Skip to main content

rustc_attr_parsing/attributes/
cfi_encoding.rs

1use super::prelude::*;
2pub(crate) struct CfiEncodingParser;
3impl SingleAttributeParser 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 TEMPLATE: AttributeTemplate = ::rustc_feature::AttributeTemplate {
    word: false,
    list: None,
    one_of: &[],
    name_value_str: Some(&["encoding"]),
    docs: None,
}template!(NameValueStr: "encoding");
12
13    fn convert(cx: &mut AcceptContext<'_, '_>, args: &ArgParser) -> Option<AttributeKind> {
14        let name_value = cx.expect_name_value(args, cx.attr_span, Some(sym::cfi_encoding))?;
15
16        let value_str = cx.expect_string_literal(name_value)?;
17
18        if value_str.as_str().trim().is_empty() {
19            cx.adcx().expected_non_empty_string_literal(name_value.value_span);
20            return None;
21        }
22
23        Some(AttributeKind::CfiEncoding { encoding: value_str })
24    }
25}