diff --git a/src/funs/boolv.rs b/src/funs/boolv.rs
index 39b18fc..5f416eb 100644
--- a/src/funs/boolv.rs
+++ b/src/funs/boolv.rs
@@ -1,53 +1,53 @@
 use vector::{Vec2, Vec3, Vec4};
 
 pub trait BooleanVector {
-    pub fn any() -> bool;
-    pub fn all() -> bool;
-    pub fn not() -> self;
+    pure fn any() -> bool;
+    pure fn all() -> bool;
+    pure fn not() -> self;
 }
 
-#[inline(always)] pub fn any<T:BooleanVector>(x: &T) -> bool { x.any() }
-#[inline(always)] pub fn all<T:BooleanVector>(x: &T) -> bool { x.all() }
-#[inline(always)] pub fn not<T:BooleanVector>(x: &T) -> T    { x.not() }
+#[inline(always)] pub pure fn any<T:BooleanVector>(x: &T) -> bool { x.any() }
+#[inline(always)] pub pure fn all<T:BooleanVector>(x: &T) -> bool { x.all() }
+#[inline(always)] pub pure fn not<T:BooleanVector>(x: &T) -> T    { x.not() }
 
 pub impl Vec2<bool>: BooleanVector {
-    pub fn any() -> bool {
+    pure fn any() -> bool {
         self[0] || self[1]
     }
     
-    pub fn all() -> bool {
+    pure fn all() -> bool {
         self[0] && self[1]
     }
     
-    pub fn not() -> Vec2<bool> { 
+    pure fn not() -> Vec2<bool> { 
         Vec2::new(!self[0], !self[1])
     }
 }
 
 pub impl Vec3<bool>: BooleanVector {
-    pub fn any() -> bool {
+    pure fn any() -> bool {
         self[0] || self[1] || self[2]
     }
     
-    pub fn all() -> bool {
+    pure fn all() -> bool {
         self[0] && self[1] && self[2]
     }
     
-    pub fn not() -> Vec3<bool> { 
+    pure fn not() -> Vec3<bool> { 
         Vec3::new(!self[0], !self[1], !self[2])
     }
 }
 
 pub impl Vec4<bool>: BooleanVector {
-    pub fn any() -> bool {
+    pure fn any() -> bool {
         self[0] || self[1] || self[2] || self[3]
     }
     
-    pub fn all() -> bool {
+    pure fn all() -> bool {
         self[0] && self[1] && self[2] && self[3]
     }
     
-    pub fn not() -> Vec4<bool> { 
+    pure fn not() -> Vec4<bool> { 
         Vec4::new(!self[0], !self[1], !self[2], !self[3])
     }
 }
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