check f16 and f128 in float_equality_without_abs

Author: usamoi

clippy_lints/src/operators/float_equality_without_abs.rs

@@ -24,6 +24,8 @@ pub(crate) fn check<'tcx>(
         _ => return,
     };
 
+    let sym_epsilon = [sym::f16_epsilon, sym::f32_epsilon, sym::f64_epsilon, sym::f128_epsilon];
+
     if let ExprKind::Binary(
         // left hand side is a subtraction
             Spanned {
@@ -34,10 +36,10 @@ pub(crate) fn check<'tcx>(
             val_r,
         ) = lhs.kind
 
-        // right hand side matches either f32::EPSILON or f64::EPSILON
+        // right hand side matches _::EPSILON
         && 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)))
 
         // values of the subtractions on the left hand side are of the type float
         && let t_val_l = cx.typeck_results().expr_ty(val_l)