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use super::prelude::*;
pub(crate) struct PathParser;
impl<S: Stage> SingleAttributeParser<S> for PathParser {
const PATH: &[Symbol] = &[sym::path];
const ATTRIBUTE_ORDER: AttributeOrder = AttributeOrder::KeepOutermost;
const ON_DUPLICATE: OnDuplicate<S> = OnDuplicate::WarnButFutureError;
const ALLOWED_TARGETS: AllowedTargets =
AllowedTargets::AllowListWarnRest(&[Allow(Target::Mod), Error(Target::Crate)]);
const TEMPLATE: AttributeTemplate = template!(
NameValueStr: "file",
"https://doc.rust-lang.org/reference/items/modules.html#the-path-attribute"
);
fn convert(cx: &mut AcceptContext<'_, '_, S>, args: &ArgParser<'_>) -> Option<AttributeKind> {
let Some(nv) = args.name_value() else {
cx.expected_name_value(cx.attr_span, None);
return None;
};
let Some(path) = nv.value_as_str() else {
cx.expected_string_literal(nv.value_span, Some(nv.value_as_lit()));
return None;
};
Some(AttributeKind::Path(path, cx.attr_span))
}
}
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