diff --git a/src/structs/spec/primitives.rs b/src/structs/spec/primitives.rs
index de9e6195..636bdf6b 100644
--- a/src/structs/spec/primitives.rs
+++ b/src/structs/spec/primitives.rs
@@ -1,219 +1,170 @@
 //! nalgebra trait implementation for primitive types.
 
-#![allow(missing_docs)]
-#![allow(non_camel_case_types)]
-
 use traits::structure::Cast;
 
-// Double dispatch traits to drive the Cast method for primitive types.
-macro_rules! primitive_double_dispatch_cast_decl_trait(
-    ($t: ident, $tcast: ident) => (
-        pub trait $tcast {
-            fn to(Self) -> $t;
-        }
-    )
-);
-
-macro_rules! primitive_double_dispatch_cast_impl(
-    ($ttarget: ident, $tself: ident, $tcast: ident) => (
-        impl $tcast for $tself{
+macro_rules! primitive_cast_impl(
+    ($from: ty, $to: ty) => (
+        impl Cast<$from> for $to {
             #[inline(always)]
-            fn to(v: $tself) -> $ttarget {
-                v as $ttarget
+            fn from(t: $from) -> $to {
+                t as $to
             }
         }
     )
 );
 
-macro_rules! primitive_cast_redispatch_impl(
-    ($t:ident, $tcast: ident) => (
-        impl<T: $tcast> Cast<T> for $t {
-            #[inline(always)]
-            fn from(t: T) -> $t {
-                $tcast::to(t)
-            }
-        }
-    )
-);
+primitive_cast_impl!(f64, f64);
+primitive_cast_impl!(f64, f32);
+primitive_cast_impl!(f64, i64);
+primitive_cast_impl!(f64, i32);
+primitive_cast_impl!(f64, i16);
+primitive_cast_impl!(f64, i8);
+primitive_cast_impl!(f64, u64);
+primitive_cast_impl!(f64, u32);
+primitive_cast_impl!(f64, u16);
+primitive_cast_impl!(f64, u8);
+primitive_cast_impl!(f64, isize);
+primitive_cast_impl!(f64, usize);
 
-primitive_double_dispatch_cast_decl_trait!(f64,  f64Cast);
-primitive_double_dispatch_cast_decl_trait!(f32,  f32Cast);
-primitive_double_dispatch_cast_decl_trait!(i64,  i64Cast);
-primitive_double_dispatch_cast_decl_trait!(i32,  i32Cast);
-primitive_double_dispatch_cast_decl_trait!(i16,  i16Cast);
-primitive_double_dispatch_cast_decl_trait!(i8,   i8Cast);
-primitive_double_dispatch_cast_decl_trait!(u64,  u64Cast);
-primitive_double_dispatch_cast_decl_trait!(u32,  u32Cast);
-primitive_double_dispatch_cast_decl_trait!(u16,  u16Cast);
-primitive_double_dispatch_cast_decl_trait!(u8,   u8Cast);
-primitive_double_dispatch_cast_decl_trait!(isize,  isizeCast);
-primitive_double_dispatch_cast_decl_trait!(usize, usizeCast);
+primitive_cast_impl!(f32, f64);
+primitive_cast_impl!(f32, f32);
+primitive_cast_impl!(f32, i64);
+primitive_cast_impl!(f32, i32);
+primitive_cast_impl!(f32, i16);
+primitive_cast_impl!(f32, i8);
+primitive_cast_impl!(f32, u64);
+primitive_cast_impl!(f32, u32);
+primitive_cast_impl!(f32, u16);
+primitive_cast_impl!(f32, u8);
+primitive_cast_impl!(f32, isize);
+primitive_cast_impl!(f32, usize);
 
-primitive_cast_redispatch_impl!(f64,  f64Cast);
-primitive_cast_redispatch_impl!(f32,  f32Cast);
-primitive_cast_redispatch_impl!(i64,  i64Cast);
-primitive_cast_redispatch_impl!(i32,  i32Cast);
-primitive_cast_redispatch_impl!(i16,  i16Cast);
-primitive_cast_redispatch_impl!(i8,   i8Cast);
-primitive_cast_redispatch_impl!(u64,  u64Cast);
-primitive_cast_redispatch_impl!(u32,  u32Cast);
-primitive_cast_redispatch_impl!(u16,  u16Cast);
-primitive_cast_redispatch_impl!(u8,   u8Cast);
-primitive_cast_redispatch_impl!(isize,  isizeCast);
-primitive_cast_redispatch_impl!(usize, usizeCast);
+primitive_cast_impl!(i64, f64);
+primitive_cast_impl!(i64, f32);
+primitive_cast_impl!(i64, i64);
+primitive_cast_impl!(i64, i32);
+primitive_cast_impl!(i64, i16);
+primitive_cast_impl!(i64, i8);
+primitive_cast_impl!(i64, u64);
+primitive_cast_impl!(i64, u32);
+primitive_cast_impl!(i64, u16);
+primitive_cast_impl!(i64, u8);
+primitive_cast_impl!(i64, isize);
+primitive_cast_impl!(i64, usize);
 
