From 74f01d2538123616b05e9eb58934c35cdd50b4dc Mon Sep 17 00:00:00 2001
From: Philippe Renon <philippe_renon@yahoo.fr>
Date: Sun, 25 Oct 2020 18:23:24 +0100
Subject: [PATCH 1/2] clippy: fix suspicious_arithmetic_impl errors (false
 positives)

---
 src/geometry/isometry_ops.rs     |  26 ++++---
 src/geometry/quaternion_ops.rs   | 124 ++++++++++++++-----------------
 src/geometry/rotation_ops.rs     |  16 ++--
 src/geometry/similarity_ops.rs   |  43 +++++------
 src/geometry/transform_ops.rs    |  57 +++++++-------
 src/geometry/translation_ops.rs  | 110 +++++++--------------------
 src/geometry/unit_complex_ops.rs |   8 +-
 7 files changed, 162 insertions(+), 222 deletions(-)

diff --git a/src/geometry/isometry_ops.rs b/src/geometry/isometry_ops.rs
index 8b00fcda7..e676d4920 100644
--- a/src/geometry/isometry_ops.rs
+++ b/src/geometry/isometry_ops.rs
@@ -149,6 +149,7 @@ isometry_binop_impl_all!(
     [ref ref] => {
         let shift = self.rotation.transform_vector(&rhs.translation.vector);
 
+        #[allow(clippy::suspicious_arithmetic_impl)]
         Isometry::from_parts(Translation::from(&self.translation.vector + shift),
                              self.rotation.clone() * rhs.rotation.clone()) // FIXME: too bad we have to clone.
     };
@@ -157,10 +158,10 @@ isometry_binop_impl_all!(
 isometry_binop_impl_all!(
     Div, div;
     self: Isometry<N, D, R>, rhs: Isometry<N, D, R>, Output = Isometry<N, D, R>;
-    [val val] => self * rhs.inverse();
-    [ref val] => self * rhs.inverse();
-    [val ref] => self * rhs.inverse();
-    [ref ref] => self * rhs.inverse();
+    [val val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
+    [ref val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
+    [val ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
+    [ref ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
 );
 
 // Isometry ×= Translation
@@ -289,6 +290,7 @@ isometry_binop_impl_all!(
     [ref val] => self * &right;
     [val ref] => &self * right;
     [ref ref] => {
+        #[allow(clippy::suspicious_arithmetic_impl)]
         let new_tr = &self.translation.vector + self.rotation.transform_vector(&right.vector);
         Isometry::from_parts(Translation::from(new_tr), self.rotation.clone())
     };
@@ -427,10 +429,10 @@ isometry_from_composition_impl_all!(
     self: Rotation<N, D>, right: Isometry<N, D, Rotation<N, D>>,
     Output = Isometry<N, D, Rotation<N, D>>;
     // FIXME: don't call inverse explicitly?
-    [val val] => self * right.inverse();
-    [ref val] => self * right.inverse();
-    [val ref] => self * right.inverse();
-    [ref ref] => self * right.inverse();
+    [val val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * right.inverse() };
+    [ref val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * right.inverse() };
+    [val ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * right.inverse() };
+    [ref ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * right.inverse() };
 );
 
 // Isometry × UnitQuaternion
@@ -479,10 +481,10 @@ isometry_from_composition_impl_all!(
     self: UnitQuaternion<N>, right: Isometry<N, U3, UnitQuaternion<N>>,
     Output = Isometry<N, U3, UnitQuaternion<N>>;
     // FIXME: don't call inverse explicitly?
-    [val val] => self * right.inverse();
-    [ref val] => self * right.inverse();
-    [val ref] => self * right.inverse();
-    [ref ref] => self * right.inverse();
+    [val val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * right.inverse() };
+    [ref val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * right.inverse() };
+    [val ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * right.inverse() };
+    [ref ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * right.inverse() };
 );
 
 // Translation × Rotation
diff --git a/src/geometry/quaternion_ops.rs b/src/geometry/quaternion_ops.rs
index e18c1b16a..d91d7fd87 100644
--- a/src/geometry/quaternion_ops.rs
+++ b/src/geometry/quaternion_ops.rs
@@ -121,11 +121,10 @@ quaternion_op_impl!(
     'b);
 
 quaternion_op_impl!(
-Add, add;
-(U4, U1), (U4, U1);
-self: Quaternion<N>, rhs: Quaternion<N>, Output = Quaternion<N>;
-Quaternion::from(self.coords + rhs.coords);
-);
+    Add, add;
+    (U4, U1), (U4, U1);
+    self: Quaternion<N>, rhs: Quaternion<N>, Output = Quaternion<N>;
+    Quaternion::from(self.coords + rhs.coords); );
 
