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use rustc_feature::{AttributeTemplate, template};
use rustc_hir::attrs::AttributeKind;
use rustc_hir::lints::AttributeLintKind;
use rustc_span::{Symbol, sym};
use crate::attributes::{AttributeOrder, OnDuplicate, SingleAttributeParser};
use crate::context::{AcceptContext, Stage};
use crate::parser::ArgParser;
pub(crate) struct IgnoreParser;
impl<S: Stage> SingleAttributeParser<S> for IgnoreParser {
const PATH: &[Symbol] = &[sym::ignore];
const ATTRIBUTE_ORDER: AttributeOrder = AttributeOrder::KeepOutermost;
const ON_DUPLICATE: OnDuplicate<S> = OnDuplicate::Warn;
const TEMPLATE: AttributeTemplate = template!(Word, NameValueStr: "reason");
fn convert(cx: &mut AcceptContext<'_, '_, S>, args: &ArgParser<'_>) -> Option<AttributeKind> {
Some(AttributeKind::Ignore {
span: cx.attr_span,
reason: match args {
ArgParser::NoArgs => None,
ArgParser::NameValue(name_value) => {
let Some(str_value) = name_value.value_as_str() else {
let suggestions = <Self as SingleAttributeParser<S>>::TEMPLATE
.suggestions(false, "ignore");
let span = cx.attr_span;
cx.emit_lint(
AttributeLintKind::IllFormedAttributeInput { suggestions },
span,
);
return None;
};
Some(str_value)
}
ArgParser::List(_) => {
let suggestions =
<Self as SingleAttributeParser<S>>::TEMPLATE.suggestions(false, "ignore");
let span = cx.attr_span;
cx.emit_lint(AttributeLintKind::IllFormedAttributeInput { suggestions }, span);
return None;
}
},
})
}
}
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