Remove ser::Iterator

serde/src/ser/impls.rs

@@ -66,9 +66,6 @@ use super::{
 #[cfg(any(feature = "std", feature = "unstable"))]
 use super::Error;
 
-#[cfg(feature = "unstable")]
-use super::Iterator;
-
 ///////////////////////////////////////////////////////////////////////////////
 
 macro_rules! impl_visit {
@@ -220,33 +217,6 @@ array_impls!(32);
 
 ///////////////////////////////////////////////////////////////////////////////
 
-#[cfg(feature = "unstable")]
-impl<'a, I> Serialize for Iterator<I>
-    where I: IntoIterator, <I as IntoIterator>::Item: Serialize
-{
-    #[inline]
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-        where S: Serializer,
-    {
-        // FIXME: use specialization to prevent invalidating the object in case of clonable iterators?
-        let iter = match self.data.borrow_mut().take() {
-            Some(iter) => iter.into_iter(),
-            None => return Err(Error::custom("Iterator used twice")),
-        };
-        let size = match iter.size_hint() {
-            (lo, Some(hi)) if lo == hi => Some(lo),
-            _ => None,
-        };
-        let mut seq = try!(serializer.serialize_seq(size));
-        for e in iter {
-            try!(seq.serialize_element(&e));
-        }
-        seq.end()
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
 macro_rules! serialize_seq {
     () => {
         #[inline]

serde/src/ser/mod.rs

@@ -98,9 +98,6 @@ use std::error;
 #[cfg(not(feature = "std"))]
 use error;
 
-#[cfg(feature = "unstable")]
-use core::cell::RefCell;
-
 use core::fmt::Display;
 use core::iter::IntoIterator;
 
@@ -839,30 +836,6 @@ pub trait SerializeStructVariant {
     fn end(self) -> Result<Self::Ok, Self::Error>;
 }
 
-/// A wrapper type for iterators that implements `Serialize` for iterators whose
-/// items implement `Serialize`. Don't use multiple times. Create new versions
-/// of this with the `serde::ser::iterator` function every time you want to
-/// serialize an iterator.
-#[cfg(feature = "unstable")]
-pub struct Iterator<I>
-    where <I as IntoIterator>::Item: Serialize,
-          I: IntoIterator
-{
-    data: RefCell<Option<I>>,
-}
-
-/// Create a wrapper type that can be passed to any function expecting a
-/// `Serialize` and will serialize the given iterator as a sequence.
-#[cfg(feature = "unstable")]
-pub fn iterator<I>(iter: I) -> Iterator<I>
-    where <I as IntoIterator>::Item: Serialize,
-          I: IntoIterator
-{
-    Iterator {
-        data: RefCell::new(Some(iter)),
-    }
-}
-
 fn iterator_len_hint<I: Iterator>(iter: &I) -> Option<usize> {
     match iter.size_hint() {
         (lo, Some(hi)) if lo == hi => Some(lo),