 // Quaternion - Quaternion
 quaternion_op_impl!(
@@ -150,11 +149,10 @@ quaternion_op_impl!(
     'b);
 
 quaternion_op_impl!(
-Sub, sub;
-(U4, U1), (U4, U1);
-self: Quaternion<N>, rhs: Quaternion<N>, Output = Quaternion<N>;
-Quaternion::from(self.coords - rhs.coords);
-);
+    Sub, sub;
+    (U4, U1), (U4, U1);
+    self: Quaternion<N>, rhs: Quaternion<N>, Output = Quaternion<N>;
+    Quaternion::from(self.coords - rhs.coords); );
 
 // Quaternion × Quaternion
 quaternion_op_impl!(
@@ -183,11 +181,10 @@ quaternion_op_impl!(
     'b);
 
 quaternion_op_impl!(
-Mul, mul;
-(U4, U1), (U4, U1);
-self: Quaternion<N>, rhs: Quaternion<N>, Output = Quaternion<N>;
-&self * &rhs;
-);
+    Mul, mul;
+    (U4, U1), (U4, U1);
+    self: Quaternion<N>, rhs: Quaternion<N>, Output = Quaternion<N>;
+    &self * &rhs; );
 
 // UnitQuaternion × UnitQuaternion
 quaternion_op_impl!(
@@ -212,18 +209,17 @@ quaternion_op_impl!(
     'b);
 
 quaternion_op_impl!(
-Mul, mul;
-(U4, U1), (U4, U1);
-self: UnitQuaternion<N>, rhs: UnitQuaternion<N>, Output = UnitQuaternion<N>;
-&self * &rhs;
-);
+    Mul, mul;
+    (U4, U1), (U4, U1);
+    self: UnitQuaternion<N>, rhs: UnitQuaternion<N>, Output = UnitQuaternion<N>;
+    &self * &rhs; );
 
 // UnitQuaternion ÷ UnitQuaternion
 quaternion_op_impl!(
     Div, div;
     (U4, U1), (U4, U1);
     self: &'a UnitQuaternion<N>, rhs: &'b UnitQuaternion<N>, Output = UnitQuaternion<N>;
-    self * rhs.inverse();
+    #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
     'a, 'b);
 
 quaternion_op_impl!(
@@ -241,11 +237,10 @@ quaternion_op_impl!(
     'b);
 
 quaternion_op_impl!(
-Div, div;
-(U4, U1), (U4, U1);
-self: UnitQuaternion<N>, rhs: UnitQuaternion<N>, Output = UnitQuaternion<N>;
-&self / &rhs;
-);
+    Div, div;
+    (U4, U1), (U4, U1);
+    self: UnitQuaternion<N>, rhs: UnitQuaternion<N>, Output = UnitQuaternion<N>;
+    &self / &rhs; );
 
 // UnitQuaternion × Rotation
 quaternion_op_impl!(
@@ -274,12 +269,11 @@ quaternion_op_impl!(
     'b);
 
 quaternion_op_impl!(
-Mul, mul;
-(U4, U1), (U3, U3);
-self: UnitQuaternion<N>, rhs: Rotation<N, U3>,
-Output = UnitQuaternion<N> => U3, U3;
-self * UnitQuaternion::<N>::from_rotation_matrix(&rhs);
-);
+    Mul, mul;
+    (U4, U1), (U3, U3);
+    self: UnitQuaternion<N>, rhs: Rotation<N, U3>,
+    Output = UnitQuaternion<N> => U3, U3;
+    self * UnitQuaternion::<N>::from_rotation_matrix(&rhs); );
 
 // UnitQuaternion ÷ Rotation
 quaternion_op_impl!(
@@ -308,12 +302,11 @@ quaternion_op_impl!(
     'b);
 
 quaternion_op_impl!(
-Div, div;
-(U4, U1), (U3, U3);
-self: UnitQuaternion<N>, rhs: Rotation<N, U3>,
-Output = UnitQuaternion<N> => U3, U3;
-self / UnitQuaternion::<N>::from_rotation_matrix(&rhs);
-);
+    Div, div;
+    (U4, U1), (U3, U3);
+    self: UnitQuaternion<N>, rhs: Rotation<N, U3>,
+    Output = UnitQuaternion<N> => U3, U3;
+    self / UnitQuaternion::<N>::from_rotation_matrix(&rhs); );
 
 // Rotation × UnitQuaternion
 quaternion_op_impl!(
@@ -342,12 +335,11 @@ quaternion_op_impl!(
     'b);
 
 quaternion_op_impl!(
-Mul, mul;
-(U3, U3), (U4, U1);
-self: Rotation<N, U3>, rhs: UnitQuaternion<N>,
-Output = UnitQuaternion<N> => U3, U3;
-UnitQuaternion::<N>::from_rotation_matrix(&self) * rhs;
-);
+    Mul, mul;
+    (U3, U3), (U4, U1);
+    self: Rotation<N, U3>, rhs: UnitQuaternion<N>,
+    Output = UnitQuaternion<N> => U3, U3;
+    UnitQuaternion::<N>::from_rotation_matrix(&self) * rhs; );
 
