bluejay_parser/ast/
directives.rs

1use crate::{
2    ast::{DepthLimiter, Directive, FromTokens, IsMatch, ParseError, Tokens, TryFromTokens},
3    HasSpan, Span,
4};
5use bluejay_core::AsIter;
6
7#[derive(Debug)]
8pub struct Directives<'a, const CONST: bool> {
9    directives: Vec<Directive<'a, CONST>>,
10    span: Option<Span>,
11}
12
13pub type ConstDirectives<'a> = Directives<'a, true>;
14pub type VariableDirectives<'a> = Directives<'a, false>;
15
16impl<'a, const CONST: bool> FromTokens<'a> for Directives<'a, CONST> {
17    #[inline]
18    fn from_tokens(
19        tokens: &mut impl Tokens<'a>,
20        depth_limiter: DepthLimiter,
21    ) -> Result<Self, ParseError> {
22        let mut directives: Vec<Directive<'a, CONST>> = Vec::new();
23        while let Some(directive) = Directive::try_from_tokens(tokens, depth_limiter.bump()?) {
24            directives.push(directive?);
25        }
26        let span = match directives.as_slice() {
27            [] => None,
28            [first] => Some(first.span().clone()),
29            [first, .., last] => Some(first.span().merge(last.span())),
30        };
31        Ok(Self { directives, span })
32    }
33}
34
35impl<'a, const CONST: bool> IsMatch<'a> for Directives<'a, CONST> {
36    #[inline]
37    fn is_match(tokens: &mut impl Tokens<'a>) -> bool {
38        Directive::<'a, CONST>::is_match(tokens)
39    }
40}
41
42impl<'a, const CONST: bool> bluejay_core::Directives<CONST> for Directives<'a, CONST> {
43    type Directive = Directive<'a, CONST>;
44}
45
46impl<'a, const CONST: bool> AsIter for Directives<'a, CONST> {
47    type Item = Directive<'a, CONST>;
48    type Iterator<'b>
49        = std::slice::Iter<'b, Self::Item>
50    where
51        'a: 'b;
52
53    fn iter(&self) -> Self::Iterator<'_> {
54        self.directives.iter()
55    }
56}
57
58impl<const CONST: bool> Directives<'_, CONST> {
59    pub(crate) fn span(&self) -> Option<&Span> {
60        self.span.as_ref()
61    }
62}
63
64impl<'a, const CONST: bool> IntoIterator for Directives<'a, CONST> {
65    type Item = Directive<'a, CONST>;
66    type IntoIter = std::vec::IntoIter<Self::Item>;
67
68    fn into_iter(self) -> Self::IntoIter {
69        self.directives.into_iter()
70    }
71}
bluejay_parser/ast/directives.rs

bluejay_parser/ast/
directives.rs
