rustc_attr_parsing/attributes/
cfi_encoding.rs

1use rustc_feature::AttributeStability;
2
3use super::prelude::*;
4pub(crate) struct CfiEncodingParser;
5impl SingleAttributeParser for CfiEncodingParser {
6    const PATH: &[Symbol] = &[sym::cfi_encoding];
7    const ALLOWED_TARGETS: AllowedTargets = AllowedTargets::AllowListWarnRest(&[
8        Allow(Target::Struct),
9        Allow(Target::ForeignTy),
10        Allow(Target::Enum),
11        Allow(Target::Union),
12    ]);
13    const TEMPLATE: AttributeTemplate = ::rustc_feature::AttributeTemplate {
    word: false,
    list: None,
    one_of: &[],
    name_value_str: Some(&["encoding"]),
    docs: None,
}template!(NameValueStr: "encoding");
14    const STABILITY: AttributeStability = AttributeStability::Unstable {
    gate_name: rustc_span::sym::cfi_encoding,
    gate_check: rustc_feature::Features::cfi_encoding,
    notes: &[],
}unstable!(cfi_encoding);
15
16    fn convert(cx: &mut AcceptContext<'_, '_>, args: &ArgParser) -> Option<AttributeKind> {
17        let name_value = cx.expect_name_value(args, cx.attr_span, Some(sym::cfi_encoding))?;
18
19        let value_str = cx.expect_string_literal(name_value)?;
20
21        if value_str.as_str().trim().is_empty() {
22            cx.adcx().expected_non_empty_string_literal(name_value.value_span);
23            return None;
24        }
25
26        Some(AttributeKind::CfiEncoding { encoding: value_str })
27    }
28}
rustc_attr_parsing/attributes/cfi_encoding.rs

rustc_attr_parsing/attributes/
cfi_encoding.rs
