Implement AsRef, AsMut, From for vectors and matrices.

This allows pointer conversion between arrays and vectors or matrices.
Those implementations replace the `.as_array()` and `.as_array_mut()` method.

src/structs/mat.rs

@@ -45,7 +45,7 @@ eye_impl!(Mat1, 1, m11);
 
 mat_impl!(Mat1, m11);
 repeat_impl!(Mat1, m11);
-as_array_impl!(Mat1, 1);
+conversion_impl!(Mat1, 1);
 mat_cast_impl!(Mat1, m11);
 add_impl!(Mat1, m11);
 sub_impl!(Mat1, m11);
@@ -96,7 +96,7 @@ mat_impl!(Mat2, m11, m12,
                 m21, m22);
 repeat_impl!(Mat2, m11, m12,
                    m21, m22);
-as_array_impl!(Mat2, 2);
+conversion_impl!(Mat2, 2);
 mat_cast_impl!(Mat2, m11, m12,
                      m21, m22);
 add_impl!(Mat2, m11, m12, m21, m22);
@@ -152,7 +152,7 @@ mat_impl!(Mat3, m11, m12, m13,
 repeat_impl!(Mat3, m11, m12, m13,
                    m21, m22, m23,
                    m31, m32, m33);
-as_array_impl!(Mat3, 3);
+conversion_impl!(Mat3, 3);
 mat_cast_impl!(Mat3, m11, m12, m13,
                      m21, m22, m23,
                      m31, m32, m33);
@@ -255,7 +255,7 @@ repeat_impl!(Mat4,
   m31, m32, m33, m34,
   m41, m42, m43, m44
 );
-as_array_impl!(Mat4, 4);
+conversion_impl!(Mat4, 4);
 mat_cast_impl!(Mat4,
   m11, m12, m13, m14,
   m21, m22, m23, m24,
@@ -377,7 +377,7 @@ repeat_impl!(Mat5,
   m41, m42, m43, m44, m45,
   m51, m52, m53, m54, m55
 );
-as_array_impl!(Mat5, 5);
+conversion_impl!(Mat5, 5);
 mat_cast_impl!(Mat5,
   m11, m12, m13, m14, m15,
   m21, m22, m23, m24, m25,
@@ -516,7 +516,7 @@ repeat_impl!(Mat6,
   m51, m52, m53, m54, m55, m56,
   m61, m62, m63, m64, m65, m66
 );
-as_array_impl!(Mat6, 6);
+conversion_impl!(Mat6, 6);
 mat_cast_impl!(Mat6,
   m11, m12, m13, m14, m15, m16,
   m21, m22, m23, m24, m25, m26,

src/structs/mat_macros.rs

@@ -13,43 +13,40 @@ macro_rules! mat_impl(
   )
 );
 
-macro_rules! as_array_impl(
+macro_rules! conversion_impl(
     ($t: ident, $dim: expr) => (
-        impl<N> $t<N> {
+        impl<N> AsRef<[[N; $dim]; $dim]> for $t<N> {
-            /// View this matrix as a column-major array of arrays.
             #[inline]
-            pub fn as_array(&self) -> &[[N; $dim]; $dim] {
+            fn as_ref(&self) -> &[[N; $dim]; $dim] {
                 unsafe {
                     mem::transmute(self)
                 }
             }
+        }
 
-            /// View this matrix as a column-major mutable array of arrays.
+        impl<N> AsMut<[[N; $dim]; $dim]> for $t<N> {
             #[inline]
-            pub fn as_array_mut<'a>(&'a mut self) -> &'a mut [[N; $dim]; $dim] {
+            fn as_mut(&mut self) -> &mut [[N; $dim]; $dim] {
                 unsafe {
                     mem::transmute(self)
                 }
             }
+        }
 
