buffered-reader: Require that BufferedReaders implement Display.

  - Also, update BufferedReaders to implement it.

11 files changed, 83 insertions, 4 deletions

diff --git a/buffered-reader/src/decompress_bzip2.rs b/buffered-reader/src/decompress_bzip2.rs
index f118fa6a..4224f686 100644
--- a/buffered-reader/src/decompress_bzip2.rs
+++ b/buffered-reader/src/decompress_bzip2.rs
@@ -40,7 +40,7 @@ impl<R: BufferedReader<C>, C> io::Read for BufferedReaderBzip<R, C> {
     }
 }
 
-impl <R: BufferedReader<C>, C> fmt::Debug for BufferedReaderBzip<R, C> {
+impl<R: BufferedReader<C>, C> fmt::Debug for BufferedReaderBzip<R, C> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_struct("BufferedReaderBzip")
             .field("reader", &self.get_ref().unwrap())
@@ -48,6 +48,12 @@ impl <R: BufferedReader<C>, C> fmt::Debug for BufferedReaderBzip<R, C> {
     }
 }
 
+impl<R: BufferedReader<C>, C> fmt::Display for BufferedReaderBzip<R, C> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "BufferedReaderBzip")
+    }
+}
+
 impl<R: BufferedReader<C>, C> BufferedReader<C> for BufferedReaderBzip<R, C> {
     fn buffer(&self) -> &[u8] {
         return self.reader.buffer();
diff --git a/buffered-reader/src/decompress_deflate.rs b/buffered-reader/src/decompress_deflate.rs
index 3f3da76c..42633419 100644
--- a/buffered-reader/src/decompress_deflate.rs
+++ b/buffered-reader/src/decompress_deflate.rs
@@ -40,7 +40,13 @@ impl<R: BufferedReader<C>, C> io::Read for BufferedReaderDeflate<R, C> {
     }
 }
 
-impl <R: BufferedReader<C>, C> fmt::Debug for BufferedReaderDeflate<R, C> {
+impl<R: BufferedReader<C>, C> fmt::Display for BufferedReaderDeflate<R, C> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "BufferedReaderDeflate")
+    }
+}
+
+impl<R: BufferedReader<C>, C> fmt::Debug for BufferedReaderDeflate<R, C> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_struct("BufferedReaderDeflate")
             .field("reader", &self.get_ref().unwrap())
@@ -156,7 +162,13 @@ impl<R: BufferedReader<C>, C> io::Read for BufferedReaderZlib<R, C> {
     }
 }
 
-impl <R: BufferedReader<C>, C> fmt::Debug for BufferedReaderZlib<R, C> {
+impl<R: BufferedReader<C>, C> fmt::Display for BufferedReaderZlib<R, C> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "BufferedReaderZlib")
+    }
+}
+
+impl<R: BufferedReader<C>, C> fmt::Debug for BufferedReaderZlib<R, C> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_struct("BufferedReaderZlib")
             .field("reader", &self.get_ref().unwrap())
diff --git a/buffered-reader/src/dup.rs b/buffered-reader/src/dup.rs
index 4dd8c347..123e13d6 100644
--- a/buffered-reader/src/dup.rs
+++ b/buffered-reader/src/dup.rs
@@ -20,6 +20,13 @@ pub struct BufferedReaderDup<'a, C> {
     cookie: C,
 }
 
+impl<'a, C> fmt::Display for BufferedReaderDup<'a, C> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "BufferedReaderDup ({} bytes consumed)",
+               self.cursor)
+    }
+}
+
 impl<'a, C> fmt::Debug for BufferedReaderDup<'a, C> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_struct("BufferedReaderDup")
diff --git a/buffered-reader/src/eof.rs b/buffered-reader/src/eof.rs
index cadc035a..424e2245 100644
--- a/buffered-reader/src/eof.rs
+++ b/buffered-reader/src/eof.rs
@@ -9,6 +9,12 @@ pub struct BufferedReaderEOF<C> {
     cookie: C,
 }
 
+impl<C> fmt::Display for BufferedReaderEOF<C> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "BufferedReaderEOF")
+    }
+}
+
 impl<C> fmt::Debug for BufferedReaderEOF<C> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_struct("BufferedReaderEOF")
diff --git a/buffered-reader/src/file_generic.rs b/buffered-reader/src/file_generic.rs
index 45844a78..c0cc489d 100644
--- a/buffered-reader/src/file_generic.rs
+++ b/buffered-reader/src/file_generic.rs
@@ -11,6 +11,12 @@ use super::*;
 /// platform-specific versions.
 pub struct BufferedReaderFile<C>(BufferedReaderGeneric<File, C>);
 