 // Rotation ÷ UnitQuaternion
 quaternion_op_impl!(
@@ -376,12 +368,11 @@ quaternion_op_impl!(
     'b);
 
 quaternion_op_impl!(
-Div, div;
-(U3, U3), (U4, U1);
-self: Rotation<N, U3>, rhs: UnitQuaternion<N>,
-Output = UnitQuaternion<N> => U3, U3;
-UnitQuaternion::<N>::from_rotation_matrix(&self) / rhs;
-);
+    Div, div;
+    (U3, U3), (U4, U1);
+    self: Rotation<N, U3>, rhs: UnitQuaternion<N>,
+    Output = UnitQuaternion<N> => U3, U3;
+    UnitQuaternion::<N>::from_rotation_matrix(&self) / rhs; );
 
 // UnitQuaternion × Vector
 quaternion_op_impl!(
@@ -415,12 +406,11 @@ quaternion_op_impl!(
     'b);
 
 quaternion_op_impl!(
-Mul, mul;
-(U4, U1), (U3, U1) for SB: Storage<N, U3> ;
-self: UnitQuaternion<N>, rhs: Vector<N, U3, SB>,
-Output = Vector3<N> => U3, U4;
-&self * &rhs;
-);
+    Mul, mul;
+    (U4, U1), (U3, U1) for SB: Storage<N, U3> ;
+    self: UnitQuaternion<N>, rhs: Vector<N, U3, SB>,
+    Output = Vector3<N> => U3, U4;
+    &self * &rhs; );
 
 // UnitQuaternion × Point
 quaternion_op_impl!(
@@ -448,12 +438,11 @@ quaternion_op_impl!(
     'b);
 
 quaternion_op_impl!(
-Mul, mul;
-(U4, U1), (U3, U1);
-self: UnitQuaternion<N>, rhs: Point3<N>,
-Output = Point3<N> => U3, U4;
-Point3::from(self * rhs.coords);
-);
+    Mul, mul;
+    (U4, U1), (U3, U1);
+    self: UnitQuaternion<N>, rhs: Point3<N>,
+    Output = Point3<N> => U3, U4;
+    Point3::from(self * rhs.coords); );
 
 // UnitQuaternion × Unit<Vector>
 quaternion_op_impl!(
@@ -481,12 +470,11 @@ quaternion_op_impl!(
     'b);
 
 quaternion_op_impl!(
-Mul, mul;
-(U4, U1), (U3, U1) for SB: Storage<N, U3> ;
-self: UnitQuaternion<N>, rhs: Unit<Vector<N, U3, SB>>,
-Output = Unit<Vector3<N>> => U3, U4;
-Unit::new_unchecked(self * rhs.into_inner());
-);
+    Mul, mul;
+    (U4, U1), (U3, U1) for SB: Storage<N, U3> ;
+    self: UnitQuaternion<N>, rhs: Unit<Vector<N, U3, SB>>,
+    Output = Unit<Vector3<N>> => U3, U4;
+    Unit::new_unchecked(self * rhs.into_inner()); );
 
 macro_rules! scalar_op_impl(
     ($($Op: ident, $op: ident, $OpAssign: ident, $op_assign: ident);* $(;)*) => {$(
diff --git a/src/geometry/rotation_ops.rs b/src/geometry/rotation_ops.rs
index b3330877a..9b90c856d 100644
--- a/src/geometry/rotation_ops.rs
+++ b/src/geometry/rotation_ops.rs
@@ -59,10 +59,10 @@ md_impl_all!(
     Div, div;
     (D, D), (D, D) for D: DimName;
     self: Rotation<N, D>, right: Rotation<N, D>, Output = Rotation<N, D>;
-    [val val] => self * right.inverse();
-    [ref val] => self * right.inverse();
-    [val ref] => self * right.inverse();
-    [ref ref] => self * right.inverse();
+    [val val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * right.inverse() };
+    [ref val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * right.inverse() };
+    [val ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * right.inverse() };
+    [ref ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * right.inverse() };
 );
 
 // Rotation × Matrix
@@ -98,10 +98,10 @@ md_impl_all!(
     where DefaultAllocator: Allocator<N, R1, D2>
     where ShapeConstraint: AreMultipliable<R1, C1, D2, D2>;
     self: Matrix<N, R1, C1, SA>, right: Rotation<N, D2>, Output = MatrixMN<N, R1, D2>;
-    [val val] => self * right.inverse();
-    [ref val] => self * right.inverse();
-    [val ref] => self * right.inverse();
-    [ref ref] => self * right.inverse();
+    [val val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * right.inverse() };
+    [ref val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * right.inverse() };
+    [val ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * right.inverse() };
+    [ref ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * right.inverse() };
 );
 
