undo the breaking change introduced in 0.7.6

serde/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "serde"
-version = "0.7.6"
+version = "0.7.7"
 authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
 license = "MIT/Apache-2.0"
 description = "A generic serialization/deserialization framework"

serde/src/de/mod.rs

@@ -578,7 +578,7 @@ pub trait Visitor {
     fn visit_char<E>(&mut self, v: char) -> Result<Self::Value, E>
         where E: Error,
     {
-        self.visit_str(::core::str::from_utf8(::utils::encode_utf8(v).as_slice()).unwrap())
+        self.visit_str(::utils::encode_utf8(v).as_str())
     }
 
     /// `visit_str` deserializes a `&str` into a `Value`.

serde/src/ser/mod.rs

@@ -122,11 +122,11 @@ pub trait Serializer {
     /// Serializes a `f64` value.
     fn serialize_f64(&mut self, v: f64) -> Result<(), Self::Error>;
 
-    /// Serializes a character. By default it serializes as bytes containing the UTF-8 encoding
-    /// of the character.
+    /// Serializes a character. By default it serializes it as a `&str` containing a
+    /// single character.
     #[inline]
     fn serialize_char(&mut self, v: char) -> Result<(), Self::Error> {
-        self.serialize_bytes(::utils::encode_utf8(v).as_slice())
+        self.serialize_str(::utils::encode_utf8(v).as_str())
     }
 
     /// Serializes a `&str`.

serde/src/utils.rs

@@ -40,9 +40,9 @@ pub struct EncodeUtf8 {
 }
 
 impl EncodeUtf8 {
-    /// Returns the remaining bytes of this iterator as a slice.
-    pub fn as_slice(&self) -> &[u8] {
-        &self.buf[self.pos..]
+    // FIXME: use this from_utf8_unchecked, since we know it can never fail
+    pub fn as_str(&self) -> &str {
+        ::core::str::from_utf8(&self.buf[self.pos..]).unwrap()
     }
 }