vector! and dvector! macros
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@ -131,3 +131,62 @@ pub fn dmatrix(stream: TokenStream) -> TokenStream {
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proc_macro::TokenStream::from(output)
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}
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struct Vector {
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elements: Vec<Expr>,
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}
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impl Vector {
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fn to_array_tokens(&self) -> TokenStream2 {
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let mut data = TokenStream2::new();
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data.append_separated(&self.elements, Punct::new(',', Spacing::Alone));
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TokenStream2::from(TokenTree::Group(Group::new(Delimiter::Bracket, data)))
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}
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fn len(&self) -> usize {
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self.elements.len()
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}
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}
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impl Parse for Vector {
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fn parse(input: ParseStream) -> Result<Self> {
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// The syntax of a vector is just the syntax of a single matrix row
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if input.is_empty() {
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Ok(Self {
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elements: Vec::new()
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})
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} else {
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let elements = MatrixRowSyntax::parse_separated_nonempty(input)?.into_iter().collect();
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Ok(Self {
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elements
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})
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}
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}
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}
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#[proc_macro]
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pub fn vector(stream: TokenStream) -> TokenStream {
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let vector = parse_macro_input!(stream as Vector);
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let len = vector.len();
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let array_tokens = vector.to_array_tokens();
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let output = quote! {
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nalgebra::SVector::<_, #len>
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::from_array_storage(nalgebra::ArrayStorage([#array_tokens]))
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};
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proc_macro::TokenStream::from(output)
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}
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#[proc_macro]
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pub fn dvector(stream: TokenStream) -> TokenStream {
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let vector = parse_macro_input!(stream as Vector);
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let len = vector.len();
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let array_tokens = vector.to_array_tokens();
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let output = quote! {
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nalgebra::DVector::<_>
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::from_vec_storage(nalgebra::VecStorage::new(
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nalgebra::Dynamic::new(#len),
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nalgebra::Const::<1>,
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vec!#array_tokens))
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};
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proc_macro::TokenStream::from(output)
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}
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@ -1,12 +1,12 @@
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use nalgebra_macros::{dmatrix, matrix};
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use nalgebra::{DMatrix, SMatrix, Matrix3x2, Matrix1x2, Matrix1x3, Matrix1x4, Matrix2x1, Matrix2, Matrix2x3, Matrix2x4, Matrix3x1, Matrix3, Matrix3x4, Matrix4x1, Matrix4x2, Matrix4x3, Matrix4};
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use nalgebra_macros::{dmatrix, dvector, matrix, vector};
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use nalgebra::{DMatrix, DVector, SMatrix, Matrix3x2, Matrix1x2, Matrix1x3, Matrix1x4, Matrix2x1, Matrix2, Matrix2x3, Matrix2x4, Matrix3x1, Matrix3, Matrix3x4, Matrix4x1, Matrix4x2, Matrix4x3, Matrix4, Vector1, Vector2, Vector3, Vector4, Vector5, SVector, Vector6};
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fn same_type<T>(_: &T, _: &T) {}
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fn check_statically_same_type<T>(_: &T, _: &T) {}
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/// Wrapper for `assert_eq` that also asserts that the types are the same
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macro_rules! assert_eq_and_type {
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($left:expr, $right:expr $(,)?) => {
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same_type(&$left, &$right);
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check_statically_same_type(&$left, &$right);
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assert_eq!($left, $right);
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};
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}
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@ -84,3 +84,34 @@ fn dmatrix_small_dims_exhaustive() {
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assert_eq_and_type!(dmatrix![1, 2, 3, 4; 5, 6, 7, 8; 9, 10, 11, 12; 13, 14, 15, 16],
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DMatrix::from_row_slice(4, 4, &[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]));
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}
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#[test]
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fn vector_small_dims_exhaustive() {
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assert_eq_and_type!(vector![], SVector::<i32, 0>::zeros());
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assert_eq_and_type!(vector![1], Vector1::<i32>::new(1));
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assert_eq_and_type!(vector![1, 2], Vector2::new(1, 2));
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assert_eq_and_type!(vector![1, 2, 3], Vector3::new(1, 2, 3));
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assert_eq_and_type!(vector![1, 2, 3, 4], Vector4::new(1, 2, 3, 4));
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assert_eq_and_type!(vector![1, 2, 3, 4, 5], Vector5::new(1, 2, 3, 4, 5));
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assert_eq_and_type!(vector![1, 2, 3, 4, 5, 6], Vector6::new(1, 2, 3, 4, 5, 6));
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}
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#[test]
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fn vector_const_fn() {
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// Ensure that vector! can be used in const contexts
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const _: SVector<i32, 0> = vector![];
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const _: Vector1<i32> = vector![1];
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const _: Vector2<i32> = vector![1, 2];
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const _: Vector6<i32> = vector![1, 2, 3, 4, 5, 6];
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}
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#[test]
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fn dvector_small_dims_exhaustive() {
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assert_eq_and_type!(dvector![], DVector::<i32>::zeros(0));
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assert_eq_and_type!(dvector![1], DVector::from_column_slice(&[1]));
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assert_eq_and_type!(dvector![1, 2], DVector::from_column_slice(&[1, 2]));
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assert_eq_and_type!(dvector![1, 2, 3], DVector::from_column_slice(&[1, 2, 3]));
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assert_eq_and_type!(dvector![1, 2, 3, 4], DVector::from_column_slice(&[1, 2, 3, 4]));
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assert_eq_and_type!(dvector![1, 2, 3, 4, 5], DVector::from_column_slice(&[1, 2, 3, 4, 5]));
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assert_eq_and_type!(dvector![1, 2, 3, 4, 5, 6], DVector::from_column_slice(&[1, 2, 3, 4, 5, 6]));
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}
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