valkyrie-ast 0.1.4

Strong typed abstract syntax tree of valkyrie language
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

use super::*;
use pretty_print::PrettyBuilder;

impl PrettyPrint for PatternBranch {
    fn pretty(&self, theme: &PrettyProvider) -> PrettyTree {
        theme.concat(&[self.condition.pretty(theme), self.statements.pretty(theme)])
    }
}

impl PrettyPrint for PatternCondition {
    fn pretty(&self, theme: &PrettyProvider) -> PrettyTree {
        let item = match self {
            Self::Case(v) => v.pretty(theme),
            Self::When(v) => v.pretty(theme),
            Self::Type(v) => v.pretty(theme),
            Self::Else(v) => v.pretty(theme),
        };
        item.append(":").append(PrettyTree::Hardline)
    }
}

impl PrettyPrint for PatternStatements {
    fn pretty(&self, theme: &PrettyProvider) -> PrettyTree {
        let mut terms = PrettySequence::new(self.terms.len() * 2);
        let len = self.terms.len();
        for (idx, term) in self.terms.iter().enumerate() {
            terms += term.pretty(theme);
            if idx == len.saturating_sub(1) {
                terms += ",";
            }
        }
        terms.indent(4)
    }
}

impl PrettyPrint for ImplicitCaseNode {
    fn pretty(&self, theme: &PrettyProvider) -> PrettyTree {
        let mut terms = PrettySequence::new(10);
        terms += self.pattern.pretty(theme);
        terms += theme.keyword("≔");
        terms += self.body.pretty(theme);
        terms.into()
    }
}

impl PrettyPrint for PatternCaseNode {
    fn pretty(&self, theme: &PrettyProvider) -> PrettyTree {
        let mut terms = PrettySequence::new(5);
        terms += theme.keyword("case");
        terms += " ";
        terms += self.pattern.pretty(theme);
        if let Some(guard) = &self.guard {
            terms += theme.keyword("when");
            terms += guard.pretty(theme);
        }
        terms.into()
    }
}

impl PrettyPrint for PatternWhenNode {
    fn pretty(&self, theme: &PrettyProvider) -> PrettyTree {
        theme.concat(&[theme.keyword("when"), " ".into(), self.guard.pretty(theme)])
    }
}

impl PrettyPrint for PatternTypeNode {
    fn pretty(&self, theme: &PrettyProvider) -> PrettyTree {
        theme.concat(&[theme.keyword("type"), " ".into(), self.pattern.pretty(theme)])
    }
}

impl PrettyPrint for PatternElseNode {
    fn pretty(&self, theme: &PrettyProvider) -> PrettyTree {
        theme.keyword("else")
    }
}