oxc_css_parser/parser/at_rule/
layer.rs

1use super::Parser;
2use crate::{
3    Parse, arena_vec,
4    ast::*,
5    bump, eat,
6    error::{Error, PResult},
7    peek,
8    pos::{Span, Spanned},
9    tokenizer::{Token, TokenWithSpan},
10    util,
11};
12
13// https://drafts.csswg.org/css-cascade-5/#layering
14impl<'a> Parse<'a> for LayerNames<'a> {
15    fn parse(input: &mut Parser<'a>) -> PResult<Self> {
16        let first = input.parse::<LayerName>()?;
17        let mut span = first.span.clone();
18
19        let mut names = arena_vec!(input; first);
20        let mut comma_spans = arena_vec!(input);
21        while let Some((_, comma_span)) = eat!(input, Comma) {
22            comma_spans.push(comma_span);
23            names.push(input.parse()?);
24        }
25
26        if let Some(last) = names.last() {
27            span.end = last.span.end;
28        }
29        Ok(LayerNames { names, comma_spans, span })
30    }
31}
32
33// https://drafts.csswg.org/css-cascade-5/#layer-names
34impl<'a> Parse<'a> for LayerName<'a> {
35    fn parse(input: &mut Parser<'a>) -> PResult<Self> {
36        let first = input.parse::<InterpolableIdent>()?;
37        let start = first.span().start;
38        let mut end = first.span().end;
39
40        let mut idents = arena_vec!(input; first);
41        while let TokenWithSpan { token: Token::Dot(..), span } = peek!(input) {
42            if span.start == end {
43                let span = bump!(input).span;
44                let ident = input.parse::<InterpolableIdent>()?;
45                util::assert_no_ws_or_comment(&span, ident.span())?;
46                end = ident.span().end;
47                idents.push(ident);
48            } else {
49                break;
50            }
51        }
52
53        let invalid_ident = idents.iter().find(|ident| match &ident {
54            InterpolableIdent::Literal(ident) => util::is_css_wide_keyword(ident.name),
55            _ => false,
56        });
57        if let Some(invalid_ident) = invalid_ident {
58            input.recoverable_errors.push(Error {
59                kind: crate::error::ErrorKind::CSSWideKeywordDisallowed,
60                span: invalid_ident.span().clone(),
61            });
62        }
63
64        let span = Span { start, end };
65        Ok(LayerName { idents, span })
66    }
67}
oxc_css_parser/parser/at_rule/layer.rs

oxc_css_parser/parser/at_rule/
layer.rs
