rustc_attr_parsing/attributes/link_attrs.rs
1use rustc_attr_data_structures::AttributeKind;
2use rustc_attr_data_structures::AttributeKind::LinkName;
3use rustc_feature::{AttributeTemplate, template};
4use rustc_span::{Symbol, sym};
5
6use crate::attributes::{AttributeOrder, OnDuplicate, SingleAttributeParser};
7use crate::context::{AcceptContext, Stage};
8use crate::parser::ArgParser;
9
10pub(crate) struct LinkNameParser;
11
12impl<S: Stage> SingleAttributeParser<S> for LinkNameParser {
13 const PATH: &[Symbol] = &[sym::link_name];
14 const ATTRIBUTE_ORDER: AttributeOrder = AttributeOrder::KeepFirst;
15 const ON_DUPLICATE: OnDuplicate<S> = OnDuplicate::WarnButFutureError;
16 const TEMPLATE: AttributeTemplate = template!(NameValueStr: "name");
17
18 fn convert(cx: &mut AcceptContext<'_, '_, S>, args: &ArgParser<'_>) -> Option<AttributeKind> {
19 let Some(nv) = args.name_value() else {
20 cx.expected_name_value(cx.attr_span, None);
21 return None;
22 };
23 let Some(name) = nv.value_as_str() else {
24 cx.expected_string_literal(nv.value_span, Some(nv.value_as_lit()));
25 return None;
26 };
27
28 Some(LinkName { name, span: cx.attr_span })
29 }
30}