Add Ord instances.

src/dim1/vec1.rs

@@ -10,7 +10,7 @@ use traits::sub_dot::SubDot;
 use traits::flatten::Flatten;
 use traits::workarounds::scalar_op::{ScalarMul, ScalarDiv, ScalarAdd, ScalarSub};
 
-#[deriving(Eq, ToStr)]
+#[deriving(Eq, Ord, ToStr)]
 pub struct Vec1<N>
 { x : N }
 

src/dim2/vec2.rs

@@ -12,7 +12,7 @@ use traits::flatten::Flatten;
 use traits::translation::Translation;
 use traits::workarounds::scalar_op::{ScalarMul, ScalarDiv, ScalarAdd, ScalarSub};
 
-#[deriving(Eq, ToStr)]
+#[deriving(Eq, Ord, ToStr)]
 pub struct Vec2<N>
 {
   x : N,

src/dim3/vec3.rs

@@ -11,7 +11,7 @@ use traits::flatten::Flatten;
 use traits::translation::Translation;
 use traits::workarounds::scalar_op::{ScalarMul, ScalarDiv, ScalarAdd, ScalarSub};
 
-#[deriving(Eq, ToStr)]
+#[deriving(Eq, Ord, ToStr)]
 pub struct Vec3<N>
 {
   x : N,

src/ndim/dvec.rs

@@ -11,7 +11,7 @@ use traits::norm::Norm;
 use traits::translation::Translation;
 use traits::workarounds::scalar_op::{ScalarMul, ScalarDiv, ScalarAdd, ScalarSub};
 
-#[deriving(Eq, ToStr, Clone)]
+#[deriving(Eq, Ord, ToStr, Clone)]
 pub struct DVec<N>
 {
   at: ~[N]

src/ndim/nvec.rs

@@ -21,7 +21,7 @@ use traits::workarounds::scalar_op::{ScalarMul, ScalarDiv, ScalarAdd, ScalarSub}
 // using d0, d1, d2, d3, ..., d7 (or your own dn) are prefered.
 // FIXME: it might be possible to implement type-level integers and use them
 // here?
-#[deriving(Eq, ToStr)]
+#[deriving(Eq, Ord, ToStr)]
 pub struct NVec<D, N>
 { at: DVec<N> }
 

src/traits/dim.rs

@@ -11,42 +11,42 @@ pub trait Dim {
 
 /// Dimensional token for 0-dimensions. Dimensional tokens are the preferred
 /// way to specify at the type level the dimension of n-dimensional objects.
-#[deriving(Eq, ToStr)]
+#[deriving(Eq, Ord, ToStr)]
 pub struct d0;
 
 /// Dimensional token for 1-dimension. Dimensional tokens are the preferred
 /// way to specify at the type level the dimension of n-dimensional objects.
-#[deriving(Eq, ToStr)]
+#[deriving(Eq, Ord, ToStr)]
 pub struct d1;
 
 /// Dimensional token for 2-dimensions. Dimensional tokens are the preferred
 /// way to specify at the type level the dimension of n-dimensional objects.
-#[deriving(Eq, ToStr)]
+#[deriving(Eq, Ord, ToStr)]
 pub struct d2;
 
 /// Dimensional token for 3-dimensions. Dimensional tokens are the preferred
 /// way to specify at the type level the dimension of n-dimensional objects.
-#[deriving(Eq, ToStr)]
+#[deriving(Eq, Ord, ToStr)]
 pub struct d3;
 
 /// Dimensional token for 4-dimensions. Dimensional tokens are the preferred
 /// way to specify at the type level the dimension of n-dimensional objects.
-#[deriving(Eq, ToStr)]
+#[deriving(Eq, Ord, ToStr)]
 pub struct d4;
 
 /// Dimensional token for 5-dimensions. Dimensional tokens are the preferred
 /// way to specify at the type level the dimension of n-dimensional objects.
-#[deriving(Eq, ToStr)]
+#[deriving(Eq, Ord, ToStr)]
 pub struct d5;
 
 /// Dimensional token for 6-dimensions. Dimensional tokens are the preferred
 /// way to specify at the type level the dimension of n-dimensional objects.
-#[deriving(Eq, ToStr)]
+#[deriving(Eq, Ord, ToStr)]
 pub struct d6;
 
 /// Dimensional token for 7-dimensions. Dimensional tokens are the preferred
 /// way to specify at the type level the dimension of n-dimensional objects.
-#[deriving(Eq, ToStr)]
+#[deriving(Eq, Ord, ToStr)]
 pub struct d7;
 
 impl Dim for d0