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 ON_DUPLICATE: OnDuplicate<S> = OnDuplicate::Error;
12    const TEMPLATE: AttributeTemplate = ::rustc_feature::AttributeTemplate {
    word: false,
    list: None,
    one_of: &[],
    name_value_str: Some(&["encoding"]),
    docs: None,
}template!(NameValueStr: "encoding");
13
14    fn convert(cx: &mut AcceptContext<'_, '_, S>, args: &ArgParser) -> Option<AttributeKind> {
15        let Some(name_value) = args.name_value() else {
16            cx.expected_name_value(cx.attr_span, Some(sym::cfi_encoding));
17            return None;
18        };
19
20        let Some(value_str) = name_value.value_as_str() else {
21            cx.expected_string_literal(name_value.value_span, None);
22            return None;
23        };
24
25        if value_str.as_str().trim().is_empty() {
26            cx.expected_non_empty_string_literal(name_value.value_span);
27            return None;
28        }
29
30        Some(AttributeKind::CfiEncoding { encoding: value_str })
31    }
32}
rustc_attr_parsing/attributes/cfi_encoding.rs

rustc_attr_parsing/attributes/
cfi_encoding.rs