 // Rotation × Point
diff --git a/src/geometry/similarity_ops.rs b/src/geometry/similarity_ops.rs
index 9043a6672..d011871d7 100644
--- a/src/geometry/similarity_ops.rs
+++ b/src/geometry/similarity_ops.rs
@@ -158,15 +158,14 @@ similarity_binop_impl_all!(
 similarity_binop_impl_all!(
     Div, div;
     self: Similarity<N, D, R>, rhs: Similarity<N, D, R>, Output = Similarity<N, D, R>;
-    [val val] => self * rhs.inverse();
-    [ref val] => self * rhs.inverse();
-    [val ref] => self * rhs.inverse();
-    [ref ref] => self * rhs.inverse();
+    [val val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
+    [ref val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
+    [val ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
+    [ref ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
 );
 
 // Similarity ×= Translation
 similarity_binop_assign_impl_all!(
-
     MulAssign, mul_assign;
     self: Similarity<N, D, R>, rhs: Translation<N, D>;
     [val] => *self *= &rhs;
@@ -281,6 +280,7 @@ similarity_binop_impl_all!(
     [ref ref] => {
         let shift = self.isometry.rotation.transform_vector(&rhs.translation.vector) * self.scaling();
         Similarity::from_parts(
+            #[allow(clippy::suspicious_arithmetic_impl)]
             Translation::from(&self.isometry.translation.vector + shift),
             self.isometry.rotation.clone() * rhs.rotation.clone(),
             self.scaling())
@@ -290,10 +290,10 @@ similarity_binop_impl_all!(
 similarity_binop_impl_all!(
     Div, div;
     self: Similarity<N, D, R>, rhs: Isometry<N, D, R>, Output = Similarity<N, D, R>;
-    [val val] => self * rhs.inverse();
-    [ref val] => self * rhs.inverse();
-    [val ref] => self * rhs.inverse();
-    [ref ref] => self * rhs.inverse();
+    [val val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
+    [ref val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
+    [val ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
+    [ref ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
 );
 
 // Isometry × Similarity
@@ -322,10 +322,10 @@ similarity_binop_impl_all!(
 similarity_binop_impl_all!(
     Div, div;
     self: Isometry<N, D, R>, rhs: Similarity<N, D, R>, Output = Similarity<N, D, R>;
-    [val val] => self * rhs.inverse();
-    [ref val] => self * rhs.inverse();
-    [val ref] => self * rhs.inverse();
-    [ref ref] => self * rhs.inverse();
+    [val val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
+    [ref val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
+    [val ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
+    [ref ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
 );
 
 // Similarity × Point
@@ -364,6 +364,7 @@ similarity_binop_impl_all!(
     [ref ref] => {
         let shift = self.isometry.rotation.transform_vector(&right.vector) * self.scaling();
         Similarity::from_parts(
+            #[allow(clippy::suspicious_arithmetic_impl)]
             Translation::from(&self.isometry.translation.vector + shift),
             self.isometry.rotation.clone(),
             self.scaling())
@@ -495,10 +496,10 @@ similarity_from_composition_impl_all!(
     self: Rotation<N, D>, right: Similarity<N, D, Rotation<N, D>>,
     Output = Similarity<N, D, Rotation<N, D>>;
     // FIXME: don't call inverse explicitly?
-    [val val] => self * right.inverse();
-    [ref val] => self * right.inverse();
-    [val ref] => self * right.inverse();
-    [ref ref] => self * right.inverse();
+    [val val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * right.inverse() };
+    [ref val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * right.inverse() };
+    [val ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * right.inverse() };
+    [ref ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * right.inverse() };
 );
 
 // Similarity × UnitQuaternion
@@ -556,10 +557,10 @@ similarity_from_composition_impl_all!(
     self: UnitQuaternion<N>, right: Similarity<N, U3, UnitQuaternion<N>>,
     Output = Similarity<N, U3, UnitQuaternion<N>>;
     // FIXME: don't call inverse explicitly?
-    [val val] => self * right.inverse();
-    [ref val] => self * right.inverse();
-    [val ref] => self * right.inverse();
-    [ref ref] => self * right.inverse();
+    [val val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * right.inverse() };
+    [ref val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * right.inverse() };
+    [val ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * right.inverse() };
+    [ref ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * right.inverse() };
 );
 
