aldrin_parser/ast/
named_ref.rs

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
use super::{Ident, SchemaName};
use crate::error::MissingImport;
use crate::grammar::Rule;
use crate::validate::Validate;
use crate::Span;
use pest::iterators::Pair;

#[derive(Debug, Clone)]
pub struct NamedRef {
    span: Span,
    kind: NamedRefKind,
}

impl NamedRef {
    pub(crate) fn parse(pair: Pair<Rule>) -> Self {
        assert_eq!(pair.as_rule(), Rule::named_ref);

        let span = Span::from_pair(&pair);

        let mut pairs = pair.into_inner();
        let pair = pairs.next().unwrap();
        let kind = NamedRefKind::parse(pair);

        Self { span, kind }
    }

    pub(crate) fn validate(&self, validate: &mut Validate) {
        self.kind.validate(validate);
    }

    pub fn span(&self) -> Span {
        self.span
    }

    pub fn kind(&self) -> &NamedRefKind {
        &self.kind
    }

    pub fn schema(&self) -> Option<&SchemaName> {
        self.kind.schema()
    }

    pub fn ident(&self) -> &Ident {
        self.kind.ident()
    }
}

#[derive(Debug, Clone)]
pub enum NamedRefKind {
    Intern(Ident),
    Extern(SchemaName, Ident),
}

impl NamedRefKind {
    fn parse(pair: Pair<Rule>) -> Self {
        match pair.as_rule() {
            Rule::ident => Self::Intern(Ident::parse(pair)),

            Rule::external_ref => {
                let mut pairs = pair.into_inner();
                let pair = pairs.next().unwrap();
                let schema_name = SchemaName::parse(pair);
                pairs.next().unwrap(); // Skip ::.
                let ident = Ident::parse(pairs.next().unwrap());

                Self::Extern(schema_name, ident)
            }

            _ => unreachable!(),
        }
    }

    fn validate(&self, validate: &mut Validate) {
        match self {
            Self::Intern(_) => {}

            Self::Extern(schema, _) => {
                MissingImport::validate(schema, validate);
            }
        }
    }

    pub fn schema(&self) -> Option<&SchemaName> {
        match self {
            Self::Intern(_) => None,
            Self::Extern(schema, _) => Some(schema),
        }
    }

    pub fn ident(&self) -> &Ident {
        match self {
            Self::Intern(ident) => ident,
            Self::Extern(_, ident) => ident,
        }
    }
}