-primitive_double_dispatch_cast_impl!(f64, f64,  f64Cast);
-primitive_double_dispatch_cast_impl!(f64, f32,  f64Cast);
-primitive_double_dispatch_cast_impl!(f64, i64,  f64Cast);
-primitive_double_dispatch_cast_impl!(f64, i32,  f64Cast);
-primitive_double_dispatch_cast_impl!(f64, i16,  f64Cast);
-primitive_double_dispatch_cast_impl!(f64, i8,   f64Cast);
-primitive_double_dispatch_cast_impl!(f64, u64,  f64Cast);
-primitive_double_dispatch_cast_impl!(f64, u32,  f64Cast);
-primitive_double_dispatch_cast_impl!(f64, u16,  f64Cast);
-primitive_double_dispatch_cast_impl!(f64, u8,   f64Cast);
-primitive_double_dispatch_cast_impl!(f64, isize,  f64Cast);
-primitive_double_dispatch_cast_impl!(f64, usize, f64Cast);
+primitive_cast_impl!(i32, f64);
+primitive_cast_impl!(i32, f32);
+primitive_cast_impl!(i32, i64);
+primitive_cast_impl!(i32, i32);
+primitive_cast_impl!(i32, i16);
+primitive_cast_impl!(i32, i8);
+primitive_cast_impl!(i32, u64);
+primitive_cast_impl!(i32, u32);
+primitive_cast_impl!(i32, u16);
+primitive_cast_impl!(i32, u8);
+primitive_cast_impl!(i32, isize);
+primitive_cast_impl!(i32, usize);
 
-primitive_double_dispatch_cast_impl!(f32, f64,  f32Cast);
-primitive_double_dispatch_cast_impl!(f32, f32,  f32Cast);
-primitive_double_dispatch_cast_impl!(f32, i64,  f32Cast);
-primitive_double_dispatch_cast_impl!(f32, i32,  f32Cast);
-primitive_double_dispatch_cast_impl!(f32, i16,  f32Cast);
-primitive_double_dispatch_cast_impl!(f32, i8,   f32Cast);
-primitive_double_dispatch_cast_impl!(f32, u64,  f32Cast);
-primitive_double_dispatch_cast_impl!(f32, u32,  f32Cast);
-primitive_double_dispatch_cast_impl!(f32, u16,  f32Cast);
-primitive_double_dispatch_cast_impl!(f32, u8,   f32Cast);
-primitive_double_dispatch_cast_impl!(f32, isize,  f32Cast);
-primitive_double_dispatch_cast_impl!(f32, usize, f32Cast);
+primitive_cast_impl!(i16, f64);
+primitive_cast_impl!(i16, f32);
+primitive_cast_impl!(i16, i64);
+primitive_cast_impl!(i16, i32);
+primitive_cast_impl!(i16, i16);
+primitive_cast_impl!(i16, i8);
+primitive_cast_impl!(i16, u64);
+primitive_cast_impl!(i16, u32);
+primitive_cast_impl!(i16, u16);
+primitive_cast_impl!(i16, u8);
+primitive_cast_impl!(i16, isize);
+primitive_cast_impl!(i16, usize);
 