 // Similarity × UnitComplex
diff --git a/src/geometry/transform_ops.rs b/src/geometry/transform_ops.rs
index 5773782c8..6986a90ae 100644
--- a/src/geometry/transform_ops.rs
+++ b/src/geometry/transform_ops.rs
@@ -143,6 +143,7 @@ md_impl_all!(
 
         if C::has_normalizer() {
             let normalizer = self.matrix().fixed_slice::<U1, D>(D::dim(), 0);
+            #[allow(clippy::suspicious_arithmetic_impl)]
             let n = normalizer.tr_dot(&rhs.coords) + unsafe { *self.matrix().get_unchecked((D::dim(), D::dim())) };
 
             if !n.is_zero() {
@@ -293,10 +294,10 @@ md_impl_all!(
     Div, div where N: RealField;
     (DimNameSum<D, U1>, DimNameSum<D, U1>), (DimNameSum<D, U1>, DimNameSum<D, U1>) for D: DimNameAdd<U1>, CA: TCategoryMul<CB>, CB: SubTCategoryOf<TProjective>;
     self: Transform<N, D, CA>, rhs: Transform<N, D, CB>, Output = Transform<N, D, CA::Representative>;
-    [val val] => self * rhs.inverse();
-    [ref val] => self * rhs.inverse();
-    [val ref] => self * rhs.clone().inverse();
-    [ref ref] => self * rhs.clone().inverse();
+    [val val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
+    [ref val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
+    [val ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.clone().inverse() };
+    [ref ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.clone().inverse() };
 );
 
 // Transform ÷ Rotation
@@ -304,10 +305,10 @@ md_impl_all!(
     Div, div where N: RealField;
     (DimNameSum<D, U1>, DimNameSum<D, U1>), (D, D) for D: DimNameAdd<U1>, C: TCategoryMul<TAffine>;
     self: Transform<N, D, C>, rhs: Rotation<N, D>, Output = Transform<N, D, C::Representative>;
-    [val val] => self * rhs.inverse();
-    [ref val] => self * rhs.inverse();
-    [val ref] => self * rhs.inverse();
-    [ref ref] => self * rhs.inverse();
+    [val val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
+    [ref val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
+    [val ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
+    [ref ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
 );
 
 // Rotation ÷ Transform
@@ -315,10 +316,10 @@ md_impl_all!(
     Div, div where N: RealField;
     (D, D), (DimNameSum<D, U1>, DimNameSum<D, U1>) for D: DimNameAdd<U1>, C: TCategoryMul<TAffine>;
     self: Rotation<N, D>, rhs: Transform<N, D, C>, Output = Transform<N, D, C::Representative>;
-    [val val] => self.inverse() * rhs;
-    [ref val] => self.inverse() * rhs;
-    [val ref] => self.inverse() * rhs;
-    [ref ref] => self.inverse() * rhs;
+    [val val] => #[allow(clippy::suspicious_arithmetic_impl)] { self.inverse() * rhs };
+    [ref val] => #[allow(clippy::suspicious_arithmetic_impl)] { self.inverse() * rhs };
+    [val ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self.inverse() * rhs };
+    [ref ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self.inverse() * rhs };
 );
 
 // Transform ÷ UnitQuaternion
@@ -326,10 +327,10 @@ md_impl_all!(
     Div, div where N: RealField;
     (U4, U4), (U4, U1) for C: TCategoryMul<TAffine>;
     self: Transform<N, U3, C>, rhs: UnitQuaternion<N>, Output = Transform<N, U3, C::Representative>;
-    [val val] => self * rhs.inverse();
-    [ref val] => self * rhs.inverse();
-    [val ref] => self * rhs.inverse();
-    [ref ref] => self * rhs.inverse();
+    [val val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
+    [ref val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
+    [val ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
+    [ref ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
 );
 
 // UnitQuaternion ÷ Transform
@@ -337,10 +338,10 @@ md_impl_all!(
     Div, div where N: RealField;
     (U4, U1), (U4, U4) for C: TCategoryMul<TAffine>;
     self: UnitQuaternion<N>, rhs: Transform<N, U3, C>, Output = Transform<N, U3, C::Representative>;
-    [val val] => self.inverse() * rhs;
-    [ref val] => self.inverse() * rhs;
-    [val ref] => self.inverse() * rhs;
-    [ref ref] => self.inverse() * rhs;
+    [val val] => #[allow(clippy::suspicious_arithmetic_impl)] { self.inverse() * rhs };
+    [ref val] => #[allow(clippy::suspicious_arithmetic_impl)] { self.inverse() * rhs };
+    [val ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self.inverse() * rhs };
+    [ref ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self.inverse() * rhs };
 );
 
 //      // Transform ÷ Isometry
@@ -402,10 +403,10 @@ md_impl_all!(
     Div, div where N: RealField;
     (DimNameSum<D, U1>, DimNameSum<D, U1>), (D, U1) for D: DimNameAdd<U1>, C: TCategoryMul<TAffine>;
     self: Transform<N, D, C>, rhs: Translation<N, D>, Output = Transform<N, D, C::Representative>;
-    [val val] => self * rhs.inverse();
-    [ref val] => self * rhs.inverse();
-    [val ref] => self * rhs.inverse();
-    [ref ref] => self * rhs.inverse();
+    [val val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
+    [ref val] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
+    [val ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
+    [ref ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * rhs.inverse() };
 );
 
