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use clippy_utils::diagnostics::span_lint_and_then;
use clippy_utils::is_slice_of_primitives;
use clippy_utils::source::snippet_with_context;
use rustc_errors::Applicability;
use rustc_hir::Expr;
use rustc_lint::LateContext;
use super::STABLE_SORT_PRIMITIVE;
pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'_>, recv: &'tcx Expr<'_>) {
if let Some(method_id) = cx.typeck_results().type_dependent_def_id(e.hir_id)
&& let Some(impl_id) = cx.tcx.impl_of_method(method_id)
&& cx.tcx.type_of(impl_id).is_slice()
&& let Some(slice_type) = is_slice_of_primitives(cx, recv)
{
span_lint_and_then(
cx,
STABLE_SORT_PRIMITIVE,
e.span,
&format!("used `sort` on primitive type `{}`", slice_type),
|diag| {
let mut app = Applicability::MachineApplicable;
let recv_snip = snippet_with_context(cx, recv.span, e.span.ctxt(), "..", &mut app).0;
diag.span_suggestion(e.span, "try", format!("{}.sort_unstable()", recv_snip), app);
diag.note(
"an unstable sort typically performs faster without any observable difference for this data type",
);
},
);
}
}
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