Merge pull request #976 from saona-raimundo/dev

Implement conversion methods for RowDVector

CHANGELOG.md

@@ -4,6 +4,12 @@ documented here.
 
 This project adheres to [Semantic Versioning](https://semver.org/).
 
+## [0.29.1] - WIP
+
+### Added
+
+- The conversion trait `From<Vec<T>>` and method `from_vec_storage` for `RowDVector`. See [#975](https://github.com/dimforge/nalgebra/issues/975)
+
 ## [0.29.0]
 ### Breaking changes
 - We updated to the version 0.6 of `simba`. This means that the trait bounds `T: na::RealField`, `na::ComplexField`,
@@ -242,7 +248,7 @@ for details about this switch and its benefits.
    geometric types.
 ### Modified
  * Use of traits like `alga::general::{RealField, ComplexField}` have now been replaced by
-  `simba::scalar::{RealField, ComplexField}`.
+    `simba::scalar::{RealField, ComplexField}`.
  * The implementation of traits from the __alga__ crate (and well as the dependency to _alga__) are now
    omitted unless the `alga` cargo feature is activated.
 ### Removed
@@ -264,16 +270,16 @@ for details about this switch and its benefits.
 ### Added
   * `.remove_rows_at` and `remove_columns_at` which removes a set of rows or columns (specified by indices) from a matrix.
   * Several formatting traits have been implemented for all matrices/vectors: `LowerExp`, `UpperExp`, `Octal`, `LowerHex`,
-  `UpperHex`, `Binary`, `Pointer`.
+    `UpperHex`, `Binary`, `Pointer`.
   * `UnitQuaternion::quaternions_mean(...)` which computes the mean rotation of a set of unit quaternions. This implements
-  the algorithm from _Oshman, Yaakov, and Avishy Carmi, "Attitude estimation from vector observations using a genetic-algorithm-embedded quaternion particle filter."
+    the algorithm from _Oshman, Yaakov, and Avishy Carmi, "Attitude estimation from vector observations using a genetic-algorithm-embedded quaternion particle filter."
 
 ### Modified
   * It is now possible to get the `min/max` element of unsigned integer matrices.
 
 ### Added to nalgebra-glm
   * Some infinite and reversed perspectives: `::infinite_perspective_rh_no`, `::infinite_perspective_rh_zo`,
-  `::reversed_perspective_rh_zo`, and `::reversed_infinite_perspective_rh_zo`.
+    `::reversed_perspective_rh_zo`, and `::reversed_infinite_perspective_rh_zo`.
 
 ## [0.18.0]
 This release adds full complex number support to nalgebra. This includes all common vector/matrix operations as well
@@ -329,22 +335,22 @@ Note that all the other BLAS operation will continue to work for all fields, inc
   * Add `.slerp` and `.try_slerp` to unit vectors.
   * Add `.lerp` to vectors.
   * Add `.to_projective` and `.as_projective` to `Perspective3` and `Orthographic3` in order to
-  use them as `Projective3` structures.
+    use them as `Projective3` structures.
   * Add `From/Into` impls to allow the conversion of any transformation type to a matrix.
   * Add `Into` impls to convert a matrix slice into an owned matrix.
   * Add `Point*::from_slice` to create a point from a slice.
   * Add `.map_with_location` to matrices to apply a map which passes the component indices to the user-defined closure alongside
-  the component itself.
+    the component itself.
   * Add impl `From<Vector>` for `Point`.
   * Add impl `From<Vector4>` for `Quaternion`.
   * Add impl `From<Vector>` for `Translation`.
   * Add the `::from_vec` constructor to construct a matrix from a `Vec` (a `DMatrix` will reuse the original `Vec`
-  as-is for its storage).
+    as-is for its storage).
   * Add `.to_homogeneous` to square matrices (and with dimensions higher than 1x1). This will increase their number of row
-  and columns by 1. The new column and row are filled with 0, except for the diagonal element which is set to 1.
+    and columns by 1. The new column and row are filled with 0, except for the diagonal element which is set to 1.
   * Implement `Extend<Vec>` for matrices with a dynamic storage. The provided `Vec` is assumed to represent a column-major
-  matrix with the same number of rows as the one being extended. This will effectively append new columns on the right of
+    matrix with the same number of rows as the one being extended. This will effectively append new columns on the right of
-  the matrix being extended.
+    the matrix being extended.
   * Implement `Extend<Vec>` for vectors with a dynamic storage. This will concatenate the vector with the given `Vec`.
   * Implement `Extend<Matrix<...>>` for matrices with dynamic storage. This will concatenate the columns of both matrices.
   * Implement `Into<Vec>` for the `MatrixVec` storage.
@@ -353,10 +359,10 @@ Note that all the other BLAS operation will continue to work for all fields, inc
 
