Add Vec0.

src/vec.rs

@@ -19,6 +19,44 @@ use traits::indexable::Indexable;
 
 mod vec_impl;
 
+#[deriving(Ord, ToStr)]
+pub struct Vec0<N>
+{ at: [N, ..0] }
+
+impl<N: Clone> Vec0<N>
+{
+  #[inline]
+  pub fn new_repeat(_: N) -> Vec0<N>
+  { Vec0 { at: [ ] } }
+}
+
+clone_impl!(Vec0)
+deep_clone_impl!(Vec0)
+new_impl!(Vec0, 0)
+indexable_impl!(Vec0)
+dim_impl!(Vec0, 0)
+eq_impl!(Vec0)
+// (specialized) basis_impl!(Vec0, 0)
+add_impl!(Vec0)
+sub_impl!(Vec0)
+neg_impl!(Vec0)
+dot_impl!(Vec0, 0)
+sub_dot_impl!(Vec0, 0)
+scalar_mul_impl!(Vec0, 0)
+scalar_div_impl!(Vec0, 0)
+scalar_add_impl!(Vec0, 0)
+scalar_sub_impl!(Vec0, 0)
+translation_impl!(Vec0)
+translatable_impl!(Vec0)
+norm_impl!(Vec0, 0)
+approx_eq_impl!(Vec0)
+zero_impl!(Vec0)
+one_impl!(Vec0)
+bounded_impl!(Vec0)
+iterable_impl!(Vec0)
+iterable_mut_impl!(Vec0)
+to_homogeneous_impl!(Vec0, Vec1)
+from_homogeneous_impl!(Vec1, Vec0, 1)
 
 #[deriving(Ord, ToStr)]
 pub struct Vec1<N>

src/vec_spec.rs

@@ -1,10 +1,28 @@
+use std::vec::{VecIterator, VecMutIterator};
+use std::iterator::FromIterator;
 use std::num::{Zero, One, abs};
 use traits::basis::Basis;
 use traits::cross::Cross;
 use traits::division_ring::DivisionRing;
 use traits::norm::Norm;
 use traits::sample::UniformSphereSample;
-use vec::{Vec1, Vec2, Vec3};
+use traits::iterable::FromAnyIterator;
+use vec::{Vec0, Vec1, Vec2, Vec3};
+
+impl<N: Clone> FromAnyIterator<N> for Vec0<N>
+{
+  fn from_iterator<'l>(_: &mut VecIterator<'l, N>) -> Vec0<N>
+  { Vec0 { at: [ ] } }
+
+  fn from_mut_iterator<'l>(_: &mut VecMutIterator<'l, N>) -> Vec0<N>
+  { Vec0 { at: [ ] } }
+}
+
+impl<N, Iter: Iterator<N>> FromIterator<N, Iter> for Vec0<N>
+{
+  fn from_iterator(_: &mut Iter) -> Vec0<N>
+  { Vec0 { at: [ ] } }
+}
 
 impl<N: Mul<N, N> + Sub<N, N>> Cross<Vec1<N>> for Vec2<N>
 {