-            // FIXME: because of https://github.com/rust-lang/rust/issues/16418 we cannot do the
+        impl<'a, N> From<&'a [[N; $dim]; $dim]> for &'a $t<N> {
-            // array-to-mat conversion by-value:
-            //
-            // pub fn from_array(array: [N; $dim]) -> $t<N>
-
-            /// View a column-major array of array as a vector.
             #[inline]
-            pub fn from_array_ref(array: &[[N; $dim]; $dim]) -> &$t<N> {
+            fn from(arr: &'a [[N; $dim]; $dim]) -> &'a $t<N> {
                 unsafe {
-                    mem::transmute(array)
+                    mem::transmute(arr)
                 }
             }
+        }
 
-            /// View a column-major array of array as a mutable vector.
+        impl<'a, N> From<&'a mut [[N; $dim]; $dim]> for &'a mut $t<N> {
             #[inline]
-            pub fn from_array_mut(array: &mut [[N; $dim]; $dim]) -> &mut $t<N> {
+            fn from(arr: &'a mut [[N; $dim]; $dim]) -> &'a mut $t<N> {
                 unsafe {
-                    mem::transmute(array)
+                    mem::transmute(arr)
                 }
             }
         }
@@ -325,7 +322,7 @@ macro_rules! col_slice_impl(
             fn col_slice(&self, cid: usize, rstart: usize, rend: usize) -> $slice<N> {
                 let col = self.col(cid);
 
-                $slice::from_slice(rend - rstart, &col.as_array()[rstart .. rend])
+                $slice::from_slice(rend - rstart, &col.as_ref()[rstart .. rend])
             }
         }
     )
@@ -366,7 +363,7 @@ macro_rules! row_slice_impl(
             fn row_slice(&self, rid: usize, cstart: usize, cend: usize) -> $slice<N> {
                 let row = self.row(rid);
 
-                $slice::from_slice(cend - cstart, &row.as_array()[cstart .. cend])
+                $slice::from_slice(cend - cstart, &row.as_ref()[cstart .. cend])
             }
         }
     )

src/structs/pnt.rs

@@ -54,7 +54,7 @@ scalar_div_impl!(Pnt1, x);
 scalar_add_impl!(Pnt1, x);
 scalar_sub_impl!(Pnt1, x);
 vec_cast_impl!(Pnt1, x);
-as_array_impl!(Pnt1, 1);
+conversion_impl!(Pnt1, 1);
 index_impl!(Pnt1);
 indexable_impl!(Pnt1, 1);
 at_fast_impl!(Pnt1, 1);
@@ -96,7 +96,7 @@ scalar_div_impl!(Pnt2, x, y);
 scalar_add_impl!(Pnt2, x, y);
 scalar_sub_impl!(Pnt2, x, y);
 vec_cast_impl!(Pnt2, x, y);
-as_array_impl!(Pnt2, 2);
+conversion_impl!(Pnt2, 2);
 index_impl!(Pnt2);
 indexable_impl!(Pnt2, 2);
 at_fast_impl!(Pnt2, 2);
@@ -140,7 +140,7 @@ scalar_div_impl!(Pnt3, x, y, z);
 scalar_add_impl!(Pnt3, x, y, z);
 scalar_sub_impl!(Pnt3, x, y, z);
 vec_cast_impl!(Pnt3, x, y, z);
-as_array_impl!(Pnt3, 3);
+conversion_impl!(Pnt3, 3);
 index_impl!(Pnt3);
 indexable_impl!(Pnt3, 3);
 at_fast_impl!(Pnt3, 3);
@@ -186,7 +186,7 @@ scalar_div_impl!(Pnt4, x, y, z, w);
 scalar_add_impl!(Pnt4, x, y, z, w);
 scalar_sub_impl!(Pnt4, x, y, z, w);
 vec_cast_impl!(Pnt4, x, y, z, w);
-as_array_impl!(Pnt4, 4);
+conversion_impl!(Pnt4, 4);
 index_impl!(Pnt4);
 indexable_impl!(Pnt4, 4);
 at_fast_impl!(Pnt4, 4);
@@ -234,7 +234,7 @@ scalar_div_impl!(Pnt5, x, y, z, w, a);
 scalar_add_impl!(Pnt5, x, y, z, w, a);
 scalar_sub_impl!(Pnt5, x, y, z, w, a);
 vec_cast_impl!(Pnt5, x, y, z, w, a);
-as_array_impl!(Pnt5, 5);
+conversion_impl!(Pnt5, 5);
 index_impl!(Pnt5);
 indexable_impl!(Pnt5, 5);
 at_fast_impl!(Pnt5, 5);
@@ -284,7 +284,7 @@ scalar_div_impl!(Pnt6, x, y, z, w, a, b);
 scalar_add_impl!(Pnt6, x, y, z, w, a, b);
 scalar_sub_impl!(Pnt6, x, y, z, w, a, b);
 vec_cast_impl!(Pnt6, x, y, z, w, a, b);
-as_array_impl!(Pnt6, 6);
+conversion_impl!(Pnt6, 6);
 index_impl!(Pnt6);
 indexable_impl!(Pnt6, 6);
 at_fast_impl!(Pnt6, 6);

