Remove CUDA support relying on abandoned toolchain

.github/workflows/nalgebra-ci-build.yml

@@ -49,8 +49,6 @@ jobs:
   build-nalgebra-all-features:
     runs-on: ubuntu-latest
     steps:
-      # Needed because the --all-features build which enables cuda support.
-      - uses: Jimver/[email protected]
       - uses: actions/checkout@v2
       - run: cargo build --all-features;
       - run: cargo build -p nalgebra-glm --all-features;
@@ -120,23 +118,6 @@ jobs:
         run: xargo build --verbose --no-default-features -p nalgebra-glm --target=x86_64-unknown-linux-gnu;
       - name: build thumbv7em-none-eabihf nalgebra-glm
         run: xargo build --verbose --no-default-features -p nalgebra-glm --target=thumbv7em-none-eabihf;
-  build-cuda:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: Jimver/[email protected]
-        with:
-          cuda: '11.5.0'
-      - name: Install nightly-2021-12-04
-        uses: actions-rs/toolchain@v1
-        with:
-          toolchain: nightly-2021-12-04
-          override: true
-      - uses: actions/checkout@v2
-      - run: rustup target add nvptx64-nvidia-cuda
-      - run: cargo build --no-default-features --features cuda
-      - run: cargo build --no-default-features --features cuda --target=nvptx64-nvidia-cuda
-        env: 
-          CUDA_ARCH: "350"
   docs:
     runs-on: ubuntu-latest
     steps:

CHANGELOG.md

@@ -4,6 +4,12 @@ documented here.
 
 This project adheres to [Semantic Versioning](https://semver.org/).
 
+## Unreleased
+
+### Removed
+- The `cuda` feature has been removed, as the toolchain it depends on
+  is long abandoned.
+
 ## [0.32.3] (09 July 2023)
 
 ### Modified

Cargo.toml

@@ -32,7 +32,6 @@ compare = [ "matrixcompare-core" ]
 libm    = [ "simba/libm" ]
 libm-force = [ "simba/libm_force" ]
 macros = [ "nalgebra-macros" ]
-cuda   = [ "cust_core", "simba/cuda" ]
 
 
 # Conversion

nalgebra-glm/Cargo.toml

@@ -21,7 +21,6 @@ default               = [ "std" ]
 std                   = [ "nalgebra/std", "simba/std" ]
 arbitrary             = [ "nalgebra/arbitrary" ]
 serde-serialize       = [ "nalgebra/serde-serialize-no-std" ]
-cuda                  = [ "nalgebra/cuda" ]
 
 # Conversion
 convert-mint = [ "nalgebra/mint" ]

src/base/array_storage.rs

@@ -42,7 +42,6 @@ use std::mem;
     )
 )]
 #[cfg_attr(feature = "rkyv-serialize", derive(bytecheck::CheckBytes))]
-#[cfg_attr(feature = "cuda", derive(cust_core::DeviceCopy))]
 pub struct ArrayStorage<T, const R: usize, const C: usize>(pub [[T; R]; C]);
 
 impl<T, const R: usize, const C: usize> ArrayStorage<T, R, C> {

src/base/dimension.rs

@@ -23,7 +23,6 @@ use serde::{Deserialize, Deserializer, Serialize, Serializer};
     feature = "rkyv-serialize",
     archive_attr(derive(bytecheck::CheckBytes))
 )]
-#[cfg_attr(feature = "cuda", derive(cust_core::DeviceCopy))]
 pub struct Dyn(pub usize);
 
 #[deprecated(note = "use Dyn instead.")]
@@ -216,7 +215,6 @@ dim_ops!(
     archive(as = "Self")
 )]
 #[cfg_attr(feature = "rkyv-serialize", derive(bytecheck::CheckBytes))]
-#[cfg_attr(feature = "cuda", derive(cust_core::DeviceCopy))]
 pub struct Const<const R: usize>;
 
 /// Trait implemented exclusively by type-level integers.

src/base/matrix.rs

@@ -171,7 +171,6 @@ pub type MatrixCross<T, R1, C1, R2, C2> =
     )
 )]
 #[cfg_attr(feature = "rkyv-serialize", derive(bytecheck::CheckBytes))]
-#[cfg_attr(feature = "cuda", derive(cust_core::DeviceCopy))]
 pub struct Matrix<T, R, C, S> {
     /// The data storage that contains all the matrix components. Disappointed?
     ///

src/base/unit.rs

@@ -35,7 +35,6 @@ use rkyv::bytecheck;
     )
 )]
 #[cfg_attr(feature = "rkyv-serialize", derive(bytecheck::CheckBytes))]
-// #[cfg_attr(feature = "cuda", derive(cust_core::DeviceCopy))]
 pub struct Unit<T> {
     pub(crate) value: T,
 }
@@ -72,16 +71,6 @@ impl<'de, T: Deserialize<'de>> Deserialize<'de> for Unit<T> {
     }
 }
 