 ### Modified
   * The orthographic projection no longer require that `bottom < top`, that `left < right`, and that `znear < zfar`. The
-  only restriction now ith that they must not be equal (in which case the projection would be singular).
+    only restriction now ith that they must not be equal (in which case the projection would be singular).
   * The `Point::from_coordinates` methods is deprecated. Use `Point::from` instead.
   * The `.transform_point` and `.transform_vector` methods are now inherent methods for matrices so that the user does not have to
-  explicitly import the `Transform` trait from the alga crate.
+    explicitly import the `Transform` trait from the alga crate.
   * Renamed the matrix storage types: `MatrixArray` -> `ArrayStorage` and `MatrixVec` -> `VecStorage`.
   * Renamed `.unwrap()` to `.into_inner()` for geometric types that wrap another type.
     This is for the case of `Unit`, `Transform`, `Orthographic3`, `Perspective3`, `Rotation`.
@@ -552,8 +558,8 @@ overview of all the added/modified features.
 
 This version is a major rewrite of the library. Major changes are:
   * Algebraic traits are now defined by the [alga](https://crates.io/crates/alga) crate.
-  All other mathematical traits, except `Axpy` have been removed from
+    All other mathematical traits, except `Axpy` have been removed from
-  **nalgebra**.
+    **nalgebra**.
   * Methods are now preferred to free functions because they do not require any
     trait to be used anymore.
   * Most algebraic entities can be parametrized by type-level integers
@@ -746,11 +752,11 @@ you [there](https://users.nphysics.org)!
 
 ### Modified
   * Vectors are now multipliable with isometries. This will result into a pure rotation (this is how
-  vectors differ from point semantically: they design directions, so they are not translatable).
+    vectors differ from point semantically: they design directions, so they are not translatable).
   * `{Isometry3, Rotation3}::look_at` reimplemented and renamed to `::look_at_rh` and `::look_at_lh` to agree
-  with the computer graphics community (in particular, the GLM library). Use the `::look_at_rh`
+    with the computer graphics community (in particular, the GLM library). Use the `::look_at_rh`
-  variant to build a view matrix that
+    variant to build a view matrix that
-  may be successfully used with `Persp` and `Ortho`.
+    may be successfully used with `Persp` and `Ortho`.
   * The old `{Isometry3, Rotation3}::look_at` implementations are now called `::new_observer_frame`.
   * Rename every `fov` on `Persp` to `fovy`.
   * Fixed the perspective and orthographic projection matrices.

src/base/conversion.rs

@@ -20,7 +20,7 @@ use crate::base::{
     MatrixSliceMut, OMatrix, Scalar,
 };
 #[cfg(any(feature = "std", feature = "alloc"))]
-use crate::base::{DVector, VecStorage};
+use crate::base::{DVector, RowDVector, VecStorage};
 use crate::base::{SliceStorage, SliceStorageMut};
 use crate::constraint::DimEq;
 use crate::{IsNotStaticOne, RowSVector, SMatrix, SVector};
@@ -453,6 +453,14 @@ impl<'a, T: Scalar> From<Vec<T>> for DVector<T> {
     }
 }
 
+#[cfg(any(feature = "std", feature = "alloc"))]
+impl<'a, T: Scalar> From<Vec<T>> for RowDVector<T> {
+    #[inline]
+    fn from(vec: Vec<T>) -> Self {
+        Self::from_vec(vec)
+    }
+}
+
 impl<'a, T: Scalar + Copy, R: Dim, C: Dim, S: RawStorage<T, R, C> + IsContiguous>
     From<&'a Matrix<T, R, C, S>> for &'a [T]
 {

src/base/matrix.rs

@@ -32,7 +32,7 @@ use crate::{ArrayStorage, SMatrix, SimdComplexField, Storage, UninitMatrix};
 use crate::storage::IsContiguous;
 use crate::uninit::{Init, InitStatus, Uninit};
 #[cfg(any(feature = "std", feature = "alloc"))]
-use crate::{DMatrix, DVector, Dynamic, VecStorage};
+use crate::{DMatrix, DVector, Dynamic, RowDVector, VecStorage};
 use std::mem::MaybeUninit;
 
 /// A square matrix.
@@ -411,6 +411,21 @@ impl<T> DVector<T> {
     }
 }
 
+// TODO: Consider removing/deprecating `from_vec_storage` once we are able to make
+// `from_data` const fn compatible
+#[cfg(any(feature = "std", feature = "alloc"))]
+impl<T> RowDVector<T> {
+    /// Creates a new heap-allocated matrix from the given [`VecStorage`].
+    ///
+    /// This method exists primarily as a workaround for the fact that `from_data` can not
+    /// work in `const fn` contexts.
+    pub const fn from_vec_storage(storage: VecStorage<T, U1, Dynamic>) -> Self {
+        // This is sound because the dimensions of the matrix and the storage are guaranteed
+        // to be the same
+        unsafe { Self::from_data_statically_unchecked(storage) }
+    }
+}
+
 impl<T, R: Dim, C: Dim> UninitMatrix<T, R, C>
 where
     DefaultAllocator: Allocator<T, R, C>,