src/structs/quat.rs

@@ -518,7 +518,7 @@ impl<N: Arbitrary + BaseFloat> Arbitrary for UnitQuat<N> {
 ord_impl!(Quat, w, i, j, k);
 vec_axis_impl!(Quat, w, i, j, k);
 vec_cast_impl!(Quat, w, i, j, k);
-as_array_impl!(Quat, 4);
+conversion_impl!(Quat, 4);
 index_impl!(Quat);
 indexable_impl!(Quat, 4);
 at_fast_impl!(Quat, 4);

src/structs/vec.rs

@@ -52,7 +52,7 @@ new_impl!(Vec1, x);
 ord_impl!(Vec1, x,);
 vec_axis_impl!(Vec1, x);
 vec_cast_impl!(Vec1, x);
-as_array_impl!(Vec1, 1);
+conversion_impl!(Vec1, 1);
 index_impl!(Vec1);
 indexable_impl!(Vec1, 1);
 at_fast_impl!(Vec1, 1);
@@ -105,7 +105,7 @@ new_impl!(Vec2, x, y);
 ord_impl!(Vec2, x, y);
 vec_axis_impl!(Vec2, x, y);
 vec_cast_impl!(Vec2, x, y);
-as_array_impl!(Vec2, 2);
+conversion_impl!(Vec2, 2);
 index_impl!(Vec2);
 indexable_impl!(Vec2, 2);
 at_fast_impl!(Vec2, 2);
@@ -160,7 +160,7 @@ new_impl!(Vec3, x, y, z);
 ord_impl!(Vec3, x, y, z);
 vec_axis_impl!(Vec3, x, y, z);
 vec_cast_impl!(Vec3, x, y, z);
-as_array_impl!(Vec3, 3);
+conversion_impl!(Vec3, 3);
 index_impl!(Vec3);
 indexable_impl!(Vec3, 3);
 at_fast_impl!(Vec3, 3);
@@ -218,7 +218,7 @@ new_impl!(Vec4, x, y, z, w);
 ord_impl!(Vec4, x, y, z, w);
 vec_axis_impl!(Vec4, x, y, z, w);
 vec_cast_impl!(Vec4, x, y, z, w);
-as_array_impl!(Vec4, 4);
+conversion_impl!(Vec4, 4);
 index_impl!(Vec4);
 indexable_impl!(Vec4, 4);
 at_fast_impl!(Vec4, 4);
@@ -277,7 +277,7 @@ new_impl!(Vec5, x, y, z, w, a);
 ord_impl!(Vec5, x, y, z, w, a);
 vec_axis_impl!(Vec5, x, y, z, w, a);
 vec_cast_impl!(Vec5, x, y, z, w, a);
-as_array_impl!(Vec5, 5);
+conversion_impl!(Vec5, 5);
 index_impl!(Vec5);
 indexable_impl!(Vec5, 5);
 at_fast_impl!(Vec5, 5);
@@ -338,7 +338,7 @@ new_impl!(Vec6, x, y, z, w, a, b);
 ord_impl!(Vec6, x, y, z, w, a, b);
 vec_axis_impl!(Vec6, x, y, z, w, a, b);
 vec_cast_impl!(Vec6, x, y, z, w, a, b);
-as_array_impl!(Vec6, 6);
+conversion_impl!(Vec6, 6);
 index_impl!(Vec6);
 indexable_impl!(Vec6, 6);
 at_fast_impl!(Vec6, 6);

