blob: ad83a1f7af80c9e055a378836ea409c7eddcd947 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
use rustc_attr_data_structures::AttributeKind;
use rustc_span::hygiene::Transparency;
use rustc_span::sym;
use super::{AcceptContext, SingleAttributeParser};
use crate::parser::ArgParser;
pub(crate) struct TransparencyParser;
// FIXME(jdonszelmann): make these proper diagnostics
#[allow(rustc::untranslatable_diagnostic)]
#[allow(rustc::diagnostic_outside_of_impl)]
impl SingleAttributeParser for TransparencyParser {
const PATH: &'static [rustc_span::Symbol] = &[sym::rustc_macro_transparency];
fn on_duplicate(cx: &crate::context::AcceptContext<'_>, first_span: rustc_span::Span) {
cx.dcx().span_err(vec![first_span, cx.attr_span], "multiple macro transparency attributes");
}
fn convert(cx: &AcceptContext<'_>, args: &ArgParser<'_>) -> Option<AttributeKind> {
match args.name_value().and_then(|nv| nv.value_as_str()) {
Some(sym::transparent) => Some(Transparency::Transparent),
Some(sym::semitransparent) => Some(Transparency::SemiTransparent),
Some(sym::opaque) => Some(Transparency::Opaque),
Some(other) => {
cx.dcx().span_err(cx.attr_span, format!("unknown macro transparency: `{other}`"));
None
}
None => None,
}
.map(AttributeKind::MacroTransparency)
}
}
|
