1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51

#![allow(dead_code, unused_variables, unused_mut, unreachable_code)]
#![deny(warnings)]

macro_rules! set {
    () => ({ HashSet::new() });
    ($($elem:expr),*) => ({
        let mut s = HashSet::new();
        $(s.insert($elem);)*
        s
    })
}

mod automaton;
mod expression;
mod util;

pub mod encoding;
pub use automaton::Automaton;
pub use expression::Expression;

use std::fmt;
use std::ops::Range;

/// A set of input values for a state machine
pub trait Token : fmt::Debug {
    /// Convert the range to a token
    fn from_range(range: &Range<u32>) -> Self;

    /// Return a representation of the token as a range
    fn as_range(&self) -> Range<u32>;
}

pub trait Input<T: Token> {
    fn as_u32(&self) -> u32;
}

/// Used for compiling an expression
mod info {
    use std::ops;

    pub struct State {
        pub start: bool,
        pub terminal: bool,
        pub transitions: Vec<Transition>,
    }

    pub struct Transition {
        pub on: ops::Range<u32>,
        pub target: usize,
    }
}