src/structs/vec_macros.rs

@@ -14,43 +14,40 @@ macro_rules! new_impl(
     );
 );
 
-macro_rules! as_array_impl(
+macro_rules! conversion_impl(
     ($t: ident, $dim: expr) => (
-        impl<N> $t<N> {
+        impl<N> AsRef<[N; $dim]> for $t<N> {
-            /// View this vector as an array.
             #[inline]
-            pub fn as_array(&self) -> &[N; $dim] {
+            fn as_ref(&self) -> &[N; $dim] {
                 unsafe {
                     mem::transmute(self)
                 }
             }
+        }
 
-            /// View this vector as a mutable array.
+        impl<N> AsMut<[N; $dim]> for $t<N> {
             #[inline]
-            pub fn as_array_mut(&mut self) -> &mut [N; $dim] {
+            fn as_mut(&mut self) -> &mut [N; $dim] {
                 unsafe {
                     mem::transmute(self)
                 }
             }
+        }
 
-            // FIXME: because of https://github.com/rust-lang/rust/issues/16418 we cannot do the
+        impl<'a, N> From<&'a [N; $dim]> for &'a $t<N> {
-            // array-to-vec conversion by-value:
-            //
-            // pub fn from_array(array: [N; $dim]) -> $t<N>
-
-            /// View an array as a vector.
             #[inline]
-            pub fn from_array_ref(array: &[N; $dim]) -> &$t<N> {
+            fn from(arr: &'a [N; $dim]) -> &'a $t<N> {
                 unsafe {
-                    mem::transmute(array)
+                    mem::transmute(arr)
                 }
             }
+        }
 
-            /// View an array as a vector.
+        impl<'a, N> From<&'a mut [N; $dim]> for &'a mut $t<N> {
             #[inline]
-            pub fn from_array_mut(array: &mut [N; $dim]) -> &mut $t<N> {
+            fn from(arr: &'a mut [N; $dim]) -> &'a mut $t<N> {
                 unsafe {
-                    mem::transmute(array)
+                    mem::transmute(arr)
                 }
             }
         }
@@ -63,13 +60,13 @@ macro_rules! at_fast_impl(
             /// Unsafe read access to a vector element by index.
             #[inline]
             pub unsafe fn at_fast(&self, i: usize) -> N {
-                (*self.as_array().get_unchecked(i))
+                (*self.as_ref().get_unchecked(i))
             }
 
             /// Unsafe write access to a vector element by index.
             #[inline]
             pub unsafe fn set_fast(&mut self, i: usize, val: N) {
-                (*self.as_array_mut().get_unchecked_mut(i)) = val
+                (*self.as_mut().get_unchecked_mut(i)) = val
             }
         }
     )
@@ -215,13 +212,13 @@ macro_rules! index_impl(
             type Output = N;
 
             fn index(&self, i: usize) -> &N {
-                &self.as_array()[i]
+                &self.as_ref()[i]
             }
         }
 
         impl<N> IndexMut<usize> for $t<N> {
             fn index_mut(&mut self, i: usize) -> &mut N {
-                &mut self.as_array_mut()[i]
+                &mut self.as_mut()[i]
             }
         }
     )