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use crate::lints::{Expectation, ExpectationNote};
use rustc_middle::query::Providers;
use rustc_middle::ty::TyCtxt;
use rustc_session::lint::builtin::UNFULFILLED_LINT_EXPECTATIONS;
use rustc_session::lint::LintExpectationId;
use rustc_span::symbol::sym;
use rustc_span::Symbol;
pub(crate) fn provide(providers: &mut Providers) {
*providers = Providers { check_expectations, ..*providers };
}
fn check_expectations(tcx: TyCtxt<'_>, tool_filter: Option<Symbol>) {
if !tcx.features().enabled(sym::lint_reasons) {
return;
}
let lint_expectations = tcx.lint_expectations(());
let fulfilled_expectations = tcx.sess.diagnostic().steal_fulfilled_expectation_ids();
tracing::debug!(?lint_expectations, ?fulfilled_expectations);
for (id, expectation) in lint_expectations {
// This check will always be true, since `lint_expectations` only
// holds stable ids
if let LintExpectationId::Stable { hir_id, .. } = id {
if !fulfilled_expectations.contains(&id)
&& tool_filter.map_or(true, |filter| expectation.lint_tool == Some(filter))
{
let rationale = expectation.reason.map(|rationale| ExpectationNote { rationale });
let note = expectation.is_unfulfilled_lint_expectations.then_some(());
tcx.emit_spanned_lint(
UNFULFILLED_LINT_EXPECTATIONS,
*hir_id,
expectation.emission_span,
Expectation { rationale, note },
);
}
} else {
unreachable!("at this stage all `LintExpectationId`s are stable");
}
}
}
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