 // Translation ÷ Transform
@@ -414,10 +415,10 @@ md_impl_all!(
     (D, U1), (DimNameSum<D, U1>, DimNameSum<D, U1>)
     for D: DimNameAdd<U1>, C: TCategoryMul<TAffine>;
     self: Translation<N, D>, rhs: Transform<N, D, C>, Output = Transform<N, D, C::Representative>;
-    [val val] => self.inverse() * rhs;
-    [ref val] => self.inverse() * rhs;
-    [val ref] => self.inverse() * rhs;
-    [ref ref] => self.inverse() * rhs;
+    [val val] => #[allow(clippy::suspicious_arithmetic_impl)] { self.inverse() * rhs };
+    [ref val] => #[allow(clippy::suspicious_arithmetic_impl)] { self.inverse() * rhs };
+    [val ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self.inverse() * rhs };
+    [ref ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self.inverse() * rhs };
 );
 
 // Transform ×= Transform
diff --git a/src/geometry/translation_ops.rs b/src/geometry/translation_ops.rs
index c00b25bc1..8d543c209 100644
--- a/src/geometry/translation_ops.rs
+++ b/src/geometry/translation_ops.rs
@@ -13,44 +13,50 @@ use crate::geometry::{Point, Translation};
 add_sub_impl!(Mul, mul, ClosedAdd;
     (D, U1), (D, U1) -> (D) for D: DimName;
     self: &'a Translation<N, D>, right: &'b Translation<N, D>, Output = Translation<N, D>;
-    Translation::from(&self.vector + &right.vector); 'a, 'b);
+    #[allow(clippy::suspicious_arithmetic_impl)] { Translation::from(&self.vector + &right.vector) };
+    'a, 'b);
 
 add_sub_impl!(Mul, mul, ClosedAdd;
     (D, U1), (D, U1) -> (D) for D: DimName;
     self: &'a Translation<N, D>, right: Translation<N, D>, Output = Translation<N, D>;
-    Translation::from(&self.vector + right.vector); 'a);
+    #[allow(clippy::suspicious_arithmetic_impl)] { Translation::from(&self.vector + right.vector) };
+    'a);
 
 add_sub_impl!(Mul, mul, ClosedAdd;
     (D, U1), (D, U1) -> (D) for D: DimName;
     self: Translation<N, D>, right: &'b Translation<N, D>, Output = Translation<N, D>;
-    Translation::from(self.vector + &right.vector); 'b);
+    #[allow(clippy::suspicious_arithmetic_impl)] { Translation::from(self.vector + &right.vector) };
+    'b);
 
 add_sub_impl!(Mul, mul, ClosedAdd;
     (D, U1), (D, U1) -> (D) for D: DimName;
     self: Translation<N, D>, right: Translation<N, D>, Output = Translation<N, D>;
-    Translation::from(self.vector + right.vector); );
+    #[allow(clippy::suspicious_arithmetic_impl)] { Translation::from(self.vector + right.vector) }; );
 
 // Translation ÷ Translation
 // FIXME: instead of calling inverse explicitly, could we just add a `mul_tr` or `mul_inv` method?
 add_sub_impl!(Div, div, ClosedSub;
     (D, U1), (D, U1) -> (D) for D: DimName;
     self: &'a Translation<N, D>, right: &'b Translation<N, D>, Output = Translation<N, D>;
-    Translation::from(&self.vector - &right.vector); 'a, 'b);
+    #[allow(clippy::suspicious_arithmetic_impl)] { Translation::from(&self.vector - &right.vector) };
+    'a, 'b);
 
 add_sub_impl!(Div, div, ClosedSub;
     (D, U1), (D, U1) -> (D) for D: DimName;
     self: &'a Translation<N, D>, right: Translation<N, D>, Output = Translation<N, D>;
-    Translation::from(&self.vector - right.vector); 'a);
+    #[allow(clippy::suspicious_arithmetic_impl)] { Translation::from(&self.vector - right.vector) };
+    'a);
 
 add_sub_impl!(Div, div, ClosedSub;
     (D, U1), (D, U1) -> (D) for D: DimName;
     self: Translation<N, D>, right: &'b Translation<N, D>, Output = Translation<N, D>;
-    Translation::from(self.vector - &right.vector); 'b);
+    #[allow(clippy::suspicious_arithmetic_impl)] { Translation::from(self.vector - &right.vector) };
+    'b);
 
 add_sub_impl!(Div, div, ClosedSub;
     (D, U1), (D, U1) -> (D) for D: DimName;
     self: Translation<N, D>, right: Translation<N, D>, Output = Translation<N, D>;
-    Translation::from(self.vector - right.vector); );
+    #[allow(clippy::suspicious_arithmetic_impl)] { Translation::from(self.vector - right.vector) }; );
 
