diff --git a/src/lib.rs b/src/lib.rs
index a7373772..f4d1340a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -83,7 +83,6 @@ Feel free to add your project to this list if you happen to use **nalgebra**!
 #![deny(unused_results)]
 #![warn(missing_docs)]
 #![feature(unboxed_closures)]
-#![feature(hash)]
 #![feature(core)]
 #![feature(std_misc)]
 #![doc(html_root_url = "http://nalgebra.org/doc")]
diff --git a/src/structs/dvec.rs b/src/structs/dvec.rs
index 58d7703f..8f9dcb9b 100644
--- a/src/structs/dvec.rs
+++ b/src/structs/dvec.rs
@@ -3,7 +3,7 @@
 #![allow(missing_docs)] // we hide doc to not have to document the $trhs double dispatch trait.
 
 use std::slice::{Iter, IterMut};
-use std::iter::FromIterator;
+use std::iter::{FromIterator, IntoIterator};
 use std::iter::repeat;
 use std::ops::{Add, Sub, Mul, Div, Neg, Index, IndexMut};
 use rand::{self, Rand};
@@ -68,8 +68,8 @@ impl<N> DVec<N> {
 
 impl<N> FromIterator<N> for DVec<N> {
     #[inline]
-    fn from_iter<I: Iterator<Item = N>>(param: I) -> DVec<N> {
-        DVec { at: param.collect() }
+    fn from_iter<I: IntoIterator<Item = N>>(param: I) -> DVec<N> {
+        DVec { at: param.into_iter().collect() }
     }
 }
 
diff --git a/src/structs/dvec_macros.rs b/src/structs/dvec_macros.rs
index 056a4640..1dfda926 100644
--- a/src/structs/dvec_macros.rs
+++ b/src/structs/dvec_macros.rs
@@ -497,12 +497,12 @@ macro_rules! small_dvec_from_impl (
 
         impl<N: Zero> FromIterator<N> for $dvec<N> {
             #[inline]
-            fn from_iter<I: Iterator<Item = N>>(param: I) -> $dvec<N> {
+            fn from_iter<I: IntoIterator<Item = N>>(param: I) -> $dvec<N> {
                 let mut at: [N; $dim] = [ $( $zeros, )* ];
 
                 let mut dim = 0;
 
-                for n in param {
+                for n in param.into_iter() {
                     if dim == $dim {
                         break;
                     }
diff --git a/src/structs/pnt.rs b/src/structs/pnt.rs
index 3bcf273f..4dfde695 100644
--- a/src/structs/pnt.rs
+++ b/src/structs/pnt.rs
@@ -2,9 +2,10 @@
 
 #![allow(missing_docs)] // we allow missing to avoid having to document the point components.
 
+use std::marker::PhantomData;
 use std::mem;
 use std::slice::{Iter, IterMut};
-use std::iter::{Iterator, FromIterator};
+use std::iter::{Iterator, FromIterator, IntoIterator};
 use std::ops::{Add, Sub, Mul, Div, Neg, Index, IndexMut};
 use rand::{Rand, Rng};
 use traits::operations::{ApproxEq, POrd, POrdering, Axpy, ScalarAdd, ScalarSub, ScalarMul,
@@ -18,20 +19,20 @@ use quickcheck::{Arbitrary, Gen};
 
 
 /// Point of dimension 0.
-#[derive(Eq, PartialEq, RustcDecodable, Clone, Debug, Copy)]
-pub struct Pnt0<N>;
+#[derive(Eq, PartialEq, Clone, Debug, Copy)]
+pub struct Pnt0<N>(pub PhantomData<N>);
 
 impl<N> Pnt0<N> {
     /// Creates a new point.
     #[inline]
     pub fn new() -> Pnt0<N> {
-        Pnt0
+        Pnt0(PhantomData)
     }
 