-primitive_double_dispatch_cast_impl!(i64, f64,  i64Cast);
-primitive_double_dispatch_cast_impl!(i64, f32,  i64Cast);
-primitive_double_dispatch_cast_impl!(i64, i64,  i64Cast);
-primitive_double_dispatch_cast_impl!(i64, i32,  i64Cast);
-primitive_double_dispatch_cast_impl!(i64, i16,  i64Cast);
-primitive_double_dispatch_cast_impl!(i64, i8,   i64Cast);
-primitive_double_dispatch_cast_impl!(i64, u64,  i64Cast);
-primitive_double_dispatch_cast_impl!(i64, u32,  i64Cast);
-primitive_double_dispatch_cast_impl!(i64, u16,  i64Cast);
-primitive_double_dispatch_cast_impl!(i64, u8,   i64Cast);
-primitive_double_dispatch_cast_impl!(i64, isize,  i64Cast);
-primitive_double_dispatch_cast_impl!(i64, usize, i64Cast);
+primitive_cast_impl!(i8, f64);
+primitive_cast_impl!(i8, f32);
+primitive_cast_impl!(i8, i64);
+primitive_cast_impl!(i8, i32);
+primitive_cast_impl!(i8, i16);
+primitive_cast_impl!(i8, i8);
+primitive_cast_impl!(i8, u64);
+primitive_cast_impl!(i8, u32);
+primitive_cast_impl!(i8, u16);
+primitive_cast_impl!(i8, u8);
+primitive_cast_impl!(i8, isize);
+primitive_cast_impl!(i8, usize);
 
-primitive_double_dispatch_cast_impl!(i32, f64,  i32Cast);
-primitive_double_dispatch_cast_impl!(i32, f32,  i32Cast);
-primitive_double_dispatch_cast_impl!(i32, i64,  i32Cast);
-primitive_double_dispatch_cast_impl!(i32, i32,  i32Cast);
-primitive_double_dispatch_cast_impl!(i32, i16,  i32Cast);
-primitive_double_dispatch_cast_impl!(i32, i8,   i32Cast);
-primitive_double_dispatch_cast_impl!(i32, u64,  i32Cast);
-primitive_double_dispatch_cast_impl!(i32, u32,  i32Cast);
-primitive_double_dispatch_cast_impl!(i32, u16,  i32Cast);
-primitive_double_dispatch_cast_impl!(i32, u8,   i32Cast);
-primitive_double_dispatch_cast_impl!(i32, isize,  i32Cast);
-primitive_double_dispatch_cast_impl!(i32, usize, i32Cast);
+primitive_cast_impl!(u64, f64);
+primitive_cast_impl!(u64, f32);
+primitive_cast_impl!(u64, i64);
+primitive_cast_impl!(u64, i32);
+primitive_cast_impl!(u64, i16);
+primitive_cast_impl!(u64, i8);
+primitive_cast_impl!(u64, u64);
+primitive_cast_impl!(u64, u32);
+primitive_cast_impl!(u64, u16);
+primitive_cast_impl!(u64, u8);
+primitive_cast_impl!(u64, isize);
+primitive_cast_impl!(u64, usize);
 
-primitive_double_dispatch_cast_impl!(i16, f64,  i16Cast);
-primitive_double_dispatch_cast_impl!(i16, f32,  i16Cast);
-primitive_double_dispatch_cast_impl!(i16, i64,  i16Cast);
-primitive_double_dispatch_cast_impl!(i16, i32,  i16Cast);
-primitive_double_dispatch_cast_impl!(i16, i16,  i16Cast);
-primitive_double_dispatch_cast_impl!(i16, i8,   i16Cast);
-primitive_double_dispatch_cast_impl!(i16, u64,  i16Cast);
-primitive_double_dispatch_cast_impl!(i16, u32,  i16Cast);
-primitive_double_dispatch_cast_impl!(i16, u16,  i16Cast);
-primitive_double_dispatch_cast_impl!(i16, u8,   i16Cast);
-primitive_double_dispatch_cast_impl!(i16, isize,  i16Cast);
-primitive_double_dispatch_cast_impl!(i16, usize, i16Cast);
+primitive_cast_impl!(u32, f64);
+primitive_cast_impl!(u32, f32);
+primitive_cast_impl!(u32, i64);
+primitive_cast_impl!(u32, i32);
+primitive_cast_impl!(u32, i16);
+primitive_cast_impl!(u32, i8);
+primitive_cast_impl!(u32, u64);
+primitive_cast_impl!(u32, u32);
+primitive_cast_impl!(u32, u16);
+primitive_cast_impl!(u32, u8);
+primitive_cast_impl!(u32, isize);
+primitive_cast_impl!(u32, usize);
 
