check f16 and f128 in float_equality_without_abs #15054
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Jun 14, 2025
| && let ExprKind::Path(ref epsilon_path) = rhs.kind | ||
| && let Res::Def(DefKind::AssocConst, def_id) = cx.qpath_res(epsilon_path, rhs.hir_id) | ||
| && ([sym::f32_epsilon, sym::f64_epsilon].into_iter().any(|sym| cx.tcx.is_diagnostic_item(sym, def_id))) | ||
| && (sym_epsilon.into_iter().any(|sym| cx.tcx.is_diagnostic_item(sym, def_id))) |
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Suggestion: you can use get_diagnostic_item to avoid a bunch of query overhead, something like
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| && (sym_epsilon.into_iter().any(|sym| cx.tcx.is_diagnostic_item(sym, def_id))) | |
| && matches!(cx.tcx.get_diagnostic_name(def_id), Some(sym::f16_epsilon | sym::f32_epsilon | sym::f64_epsilon | sym::f128_epsilon)) |
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It's too long so rustfmt complains error[internal]: line formatted, but exceeded maximum width.
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You can split the line by hand and make rustfmt happy.
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Can you also add tests for this? It seems like there's also a f16_f128 FIXME in the code that could easily be resolved in the same PR here: |
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followup of rust-lang/rust#141874
changelog: check f16 and f128 in float_equality_without_abs