rustc_attr_parsing/attributes/
path.rs

1use rustc_feature::{AttributeTemplate, template};
2use rustc_hir::attrs::AttributeKind;
3use rustc_span::{Symbol, sym};
4
5use crate::attributes::{AttributeOrder, OnDuplicate, SingleAttributeParser};
6use crate::context::{AcceptContext, Stage};
7use crate::parser::ArgParser;
8
9pub(crate) struct PathParser;
10
11impl<S: Stage> SingleAttributeParser<S> for PathParser {
12    const PATH: &[Symbol] = &[sym::path];
13    const ATTRIBUTE_ORDER: AttributeOrder = AttributeOrder::KeepOutermost;
14    const ON_DUPLICATE: OnDuplicate<S> = OnDuplicate::WarnButFutureError;
15    const TEMPLATE: AttributeTemplate = template!(
16        NameValueStr: "file",
17        "https://doc.rust-lang.org/reference/items/modules.html#the-path-attribute"
18    );
19
20    fn convert(cx: &mut AcceptContext<'_, '_, S>, args: &ArgParser<'_>) -> Option<AttributeKind> {
21        let Some(nv) = args.name_value() else {
22            cx.expected_name_value(cx.attr_span, None);
23            return None;
24        };
25        let Some(path) = nv.value_as_str() else {
26            cx.expected_string_literal(nv.value_span, Some(nv.value_as_lit()));
27            return None;
28        };
29
30        Some(AttributeKind::Path(path, cx.attr_span))
31    }
32}
rustc_attr_parsing/attributes/path.rs

rustc_attr_parsing/attributes/
path.rs