 // Translation × Point
 // FIXME: we don't handle properly non-zero origins here. Do we want this to be the intended
@@ -58,107 +64,45 @@ add_sub_impl!(Div, div, ClosedSub;
 add_sub_impl!(Mul, mul, ClosedAdd;
     (D, U1), (D, U1) -> (D) for D: DimName;
     self: &'a Translation<N, D>, right: &'b Point<N, D>, Output = Point<N, D>;
-    right + &self.vector; 'a, 'b);
+    #[allow(clippy::suspicious_arithmetic_impl)] { right + &self.vector };
+    'a, 'b);
 
 add_sub_impl!(Mul, mul, ClosedAdd;
     (D, U1), (D, U1) -> (D) for D: DimName;
     self: &'a Translation<N, D>, right: Point<N, D>, Output = Point<N, D>;
-    right + &self.vector; 'a);
+    #[allow(clippy::suspicious_arithmetic_impl)] { right + &self.vector };
+    'a);
 
 add_sub_impl!(Mul, mul, ClosedAdd;
     (D, U1), (D, U1) -> (D) for D: DimName;
     self: Translation<N, D>, right: &'b Point<N, D>, Output = Point<N, D>;
-    right + self.vector; 'b);
+    #[allow(clippy::suspicious_arithmetic_impl)] { right + self.vector };
+    'b);
 
 add_sub_impl!(Mul, mul, ClosedAdd;
     (D, U1), (D, U1) -> (D) for D: DimName;
     self: Translation<N, D>, right: Point<N, D>, Output = Point<N, D>;
-    right + self.vector; );
+    #[allow(clippy::suspicious_arithmetic_impl)] { right + self.vector }; );
 
 // Translation *= Translation
 add_sub_assign_impl!(MulAssign, mul_assign, ClosedAdd;
     (D, U1), (D, U1) for D: DimName;
     self: Translation<N, D>, right: &'b Translation<N, D>;
-    self.vector += &right.vector; 'b);
+    #[allow(clippy::suspicious_arithmetic_impl)] { self.vector += &right.vector };
+    'b);
 
 add_sub_assign_impl!(MulAssign, mul_assign, ClosedAdd;
     (D, U1), (D, U1) for D: DimName;
     self: Translation<N, D>, right: Translation<N, D>;
-    self.vector += right.vector; );
+    #[allow(clippy::suspicious_arithmetic_impl)] { self.vector += right.vector }; );
 
 add_sub_assign_impl!(DivAssign, div_assign, ClosedSub;
     (D, U1), (D, U1) for D: DimName;
     self: Translation<N, D>, right: &'b Translation<N, D>;
-    self.vector -= &right.vector; 'b);
+    #[allow(clippy::suspicious_arithmetic_impl)] { self.vector -= &right.vector };
+    'b);
 
 add_sub_assign_impl!(DivAssign, div_assign, ClosedSub;
     (D, U1), (D, U1) for D: DimName;
     self: Translation<N, D>, right: Translation<N, D>;
-    self.vector -= right.vector; );
-
-/*
-// Translation × Matrix
-add_sub_impl!(Mul, mul;
-         (D1, D1), (R2, C2) for D1, R2, C2;
-         self: &'a Translation<N, D1>, right: &'b Matrix<N, R2, C2>, Output = MatrixMN<N, D1, C2>;
-         self.vector() * right; 'a, 'b);
-
-add_sub_impl!(Mul, mul;
-         (D1, D1), (R2, C2) for D1, R2, C2;
-         self: &'a Translation<N, D1>, right: Matrix<N, R2, C2>, Output = MatrixMN<N, D1, C2>;
-         self.vector() * right; 'a);
-
-add_sub_impl!(Mul, mul;
-         (D1, D1), (R2, C2) for D1, R2, C2;
-         self: Translation<N, D1>, right: &'b Matrix<N, R2, C2>, Output = MatrixMN<N, D1, C2>;
-         self.unwrap() * right; 'b);
-
-add_sub_impl!(Mul, mul;
-         (D1, D1), (R2, C2) for D1, R2, C2;
-         self: Translation<N, D1>, right: Matrix<N, R2, C2>, Output = MatrixMN<N, D1, C2>;
-         self.unwrap() * right; );
-
-// Matrix × Translation
-add_sub_impl!(Mul, mul;
-         (R1, C1), (D2, D2) for R1, C1, D2;
-         self: &'a Matrix<N, R1, C1>, right: &'b Translation<N, D2>, Output = MatrixMN<N, R1, D2>;
-         self * right.vector(); 'a, 'b);
-
-add_sub_impl!(Mul, mul;
-         (R1, C1), (D2, D2) for R1, C1, D2;
-         self: &'a Matrix<N, R1, C1>, right: Translation<N, D2>, Output = MatrixMN<N, R1, D2>;
-         self * right.unwrap(); 'a);
-
-add_sub_impl!(Mul, mul;
-         (R1, C1), (D2, D2) for R1, C1, D2;
-         self: Matrix<N, R1, C1>, right: &'b Translation<N, D2>, Output = MatrixMN<N, R1, D2>;
-         self * right.vector(); 'b);
-
-
-add_sub_impl!(Mul, mul;
-         (R1, C1), (D2, D2) for R1, C1, D2;
-         self: Matrix<N, R1, C1>, right: Translation<N, D2>, Output = MatrixMN<N, R1, D2>;
-         self * right.unwrap(); );
-
-// Matrix *= Translation
-md_assign_impl!(MulAssign, mul_assign;
-                (R1, C1), (C1, C1) for R1, C1;
-                self: Matrix<N, R1, C1>, right: &'b Translation<N, C1>;
-                self.mul_assign(right.vector()); 'b);
-
-md_assign_impl!(MulAssign, mul_assign;
-                (R1, C1), (C1, C1) for R1, C1;
-                self: Matrix<N, R1, C1>, right: Translation<N, C1>;
-                self.mul_assign(right.unwrap()); );
-
-
-md_assign_impl!(DivAssign, div_assign;
-                (R1, C1), (C1, C1) for R1, C1;
-                self: Matrix<N, R1, C1>, right: &'b Translation<N, C1>;
-                self.mul_assign(right.inverse().vector()); 'b);
-
-md_assign_impl!(DivAssign, div_assign;
-                (R1, C1), (C1, C1) for R1, C1;
-                self: Matrix<N, R1, C1>, right: Translation<N, C1>;
-                self.mul_assign(right.inverse().unwrap()); );
-*/
+    #[allow(clippy::suspicious_arithmetic_impl)] { self.vector -= right.vector }; );
diff --git a/src/geometry/unit_complex_ops.rs b/src/geometry/unit_complex_ops.rs
index f7af70887..af1a32f1b 100644
--- a/src/geometry/unit_complex_ops.rs
+++ b/src/geometry/unit_complex_ops.rs
@@ -96,6 +96,7 @@ where
 