+impl<C> fmt::Display for BufferedReaderFile<C> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "BufferedReaderFile")
+    }
+}
+
 impl<C> fmt::Debug for BufferedReaderFile<C> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_tuple("BufferedReaderFile")
diff --git a/buffered-reader/src/file_unix.rs b/buffered-reader/src/file_unix.rs
index 9dc80ce1..bb6f2673 100644
--- a/buffered-reader/src/file_unix.rs
+++ b/buffered-reader/src/file_unix.rs
@@ -26,6 +26,12 @@ const MMAP_THRESHOLD: u64 = 16 * 4096;
 /// just using a generic reader.
 pub struct BufferedReaderFile<'a, C>(Imp<'a, C>);
 
+impl<'a, C> fmt::Display for BufferedReaderFile<'a, C> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}
+
 impl<'a, C> fmt::Debug for BufferedReaderFile<'a, C> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_tuple("BufferedReaderFile")
@@ -56,6 +62,17 @@ impl<'a, C> Drop for Imp<'a, C> {
     }
 }
 
+impl<'a, C> fmt::Display for Imp<'a, C> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "BufferedReaderFile(")?;
+        match self {
+            Imp::Generic(_) => write!(f, "BufferedReaderGeneric")?,
+            Imp::MMAP { .. } => write!(f, "BufferedReaderMemory")?,
+        };
+        write!(f, ")")
+    }
+}
+
 impl<'a, C> fmt::Debug for Imp<'a, C> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         match self {
diff --git a/buffered-reader/src/generic.rs b/buffered-reader/src/generic.rs
index a2a5321b..882c64e9 100644
--- a/buffered-reader/src/generic.rs
+++ b/buffered-reader/src/generic.rs
@@ -27,6 +27,12 @@ pub struct BufferedReaderGeneric<T: io::Read, C> {
     cookie: C,
 }
 
+impl<T: io::Read, C> fmt::Display for BufferedReaderGeneric<T, C> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "BufferedReaderGeneric")
+    }
+}
+
 impl<T: io::Read, C> fmt::Debug for BufferedReaderGeneric<T, C> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         let buffered_data = if let Some(ref buffer) = self.buffer {
diff --git a/buffered-reader/src/lib.rs b/buffered-reader/src/lib.rs
index d8f9eadc..f56e188c 100644
--- a/buffered-reader/src/lib.rs
+++ b/buffered-reader/src/lib.rs
@@ -276,7 +276,7 @@ pub use self::file_unix::BufferedReaderFile;
 const DEFAULT_BUF_SIZE: usize = 8 * 1024;
 
 /// The generic `BufferReader` interface.
-pub trait BufferedReader<C> : io::Read + fmt::Debug {
+pub trait BufferedReader<C> : io::Read + fmt::Debug + fmt::Display {
     /// Returns a reference to the internal buffer.
     ///
     /// Note: this returns the same data as `self.data(0)`, but it
diff --git a/buffered-reader/src/limitor.rs b/buffered-reader/src/limitor.rs
index a132aefe..e53ca202 100644
--- a/buffered-reader/src/limitor.rs
+++ b/buffered-reader/src/limitor.rs
@@ -12,6 +12,12 @@ pub struct BufferedReaderLimitor<'a, C> {
     cookie: C,
 }
 
+impl<'a, C> fmt::Display for BufferedReaderLimitor<'a, C> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "BufferedReaderLimitor ({} bytes)", self.limit)
+    }
+}
+
 impl<'a, C> fmt::Debug for BufferedReaderLimitor<'a, C> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_struct("BufferedReaderLimitor")
diff --git a/buffered-reader/src/memory.rs b/buffered-reader/src/memory.rs
index a7e8c1de..fc94f8fb 100644
--- a/buffered-reader/src/memory.rs
+++ b/buffered-reader/src/memory.rs
@@ -20,6 +20,13 @@ pub struct BufferedReaderMemory<'a, C> {
     cookie: C,
 }
 
+impl<'a, C> fmt::Display for BufferedReaderMemory<'a, C> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "BufferedReaderMemory ({} of {} bytes read)",
+               self.cursor, self.buffer.len())
+    }
+}
+
 impl<'a, C> fmt::Debug for BufferedReaderMemory<'a, C> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_struct("BufferedReaderMemory")
diff --git a/buffered-reader/src/reserve.rs b/buffered-reader/src/reserve.rs
index 24927913..717c29ac 100644
--- a/buffered-reader/src/reserve.rs
+++ b/buffered-reader/src/reserve.rs
@@ -16,6 +16,12 @@ pub struct BufferedReaderReserve<'a, C> {
     cookie: C,
 }
 
+impl<'a, C> fmt::Display for BufferedReaderReserve<'a, C> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "BufferedReaderReserve ({} bytes)", self.reserve)
+    }
+}
+
 impl<'a, C> fmt::Debug for BufferedReaderReserve<'a, C> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_struct("BufferedReaderReserve")