-#[cfg(feature = "cuda")]
-unsafe impl<T: cust_core::DeviceCopy, R, C, S> cust_core::DeviceCopy for Unit<Matrix<T, R, C, S>>
-where
-    T: Scalar,
-    R: Dim,
-    C: Dim,
-    S: RawStorage<T, R, C> + Copy,
-{
-}
-
 impl<T, R, C, S> PartialEq for Unit<Matrix<T, R, C, S>>
 where
     T: Scalar + PartialEq,

src/geometry/dual_quaternion.rs

@@ -55,7 +55,6 @@ use simba::scalar::{ClosedNeg, RealField};
     )
 )]
 #[cfg_attr(feature = "rkyv-serialize", derive(bytecheck::CheckBytes))]
-#[cfg_attr(feature = "cuda", derive(cust_core::DeviceCopy))]
 pub struct DualQuaternion<T> {
     /// The real component of the quaternion
     pub real: Quaternion<T>,

src/geometry/isometry.rs

@@ -54,7 +54,6 @@ use rkyv::bytecheck;
 ///
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]
-#[cfg_attr(feature = "cuda", derive(cust_core::DeviceCopy))]
 #[cfg_attr(feature = "serde-serialize-no-std", derive(Serialize, Deserialize))]
 #[cfg_attr(
     feature = "serde-serialize-no-std",

src/geometry/orthographic.rs

@@ -34,7 +34,6 @@ use rkyv::bytecheck;
     )
 )]
 #[cfg_attr(feature = "rkyv-serialize", derive(bytecheck::CheckBytes))]
-#[cfg_attr(feature = "cuda", derive(cust_core::DeviceCopy))]
 #[derive(Copy, Clone)]
 pub struct Orthographic3<T> {
     matrix: Matrix4<T>,

src/geometry/perspective.rs

@@ -35,7 +35,6 @@ use rkyv::bytecheck;
     )
 )]
 #[cfg_attr(feature = "rkyv-serialize", derive(bytecheck::CheckBytes))]
-#[cfg_attr(feature = "cuda", derive(cust_core::DeviceCopy))]
 #[derive(Copy, Clone)]
 pub struct Perspective3<T> {
     matrix: Matrix4<T>,

src/geometry/point.rs

@@ -86,14 +86,6 @@ where
 {
 }
 
-#[cfg(feature = "cuda")]
-unsafe impl<T: Scalar + cust_core::DeviceCopy, D: DimName> cust_core::DeviceCopy for OPoint<T, D>
-where
-    DefaultAllocator: Allocator<T, D>,
-    OVector<T, D>: cust_core::DeviceCopy,
-{
-}
-
 #[cfg(feature = "bytemuck")]
 unsafe impl<T: Scalar, D: DimName> bytemuck::Zeroable for OPoint<T, D>
 where

src/geometry/point_construction.rs

@@ -202,29 +202,11 @@ impl<T: Scalar> Point1<T> {
     /// assert_eq!(p.x, 1.0);
     /// ```
     #[inline]
-    #[cfg(not(feature = "cuda"))]
     pub const fn new(x: T) -> Self {
         Point {
             coords: Vector1::new(x),
         }
     }
-
-    /// Initializes this point from its components.
-    ///
-    /// # Example
-    ///
-    /// ```
-    /// # use nalgebra::Point1;
-    /// let p = Point1::new(1.0);
-    /// assert_eq!(p.x, 1.0);
-    /// ```
-    #[inline]
-    #[cfg(feature = "cuda")]
-    pub fn new(x: T) -> Self {
-        Point {
-            coords: Vector1::new(x),
-        }
-    }
 }
 macro_rules! componentwise_constructors_impl(
     ($($doc: expr; $Point: ident, $Vector: ident, $($args: ident:$irow: expr),*);* $(;)*) => {$(
@@ -234,22 +216,9 @@ macro_rules! componentwise_constructors_impl(
             #[doc = $doc]
             #[doc = "```"]
             #[inline]
-            #[cfg(not(feature = "cuda"))]
             pub const fn new($($args: T),*) -> Self {
                 Point { coords: $Vector::new($($args),*) }
             }
-
-            // TODO: always let new be const once CUDA updates its supported
-            //       nightly version to something more recent.
-            #[doc = "Initializes this point from its components."]
-            #[doc = "# Example\n```"]
-            #[doc = $doc]
-            #[doc = "```"]
-            #[inline]
-            #[cfg(feature = "cuda")]
-            pub fn new($($args: T),*) -> Self {
-                Point { coords: $Vector::new($($args),*) }
-            }
         }
     )*}
 );

src/geometry/quaternion.rs

@@ -38,7 +38,6 @@ use rkyv::bytecheck;
     )
 )]
 #[cfg_attr(feature = "rkyv-serialize", derive(bytecheck::CheckBytes))]
-#[cfg_attr(feature = "cuda", derive(cust_core::DeviceCopy))]
 pub struct Quaternion<T> {
     /// This quaternion as a 4D vector of coordinates in the `[ x, y, z, w ]` storage order.
     pub coords: Vector4<T>,
@@ -1016,9 +1015,6 @@ impl<T: RealField + fmt::Display> fmt::Display for Quaternion<T> {
 /// A unit quaternions. May be used to represent a rotation.
 pub type UnitQuaternion<T> = Unit<Quaternion<T>>;
 
