rustc_attr_parsing/attributes/
confusables.rs

1use rustc_feature::AttributeStability;
2
3use super::prelude::*;
4use crate::session_diagnostics::EmptyConfusables;
5
6#[derive(#[automatically_derived]
impl ::core::default::Default for ConfusablesParser {
    #[inline]
    fn default() -> ConfusablesParser {
        ConfusablesParser {
            confusables: ::core::default::Default::default(),
            first_span: ::core::default::Default::default(),
        }
    }
}Default)]
7pub(crate) struct ConfusablesParser {
8    confusables: ThinVec<Symbol>,
9    first_span: Option<Span>,
10}
11
12impl AttributeParser for ConfusablesParser {
13    const ATTRIBUTES: AcceptMapping<Self> = &[(
14        &[sym::rustc_confusables],
15        ::rustc_feature::AttributeTemplate {
    word: false,
    list: Some(&[r#""name1", "name2", ..."#]),
    one_of: &[],
    name_value_str: None,
    docs: None,
}template!(List: &[r#""name1", "name2", ..."#]),
16        AttributeStability::Unstable {
    gate_name: rustc_span::sym::rustc_attrs,
    gate_check: rustc_feature::Features::rustc_attrs,
    notes: &[],
}unstable!(rustc_attrs),
17        |this, cx, args| {
18            let Some(list) = cx.expect_list(args, cx.attr_span) else { return };
19
20            if list.is_empty() {
21                cx.emit_err(EmptyConfusables { span: cx.attr_span });
22            }
23
24            for param in list.mixed() {
25                let Some(lit) = cx.expect_string_literal(param) else {
26                    continue;
27                };
28
29                this.confusables.push(lit);
30            }
31
32            this.first_span.get_or_insert(cx.attr_span);
33        },
34    )];
35    const ALLOWED_TARGETS: AllowedTargets =
36        AllowedTargets::AllowList(&[Allow(Target::Method(MethodKind::Inherent))]);
37
38    fn finalize(self, _cx: &FinalizeContext<'_, '_>) -> Option<AttributeKind> {
39        if self.confusables.is_empty() {
40            return None;
41        }
42
43        Some(AttributeKind::RustcConfusables { confusables: self.confusables })
44    }
45}
rustc_attr_parsing/attributes/confusables.rs

rustc_attr_parsing/attributes/
confusables.rs