-primitive_double_dispatch_cast_impl!(i8, f64,  i8Cast);
-primitive_double_dispatch_cast_impl!(i8, f32,  i8Cast);
-primitive_double_dispatch_cast_impl!(i8, i64,  i8Cast);
-primitive_double_dispatch_cast_impl!(i8, i32,  i8Cast);
-primitive_double_dispatch_cast_impl!(i8, i16,  i8Cast);
-primitive_double_dispatch_cast_impl!(i8, i8,   i8Cast);
-primitive_double_dispatch_cast_impl!(i8, u64,  i8Cast);
-primitive_double_dispatch_cast_impl!(i8, u32,  i8Cast);
-primitive_double_dispatch_cast_impl!(i8, u16,  i8Cast);
-primitive_double_dispatch_cast_impl!(i8, u8,   i8Cast);
-primitive_double_dispatch_cast_impl!(i8, isize,  i8Cast);
-primitive_double_dispatch_cast_impl!(i8, usize, i8Cast);
+primitive_cast_impl!(u16, f64);
+primitive_cast_impl!(u16, f32);
+primitive_cast_impl!(u16, i64);
+primitive_cast_impl!(u16, i32);
+primitive_cast_impl!(u16, i16);
+primitive_cast_impl!(u16, i8);
+primitive_cast_impl!(u16, u64);
+primitive_cast_impl!(u16, u32);
+primitive_cast_impl!(u16, u16);
+primitive_cast_impl!(u16, u8);
+primitive_cast_impl!(u16, isize);
+primitive_cast_impl!(u16, usize);
 
-primitive_double_dispatch_cast_impl!(u64, f64,  u64Cast);
-primitive_double_dispatch_cast_impl!(u64, f32,  u64Cast);
-primitive_double_dispatch_cast_impl!(u64, i64,  u64Cast);
-primitive_double_dispatch_cast_impl!(u64, i32,  u64Cast);
-primitive_double_dispatch_cast_impl!(u64, i16,  u64Cast);
-primitive_double_dispatch_cast_impl!(u64, i8,   u64Cast);
-primitive_double_dispatch_cast_impl!(u64, u64,  u64Cast);
-primitive_double_dispatch_cast_impl!(u64, u32,  u64Cast);
-primitive_double_dispatch_cast_impl!(u64, u16,  u64Cast);
-primitive_double_dispatch_cast_impl!(u64, u8,   u64Cast);
-primitive_double_dispatch_cast_impl!(u64, isize,  u64Cast);
-primitive_double_dispatch_cast_impl!(u64, usize, u64Cast);
+primitive_cast_impl!(u8, f64);
+primitive_cast_impl!(u8, f32);
+primitive_cast_impl!(u8, i64);
+primitive_cast_impl!(u8, i32);
+primitive_cast_impl!(u8, i16);
+primitive_cast_impl!(u8, i8);
+primitive_cast_impl!(u8, u64);
+primitive_cast_impl!(u8, u32);
+primitive_cast_impl!(u8, u16);
+primitive_cast_impl!(u8, u8);
+primitive_cast_impl!(u8, isize);
+primitive_cast_impl!(u8, usize);
 
-primitive_double_dispatch_cast_impl!(u32, f64,  u32Cast);
-primitive_double_dispatch_cast_impl!(u32, f32,  u32Cast);
-primitive_double_dispatch_cast_impl!(u32, i64,  u32Cast);
-primitive_double_dispatch_cast_impl!(u32, i32,  u32Cast);
-primitive_double_dispatch_cast_impl!(u32, i16,  u32Cast);
-primitive_double_dispatch_cast_impl!(u32, i8,   u32Cast);
-primitive_double_dispatch_cast_impl!(u32, u64,  u32Cast);
-primitive_double_dispatch_cast_impl!(u32, u32,  u32Cast);
-primitive_double_dispatch_cast_impl!(u32, u16,  u32Cast);
-primitive_double_dispatch_cast_impl!(u32, u8,   u32Cast);
-primitive_double_dispatch_cast_impl!(u32, isize,  u32Cast);
-primitive_double_dispatch_cast_impl!(u32, usize, u32Cast);
+primitive_cast_impl!(usize, f64);
+primitive_cast_impl!(usize, f32);
+primitive_cast_impl!(usize, i64);
+primitive_cast_impl!(usize, i32);
+primitive_cast_impl!(usize, i16);
+primitive_cast_impl!(usize, i8);
+primitive_cast_impl!(usize, u64);
+primitive_cast_impl!(usize, u32);
+primitive_cast_impl!(usize, u16);
+primitive_cast_impl!(usize, u8);
+primitive_cast_impl!(usize, isize);
+primitive_cast_impl!(usize, usize);
 
