rustc_attr_parsing/attributes/
path.rs

1use super::prelude::*;
2
3pub(crate) struct PathParser;
4
5impl<S: Stage> SingleAttributeParser<S> for PathParser {
6    const PATH: &[Symbol] = &[sym::path];
7    const ATTRIBUTE_ORDER: AttributeOrder = AttributeOrder::KeepOutermost;
8    const ON_DUPLICATE: OnDuplicate<S> = OnDuplicate::WarnButFutureError;
9    const ALLOWED_TARGETS: AllowedTargets =
10        AllowedTargets::AllowListWarnRest(&[Allow(Target::Mod), Error(Target::Crate)]);
11    const TEMPLATE: AttributeTemplate = template!(
12        NameValueStr: "file",
13        "https://doc.rust-lang.org/reference/items/modules.html#the-path-attribute"
14    );
15
16    fn convert(cx: &mut AcceptContext<'_, '_, S>, args: &ArgParser<'_>) -> Option<AttributeKind> {
17        let Some(nv) = args.name_value() else {
18            cx.expected_name_value(cx.attr_span, None);
19            return None;
20        };
21        let Some(path) = nv.value_as_str() else {
22            cx.expected_string_literal(nv.value_span, Some(nv.value_as_lit()));
23            return None;
24        };
25
26        Some(AttributeKind::Path(path, cx.attr_span))
27    }
28}
rustc_attr_parsing/attributes/path.rs

rustc_attr_parsing/attributes/
path.rs
