Symbol(CloseParen) [Position { filepath: None, offset: 39, line: 5, column: 6 }] Whitespace(Space) [Position { filepath: None, offset: 40, line: 5, column: 7 }] Symbol(RightArrow) [Position { filepath: None, offset: 42, line: 5, column: 9 }] Whitespace(Space) [Position { filepath: None, offset: 43, line: 5, column: 10 }] Atom("qux") [Position { filepath: None, offset: 46, line: 5, column: 13 }] Symbol(Dot) [Position { filepath: None, offset: 47, line: 5, column: 14 }] Whitespace(Newline) TOKEN COUNT: 29 ELAPSED: 0.007222 seconds ```

References