Remove WorldSerializer in favor of a serialize method on World.

.travis.yml

@@ -1,6 +1,6 @@
 language: rust
 rust:
-- nightly-2017-06-19
+- nightly-2017-06-20
 - beta
 - stable
 

src/lib.rs

@@ -208,7 +208,7 @@ pub use storage::{MergeError, PackedData};
 pub mod common;
 
 #[cfg(feature="serialize")]
-pub use world::{WorldSerializer, WorldDeserializer};
+pub use world::WorldDeserializer;
 
 /// A wrapper for a fetched `Entities` resource.
 /// Note that this is just `Fetch<Entities>`, so

src/world.rs

@@ -750,6 +750,15 @@ impl World {
             }
         }
     }
+
+    #[cfg(feature = "serialize")]
+    /// Serializes the component in the world using the group as a "filter".
+    pub fn serialize<G, S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+        where G: SerializeGroup,
+              S: Serializer,     
+    {
+        G::serialize_group(self, serializer)
+    }
 }
 
 impl Default for World {
@@ -795,44 +804,15 @@ mod tests {
     }
 }
 
-#[cfg(feature="serialize")]
-/// Structure used to serialize a world using a component group.
-pub struct WorldSerializer<'a, G> {
-    world: &'a World,
-    phantom: PhantomData<G>,
-}
-
-#[cfg(feature="serialize")]
-impl<'a, G> WorldSerializer<'a, G> {
-    /// Creates a new world serializer out of a world.
-    pub fn new(world: &'a World) -> WorldSerializer<'a, G> {
-        WorldSerializer {
-            world: world,
-            phantom: PhantomData,
-        }
-    }
-}
-
-#[cfg(feature="serialize")]
-impl<'a, G> Serialize for WorldSerializer<'a, G>
-    where G: ComponentGroup + SerializeGroup
-{
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-        where S: Serializer 
-    {
-        G::serialize_group(self.world, serializer)
-    }
-}
-
-#[cfg(feature="serialize")]
+#[cfg(feature = "serialize")]
 /// Structure used for stateful deserialization into the world using a component group.
 pub struct WorldDeserializer<'a, G> {
     world: &'a mut World,
     entities: &'a [Entity],
     phantom: PhantomData<G>,
 }
 
-#[cfg(feature="serialize")]
+#[cfg(feature = "serialize")]
 impl<'a, G> WorldDeserializer<'a, G> {
     /// Creates a new world deserializer out of a world and a list of entities.
     ///