-primitive_double_dispatch_cast_impl!(u16, f64,  u16Cast);
-primitive_double_dispatch_cast_impl!(u16, f32,  u16Cast);
-primitive_double_dispatch_cast_impl!(u16, i64,  u16Cast);
-primitive_double_dispatch_cast_impl!(u16, i32,  u16Cast);
-primitive_double_dispatch_cast_impl!(u16, i16,  u16Cast);
-primitive_double_dispatch_cast_impl!(u16, i8,   u16Cast);
-primitive_double_dispatch_cast_impl!(u16, u64,  u16Cast);
-primitive_double_dispatch_cast_impl!(u16, u32,  u16Cast);
-primitive_double_dispatch_cast_impl!(u16, u16,  u16Cast);
-primitive_double_dispatch_cast_impl!(u16, u8,   u16Cast);
-primitive_double_dispatch_cast_impl!(u16, isize,  u16Cast);
-primitive_double_dispatch_cast_impl!(u16, usize, u16Cast);
-
-primitive_double_dispatch_cast_impl!(u8, f64,  u8Cast);
-primitive_double_dispatch_cast_impl!(u8, f32,  u8Cast);
-primitive_double_dispatch_cast_impl!(u8, i64,  u8Cast);
-primitive_double_dispatch_cast_impl!(u8, i32,  u8Cast);
-primitive_double_dispatch_cast_impl!(u8, i16,  u8Cast);
-primitive_double_dispatch_cast_impl!(u8, i8,   u8Cast);
-primitive_double_dispatch_cast_impl!(u8, u64,  u8Cast);
-primitive_double_dispatch_cast_impl!(u8, u32,  u8Cast);
-primitive_double_dispatch_cast_impl!(u8, u16,  u8Cast);
-primitive_double_dispatch_cast_impl!(u8, u8,   u8Cast);
-primitive_double_dispatch_cast_impl!(u8, isize,  u8Cast);
-primitive_double_dispatch_cast_impl!(u8, usize, u8Cast);
-
-primitive_double_dispatch_cast_impl!(usize, f64,  usizeCast);
-primitive_double_dispatch_cast_impl!(usize, f32,  usizeCast);
-primitive_double_dispatch_cast_impl!(usize, i64,  usizeCast);
-primitive_double_dispatch_cast_impl!(usize, i32,  usizeCast);
-primitive_double_dispatch_cast_impl!(usize, i16,  usizeCast);
-primitive_double_dispatch_cast_impl!(usize, i8,   usizeCast);
-primitive_double_dispatch_cast_impl!(usize, u64,  usizeCast);
-primitive_double_dispatch_cast_impl!(usize, u32,  usizeCast);
-primitive_double_dispatch_cast_impl!(usize, u16,  usizeCast);
-primitive_double_dispatch_cast_impl!(usize, u8,   usizeCast);
-primitive_double_dispatch_cast_impl!(usize, isize,  usizeCast);
-primitive_double_dispatch_cast_impl!(usize, usize, usizeCast);
-
-primitive_double_dispatch_cast_impl!(isize, f64,  isizeCast);
-primitive_double_dispatch_cast_impl!(isize, f32,  isizeCast);
-primitive_double_dispatch_cast_impl!(isize, i64,  isizeCast);
-primitive_double_dispatch_cast_impl!(isize, i32,  isizeCast);
-primitive_double_dispatch_cast_impl!(isize, i16,  isizeCast);
-primitive_double_dispatch_cast_impl!(isize, i8,   isizeCast);
-primitive_double_dispatch_cast_impl!(isize, u64,  isizeCast);
-primitive_double_dispatch_cast_impl!(isize, u32,  isizeCast);
-primitive_double_dispatch_cast_impl!(isize, u16,  isizeCast);
-primitive_double_dispatch_cast_impl!(isize, u8,   isizeCast);
-primitive_double_dispatch_cast_impl!(isize, isize,  isizeCast);
-primitive_double_dispatch_cast_impl!(isize, usize, isizeCast);
+primitive_cast_impl!(isize, f64);
+primitive_cast_impl!(isize, f32);
+primitive_cast_impl!(isize, i64);
+primitive_cast_impl!(isize, i32);
+primitive_cast_impl!(isize, i16);
+primitive_cast_impl!(isize, i8);
+primitive_cast_impl!(isize, u64);
+primitive_cast_impl!(isize, u32);
+primitive_cast_impl!(isize, u16);
+primitive_cast_impl!(isize, u8);
+primitive_cast_impl!(isize, isize);
+primitive_cast_impl!(isize, usize);