-#[cfg(feature = "cuda")]
-unsafe impl<T: cust_core::DeviceCopy> cust_core::DeviceCopy for UnitQuaternion<T> {}
-
 impl<T: Scalar + ClosedNeg + PartialEq> PartialEq for UnitQuaternion<T> {
     #[inline]
     fn eq(&self, rhs: &Self) -> bool {

src/geometry/rotation.rs

@@ -64,7 +64,6 @@ use rkyv::bytecheck;
     )
 )]
 #[cfg_attr(feature = "rkyv-serialize", derive(bytecheck::CheckBytes))]
-#[cfg_attr(feature = "cuda", derive(cust_core::DeviceCopy))]
 #[derive(Copy, Clone)]
 pub struct Rotation<T, const D: usize> {
     matrix: SMatrix<T, D, D>,

src/geometry/scale.rs

@@ -32,7 +32,6 @@ use rkyv::bytecheck;
     )
 )]
 #[cfg_attr(feature = "rkyv-serialize", derive(bytecheck::CheckBytes))]
-#[cfg_attr(feature = "cuda", derive(cust_core::DeviceCopy))]
 #[derive(Copy, Clone)]
 pub struct Scale<T, const D: usize> {
     /// The scale coordinates, i.e., how much is multiplied to a point's coordinates when it is

src/geometry/similarity.rs

@@ -21,7 +21,6 @@ use rkyv::bytecheck;
 /// A similarity, i.e., an uniform scaling, followed by a rotation, followed by a translation.
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]
-#[cfg_attr(feature = "cuda", derive(cust_core::DeviceCopy))]
 #[cfg_attr(feature = "serde-serialize-no-std", derive(Serialize, Deserialize))]
 #[cfg_attr(
     feature = "serde-serialize-no-std",

src/geometry/transform.rs

@@ -60,17 +60,14 @@ where
 
 /// Tag representing the most general (not necessarily inversible) `Transform` type.
 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
-#[cfg_attr(feature = "cuda", derive(cust_core::DeviceCopy))]
 pub enum TGeneral {}
 
 /// Tag representing the most general inversible `Transform` type.
 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
-#[cfg_attr(feature = "cuda", derive(cust_core::DeviceCopy))]
 pub enum TProjective {}
 
 /// Tag representing an affine `Transform`. Its bottom-row is equal to `(0, 0 ... 0, 1)`.
 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
-#[cfg_attr(feature = "cuda", derive(cust_core::DeviceCopy))]
 pub enum TAffine {}
 
 impl TCategory for TGeneral {
@@ -198,16 +195,6 @@ where
 {
 }
 
-#[cfg(feature = "cuda")]
-unsafe impl<T: RealField + cust_core::DeviceCopy, C: TCategory, const D: usize>
-    cust_core::DeviceCopy for Transform<T, C, D>
-where
-    Const<D>: DimNameAdd<U1>,
-    DefaultAllocator: Allocator<T, DimNameSum<Const<D>, U1>, DimNameSum<Const<D>, U1>>,
-    Owned<T, DimNameSum<Const<D>, U1>, DimNameSum<Const<D>, U1>>: cust_core::DeviceCopy,
-{
-}
-
 impl<T: RealField, C: TCategory, const D: usize> Clone for Transform<T, C, D>
 where
     Const<D>: DimNameAdd<U1>,

src/geometry/translation.rs

@@ -32,7 +32,6 @@ use rkyv::bytecheck;
     )
 )]
 #[cfg_attr(feature = "rkyv-serialize", derive(bytecheck::CheckBytes))]
-#[cfg_attr(feature = "cuda", derive(cust_core::DeviceCopy))]
 #[derive(Copy, Clone)]
 pub struct Translation<T, const D: usize> {
     /// The translation coordinates, i.e., how much is added to a point's coordinates when it is

src/geometry/unit_complex.rs

@@ -31,9 +31,6 @@ use std::cmp::{Eq, PartialEq};
 /// * [Conversion to a matrix <span style="float:right;">`to_rotation_matrix`, `to_homogeneous`…</span>](#conversion-to-a-matrix)
 pub type UnitComplex<T> = Unit<Complex<T>>;
 
-#[cfg(feature = "cuda")]
-unsafe impl<T: cust_core::DeviceCopy> cust_core::DeviceCopy for UnitComplex<T> {}
-
 impl<T: Scalar + PartialEq> PartialEq for UnitComplex<T> {
     #[inline]
     fn eq(&self, rhs: &Self) -> bool {