rustc_attr_parsing/attributes/
cfi_encoding.rs

1use super::prelude::*;
2pub(crate) struct CfiEncodingParser;
3impl<S: Stage> SingleAttributeParser<S> for CfiEncodingParser {
4    const PATH: &[Symbol] = &[sym::cfi_encoding];
5    const ALLOWED_TARGETS: AllowedTargets = AllowedTargets::AllowListWarnRest(&[
6        Allow(Target::Struct),
7        Allow(Target::ForeignTy),
8        Allow(Target::Enum),
9        Allow(Target::Union),
10    ]);
11    const ATTRIBUTE_ORDER: AttributeOrder = AttributeOrder::KeepInnermost;
12    const ON_DUPLICATE: OnDuplicate<S> = OnDuplicate::Error;
13    const TEMPLATE: AttributeTemplate = template!(NameValueStr: "encoding");
14
15    fn convert(cx: &mut AcceptContext<'_, '_, S>, args: &ArgParser) -> Option<AttributeKind> {
16        let Some(name_value) = args.name_value() else {
17            cx.expected_name_value(cx.attr_span, Some(sym::cfi_encoding));
18            return None;
19        };
20
21        let Some(value_str) = name_value.value_as_str() else {
22            cx.expected_string_literal(name_value.value_span, None);
23            return None;
24        };
25
26        if value_str.as_str().trim().is_empty() {
27            cx.expected_non_empty_string_literal(name_value.value_span);
28            return None;
29        }
30
31        Some(AttributeKind::CfiEncoding { encoding: value_str })
32    }
33}
rustc_attr_parsing/attributes/cfi_encoding.rs

rustc_attr_parsing/attributes/
cfi_encoding.rs
