hoars 0.2.0

A library for dealing with the HOA (Hanoi Omega Automata) file format.
Documentation 
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
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157

use std::collections::{HashMap, HashSet};

use crate::{Id, LabelExpression};

#[derive(Debug, Eq, PartialEq, Clone, Hash)]
enum Val {
    True,
    False,
    Undecided,
}

impl std::ops::BitOr for Val {
    type Output = Self;

    fn bitor(self, rhs: Self) -> Self::Output {
        match (self, rhs) {
            (Val::True, _) | (_, Val::True) => Val::True,
            (Val::False, Val::False) => Val::False,
            _ => Val::Undecided,
        }
    }
}

impl std::ops::BitAnd for Val {
    type Output = Self;

    fn bitand(self, rhs: Self) -> Self::Output {
        match (self, rhs) {
            (Val::False, _) | (_, Val::False) => Val::False,
            (Val::True, Val::True) => Val::True,
            _ => Val::Undecided,
        }
    }
}

impl std::ops::Not for Val {
    type Output = Self;

    fn not(self) -> Self::Output {
        match self {
            Val::True => Val::False,
            Val::False => Val::True,
            Val::Undecided => Val::Undecided,
        }
    }
}

#[derive(Debug, Eq, PartialEq, Clone)]
pub struct Interpretation {
    default: Val,
    map: HashMap<Id, Val>,
}

impl Interpretation {
    pub(crate) fn top() -> Self {
        Interpretation {
            default: Val::True,
            pos: HashSet::new(),
            neg: HashSet::new(),
        }
    }

    pub(crate) fn bot() -> Self {
        Interpretation {
            default: Val::False,
            pos: HashSet::new(),
            neg: HashSet::new(),
        }
    }

    pub(crate) fn just(id: Id) -> Self {
        Interpretation {
            default: Val::Undecided,
            pos: vec![id].into_iter().collect(),
            neg: HashSet::new(),
        }
    }
}

impl std::ops::BitOr for Interpretation {
    type Output = Self;

    fn bitor(self, rhs: Self) -> Self::Output {
        Interpretation {
            pos: self.pos.intersection(&rhs.pos).cloned().collect(),
            neg: self.neg.union(&rhs.neg).cloned().collect(),
            default: self.default | rhs.default,
        }
    }
}

impl std::ops::BitAnd for Interpretation {
    type Output = Self;

    fn bitand(self, rhs: Self) -> Self::Output {
        Interpretation {
            pos: self.pos.union(&rhs.pos).cloned().collect(),
            neg: self.neg.intersection(&rhs.neg).cloned().collect(),
            default: self.default & rhs.default,
        }
    }
}

impl std::ops::Not for Interpretation {
    type Output = Self;

    fn not(self) -> Self::Output {
        Interpretation {
            pos: self.neg,
            neg: self.pos,
            default: !self.default,
        }
    }
}

impl From<&LabelExpression> for Interpretation {
    fn from(expression: &LabelExpression) -> Self {
        match expression {
            LabelExpression::Boolean(b) => {
                if *b {
                    Interpretation::top()
                } else {
                    Interpretation::bot()
                }
            }
            LabelExpression::Integer(n) => Interpretation::just(*n),
            LabelExpression::Alias(_) => unimplemented!(),
            LabelExpression::Not(subexpr) => !Interpretation::from(subexpr.as_ref()),
            LabelExpression::And(l, r) => {
                Interpretation::from(l.as_ref()) & Interpretation::from(r.as_ref())
            }
            LabelExpression::Or(l, r) => {
                Interpretation::from(l.as_ref()) | Interpretation::from(r.as_ref())
            }
        }
    }
}

#[cfg(test)]
mod tests {
    use crate::LabelExpression;

    use super::Interpretation;

    #[test]
    fn label_expr_to_interpretation() {
        let expr = LabelExpression::And(
            Box::new(LabelExpression::Or(
                Box::new(LabelExpression::Integer(1)),
                Box::new(LabelExpression::Boolean(false)),
            )),
            Box::new(LabelExpression::Integer(2)),
        );
        let interpretation = Interpretation::from(&expr);
        println!("{:?}", interpretation);
    }
}