     #[inline]
     fn div(self, rhs: Self) -> Self::Output {
+        #[allow(clippy::suspicious_arithmetic_impl)]
         Unit::new_unchecked(self.into_inner() * rhs.conjugate().into_inner())
     }
 }
@@ -108,6 +109,7 @@ where
 
     #[inline]
     fn div(self, rhs: UnitComplex<N>) -> Self::Output {
+        #[allow(clippy::suspicious_arithmetic_impl)]
         Unit::new_unchecked(self.complex() * rhs.conjugate().into_inner())
     }
 }
@@ -120,6 +122,7 @@ where
 
     #[inline]
     fn div(self, rhs: &'b UnitComplex<N>) -> Self::Output {
+        #[allow(clippy::suspicious_arithmetic_impl)]
         Unit::new_unchecked(self.into_inner() * rhs.conjugate().into_inner())
     }
 }
@@ -132,6 +135,7 @@ where
 
     #[inline]
     fn div(self, rhs: &'b UnitComplex<N>) -> Self::Output {
+        #[allow(clippy::suspicious_arithmetic_impl)]
         Unit::new_unchecked(self.complex() * rhs.conjugate().into_inner())
     }
 }
@@ -206,7 +210,7 @@ complex_op_impl_all!(
     [val val] => &self / &rhs;
     [ref val] =>  self / &rhs;
     [val ref] => &self /  rhs;
-    [ref ref] =>  self * UnitComplex::from_rotation_matrix(rhs).inverse();
+    [ref ref] => #[allow(clippy::suspicious_arithmetic_impl)] { self * UnitComplex::from_rotation_matrix(rhs).inverse() };
 );
 
 // Rotation × UnitComplex
@@ -228,7 +232,7 @@ complex_op_impl_all!(
     [val val] => &self / &rhs;
     [ref val] =>  self / &rhs;
     [val ref] => &self /  rhs;
-    [ref ref] => UnitComplex::from_rotation_matrix(self) * rhs.inverse();
+    [ref ref] => #[allow(clippy::suspicious_arithmetic_impl)] { UnitComplex::from_rotation_matrix(self) * rhs.inverse() };
 );
 
 // UnitComplex × Point

From d990aff44e68869719251d564ffe9a4beac9c1f8 Mon Sep 17 00:00:00 2001
From: Philippe Renon <philippe_renon@yahoo.fr>
Date: Sun, 25 Oct 2020 18:38:50 +0100
Subject: [PATCH 2/2] clippy: fix clippy::eq_op error (false positive)

---
 src/geometry/quaternion.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/geometry/quaternion.rs b/src/geometry/quaternion.rs
index 22ee5309b..69d549670 100755
--- a/src/geometry/quaternion.rs
+++ b/src/geometry/quaternion.rs
@@ -389,6 +389,7 @@ where
     /// ```
     #[inline]
     pub fn outer(&self, other: &Self) -> Self {
+        #[allow(clippy::eq_op)]
         (self * other - other * self).half()
     }