     /// Creates a new point. The parameter is not taken in account.
     #[inline]
     pub fn new_repeat(_: N) -> Pnt0<N> {
-        Pnt0
+        Pnt0(PhantomData)
     }
 }
 
diff --git a/src/structs/quat.rs b/src/structs/quat.rs
index 057eee1c..98afa714 100644
--- a/src/structs/quat.rs
+++ b/src/structs/quat.rs
@@ -6,7 +6,7 @@ use std::mem;
 use std::num;
 use std::slice::{Iter, IterMut};
 use std::ops::{Add, Sub, Mul, Div, Neg, Index, IndexMut};
-use std::iter::FromIterator;
+use std::iter::{FromIterator, IntoIterator};
 use rand::{Rand, Rng};
 use structs::{Vec3, Pnt3, Rot3, Mat3};
 use traits::operations::{ApproxEq, Inv, POrd, POrdering, Axpy, ScalarAdd, ScalarSub, ScalarMul,
diff --git a/src/structs/spec/vec0.rs b/src/structs/spec/vec0.rs
index 87761f35..7a0602a5 100644
--- a/src/structs/spec/vec0.rs
+++ b/src/structs/spec/vec0.rs
@@ -1,7 +1,8 @@
 use std::ops::{Add, Sub, Mul, Div, Neg, Index, IndexMut};
+use std::marker::PhantomData;
 use std::mem;
 use std::slice::{Iter, IterMut};
-use std::iter::{Iterator, FromIterator};
+use std::iter::{FromIterator, IntoIterator};
 use rand::{Rand, Rng};
 use traits::operations::ApproxEq;
 use traits::structure::{Iterable, IterableMut, Indexable, Basis, Dim, Shape, BaseFloat, BaseNum,
@@ -12,7 +13,7 @@ use structs::vec;
 impl<N> Zero for vec::Vec0<N> {
     #[inline]
     fn zero() -> vec::Vec0<N> {
-        vec::Vec0
+        vec::Vec0(PhantomData)
     }
 
     #[inline]
@@ -107,7 +108,7 @@ impl<N, T> Add<T> for vec::Vec0<N> {
 
     #[inline]
     fn add(self, _: T) -> vec::Vec0<N> {
-        vec::Vec0
+        vec::Vec0(PhantomData)
     }
 }
 
@@ -116,7 +117,7 @@ impl<N, T> Sub<T> for vec::Vec0<N> {
 
     #[inline]
     fn sub(self, _: T) -> vec::Vec0<N> {
-        vec::Vec0
+        vec::Vec0(PhantomData)
     }
 }
 
@@ -125,7 +126,7 @@ impl<N: Neg<Output = N> + Copy> Neg for vec::Vec0<N> {
 
     #[inline]
     fn neg(self) -> vec::Vec0<N> {
-        vec::Vec0
+        vec::Vec0(PhantomData)
     }
 }
 
@@ -141,7 +142,7 @@ impl<N, T> Mul<T> for vec::Vec0<N> {
 
     #[inline]
     fn mul(self, _: T) -> vec::Vec0<N> {
-        vec::Vec0
+        vec::Vec0(PhantomData)
     }
 }
 
@@ -150,7 +151,7 @@ impl<N, T> Div<T> for vec::Vec0<N> {
 
     #[inline]
     fn div(self, _: T) -> vec::Vec0<N> {
-        vec::Vec0
+        vec::Vec0(PhantomData)
     }
 }
 
@@ -236,30 +237,30 @@ impl<N: ApproxEq<N>> ApproxEq<N> for vec::Vec0<N> {
 impl<N: One> One for vec::Vec0<N> {
     #[inline]
     fn one() -> vec::Vec0<N> {
-        vec::Vec0
+        vec::Vec0(PhantomData)
     }
 }
 
 impl<N> FromIterator<N> for vec::Vec0<N> {
     #[inline]
-    fn from_iter<I: Iterator<Item = N>>(_: I) -> vec::Vec0<N> {
-        vec::Vec0
+    fn from_iter<I: IntoIterator<Item = N>>(_: I) -> vec::Vec0<N> {
+        vec::Vec0(PhantomData)
     }
 }
 
 impl<N: Bounded> Bounded for vec::Vec0<N> {
     #[inline]
     fn max_value() -> vec::Vec0<N> {
-        vec::Vec0
+        vec::Vec0(PhantomData)
     }
 
