rustc_attr_parsing/attributes/
test_attrs.rs

1use rustc_attr_data_structures::AttributeKind;
2use rustc_attr_data_structures::lints::AttributeLintKind;
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 IgnoreParser;
11
12impl<S: Stage> SingleAttributeParser<S> for IgnoreParser {
13    const PATH: &[Symbol] = &[sym::ignore];
14    const ATTRIBUTE_ORDER: AttributeOrder = AttributeOrder::KeepLast;
15    const ON_DUPLICATE: OnDuplicate<S> = OnDuplicate::Warn;
16    const TEMPLATE: AttributeTemplate = template!(Word, NameValueStr: "reason");
17
18    fn convert(cx: &mut AcceptContext<'_, '_, S>, args: &ArgParser<'_>) -> Option<AttributeKind> {
19        Some(AttributeKind::Ignore {
20            span: cx.attr_span,
21            reason: match args {
22                ArgParser::NoArgs => None,
23                ArgParser::NameValue(name_value) => {
24                    let Some(str_value) = name_value.value_as_str() else {
25                        let suggestions = <Self as SingleAttributeParser<S>>::TEMPLATE
26                            .suggestions(false, "ignore");
27                        let span = cx.attr_span;
28                        cx.emit_lint(
29                            AttributeLintKind::IllFormedAttributeInput { suggestions },
30                            span,
31                        );
32                        return None;
33                    };
34                    Some(str_value)
35                }
36                ArgParser::List(_) => {
37                    let suggestions =
38                        <Self as SingleAttributeParser<S>>::TEMPLATE.suggestions(false, "ignore");
39                    let span = cx.attr_span;
40                    cx.emit_lint(AttributeLintKind::IllFormedAttributeInput { suggestions }, span);
41                    return None;
42                }
43            },
44        })
45    }
46}
rustc_attr_parsing/attributes/test_attrs.rs

rustc_attr_parsing/attributes/
test_attrs.rs
