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use rustc_errors::{DiagArgValue, LintEmitter};
use rustc_hir::lints::{AttributeLint, AttributeLintKind};
use rustc_hir::{HirId, Target};
use rustc_span::sym;
use crate::session_diagnostics;
pub fn emit_attribute_lint<L: LintEmitter>(lint: &AttributeLint<HirId>, lint_emitter: L) {
let AttributeLint { id, span, kind } = lint;
match kind {
&AttributeLintKind::UnusedDuplicate { this, other, warning } => lint_emitter
.emit_node_span_lint(
rustc_session::lint::builtin::UNUSED_ATTRIBUTES,
*id,
*span,
session_diagnostics::UnusedDuplicate { this, other, warning },
),
AttributeLintKind::IllFormedAttributeInput { suggestions } => {
lint_emitter.emit_node_span_lint(
rustc_session::lint::builtin::ILL_FORMED_ATTRIBUTE_INPUT,
*id,
*span,
session_diagnostics::IllFormedAttributeInput {
num_suggestions: suggestions.len(),
suggestions: DiagArgValue::StrListSepByAnd(
suggestions.into_iter().map(|s| format!("`{s}`").into()).collect(),
),
},
);
}
AttributeLintKind::EmptyAttribute { first_span } => lint_emitter.emit_node_span_lint(
rustc_session::lint::builtin::UNUSED_ATTRIBUTES,
*id,
*first_span,
session_diagnostics::EmptyAttributeList { attr_span: *first_span },
),
&AttributeLintKind::InvalidTarget { name, target, ref applied, only } => lint_emitter
.emit_node_span_lint(
// This check is here because `deprecated` had its own lint group and removing this would be a breaking change
if name == sym::deprecated
&& ![Target::Closure, Target::Expression, Target::Statement, Target::Arm]
.contains(&target)
{
rustc_session::lint::builtin::USELESS_DEPRECATED
} else {
rustc_session::lint::builtin::UNUSED_ATTRIBUTES
},
*id,
*span,
session_diagnostics::InvalidTargetLint {
name,
target: target.plural_name(),
applied: applied.clone(),
only,
attr_span: *span,
},
),
}
}
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