some tuple implementations for bitread

src/read.rs

@@ -266,6 +266,55 @@ impl<T: BitSize> BitSize for Box<T> {
     }
 }
 
+impl<E: Endianness, T1: BitRead<E>, T2: BitRead<E>> BitRead<E> for (T1, T2) {
+    #[inline]
+    fn read(stream: &mut BitStream<E>) -> Result<Self> {
+        Ok((T1::read(stream)?, T2::read(stream)?))
+    }
+}
+
+impl<E: Endianness, T1: BitRead<E>, T2: BitRead<E>, T3: BitRead<E>> BitRead<E> for (T1, T2, T3) {
+    #[inline]
+    fn read(stream: &mut BitStream<E>) -> Result<Self> {
+        Ok((T1::read(stream)?, T2::read(stream)?, T3::read(stream)?))
+    }
+}
+
+impl<E: Endianness, T1: BitRead<E>, T2: BitRead<E>, T3: BitRead<E>, T4: BitRead<E>> BitRead<E>
+    for (T1, T2, T3, T4)
+{
+    #[inline]
+    fn read(stream: &mut BitStream<E>) -> Result<Self> {
+        Ok((
+            T1::read(stream)?,
+            T2::read(stream)?,
+            T3::read(stream)?,
+            T4::read(stream)?,
+        ))
+    }
+}
+
+impl<T1: BitSize, T2: BitSize> BitSize for (T1, T2) {
+    #[inline]
+    fn bit_size() -> usize {
+        T1::bit_size() + T2::bit_size()
+    }
+}
+
+impl<T1: BitSize, T2: BitSize, T3: BitSize> BitSize for (T1, T2, T3) {
+    #[inline]
+    fn bit_size() -> usize {
+        T1::bit_size() + T2::bit_size() + T3::bit_size()
+    }
+}
+
+impl<T1: BitSize, T2: BitSize, T3: BitSize, T4: BitSize> BitSize for (T1, T2, T3, T4) {
+    #[inline]
+    fn bit_size() -> usize {
+        T1::bit_size() + T2::bit_size() + T3::bit_size() + T4::bit_size()
+    }
+}
+
 /// Trait for types that can be read from a stream, requiring the size to be configured
 ///
 /// The meaning of the set sized depends on the type being read (e.g, number of bits for integers,