6072207a11
lint on duplicates during attribute parsing To do this we stuff them in the diagnostic context to be emitted after hir is constructed
35 lines
1.4 KiB
Rust
35 lines
1.4 KiB
Rust
use rustc_attr_data_structures::AttributeKind;
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use rustc_span::hygiene::Transparency;
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use rustc_span::{Symbol, sym};
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use super::{AcceptContext, AttributeOrder, OnDuplicate, SingleAttributeParser};
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use crate::context::Stage;
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use crate::parser::ArgParser;
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pub(crate) struct TransparencyParser;
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// FIXME(jdonszelmann): make these proper diagnostics
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#[allow(rustc::untranslatable_diagnostic)]
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#[allow(rustc::diagnostic_outside_of_impl)]
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impl<S: Stage> SingleAttributeParser<S> for TransparencyParser {
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const PATH: &[Symbol] = &[sym::rustc_macro_transparency];
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const ATTRIBUTE_ORDER: AttributeOrder = AttributeOrder::KeepFirst;
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const ON_DUPLICATE: OnDuplicate<S> = OnDuplicate::Custom(|cx, used, unused| {
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cx.dcx().span_err(vec![used, unused], "multiple macro transparency attributes");
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});
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fn convert(cx: &mut AcceptContext<'_, '_, S>, args: &ArgParser<'_>) -> Option<AttributeKind> {
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match args.name_value().and_then(|nv| nv.value_as_str()) {
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Some(sym::transparent) => Some(Transparency::Transparent),
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Some(sym::semiopaque | sym::semitransparent) => Some(Transparency::SemiOpaque),
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Some(sym::opaque) => Some(Transparency::Opaque),
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Some(other) => {
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cx.dcx().span_err(cx.attr_span, format!("unknown macro transparency: `{other}`"));
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None
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}
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None => None,
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}
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.map(AttributeKind::MacroTransparency)
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}
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}
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