     #[inline]
     fn min_value() -> vec::Vec0<N> {
-        vec::Vec0
+        vec::Vec0(PhantomData)
     }
 }
 
 impl<N> Rand for vec::Vec0<N> {
     #[inline]
-    fn rand<R: Rng>(_: &mut R) -> vec::Vec0<N> { vec::Vec0 }
+    fn rand<R: Rng>(_: &mut R) -> vec::Vec0<N> { vec::Vec0(PhantomData) }
 }
diff --git a/src/structs/vec.rs b/src/structs/vec.rs
index bc8afff8..f8a52c00 100644
--- a/src/structs/vec.rs
+++ b/src/structs/vec.rs
@@ -3,9 +3,10 @@
 #![allow(missing_docs)] // we allow missing to avoid having to document the dispatch traits.
 
 use std::ops::{Add, Sub, Mul, Div, Neg, Index, IndexMut};
+use std::marker::PhantomData;
 use std::mem;
 use std::slice::{Iter, IterMut};
-use std::iter::{Iterator, FromIterator};
+use std::iter::{Iterator, FromIterator, IntoIterator};
 use rand::{Rand, Rng};
 use traits::operations::{ApproxEq, POrd, POrdering, Axpy, ScalarAdd, ScalarSub, ScalarMul,
                          ScalarDiv, Absolute};
@@ -20,20 +21,20 @@ use quickcheck::{Arbitrary, Gen};
 
 
 /// Vector of dimension 0.
-#[derive(Eq, PartialEq, RustcDecodable, Clone, Debug, Copy)]
-pub struct Vec0<N>;
+#[derive(Eq, PartialEq, Clone, Debug, Copy)]
+pub struct Vec0<N>(pub PhantomData<N>);
 
 impl<N> Vec0<N> {
     /// Creates a new vector.
     #[inline]
     pub fn new() -> Vec0<N> {
-        Vec0
+        Vec0(PhantomData)
     }
 
     /// Creates a new vector. The parameter is not taken in account.
     #[inline]
     pub fn new_repeat(_: N) -> Vec0<N> {
-        Vec0
+        Vec0(PhantomData)
     }
 }
 
diff --git a/src/structs/vec_macros.rs b/src/structs/vec_macros.rs
index 4dac962c..ade4eac3 100644
--- a/src/structs/vec_macros.rs
+++ b/src/structs/vec_macros.rs
@@ -680,7 +680,8 @@ macro_rules! from_iterator_impl(
     ($t: ident, $param0: ident) => (
         impl<N> FromIterator<N> for $t<N> {
             #[inline]
-            fn from_iter<I: Iterator<Item = N>>(mut $param0: I) -> $t<N> {
+            fn from_iter<I: IntoIterator<Item = N>>($param0: I) -> $t<N> {
+                let mut $param0 = $param0.into_iter();
                 $t::new($param0.next().unwrap())
             }
         }
@@ -688,7 +689,8 @@ macro_rules! from_iterator_impl(
     ($t: ident, $param0: ident, $($paramN: ident),+) => (
         impl<N> FromIterator<N> for $t<N> {
             #[inline]
-            fn from_iter<I: Iterator<Item = N>>(mut $param0: I) -> $t<N> {
+            fn from_iter<I: IntoIterator<Item = N>>($param0: I) -> $t<N> {
+                let mut $param0 = $param0.into_iter();
                 $t::new($param0.next().unwrap(),
                         $($paramN.next().unwrap()),+)
             }