From 23a04b880fd678033611143c4b5d78fda57356f5 Mon Sep 17 00:00:00 2001
From: ZapAnton <wc3ft2@gmail.com>
Date: Wed, 8 Aug 2018 00:32:32 +0300
Subject: [PATCH 1/2] circular-buffer: Added template to the stub file

---
 exercises/circular-buffer/src/lib.rs | 43 ++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/exercises/circular-buffer/src/lib.rs b/exercises/circular-buffer/src/lib.rs
index 8b1378917..c655a5965 100644
--- a/exercises/circular-buffer/src/lib.rs
+++ b/exercises/circular-buffer/src/lib.rs
@@ -1 +1,44 @@
+use std::fmt::Debug;
+use std::marker::PhantomData;
 
+pub struct CircularBuffer<T: Debug> {
+    // This field is here to make the template compile and not to
+    // complain about unused type parameter 'T'. Once you start
+    // solving the exercise, delete this field and the 'std::marker::PhantomData'
+    // import.
+    field: PhantomData<T>,
+}
+
+#[derive(Debug, PartialEq)]
+pub enum Error {
+    EmptyBuffer,
+    FullBuffer,
+}
+
+impl<T: Debug> CircularBuffer<T> {
+    pub fn new(capacity: usize) -> Self {
+        unimplemented!(
+            "Construct a new CircularBuffer with the capacity to hold {}.",
+            match capacity {
+                1 => format!("1 element"),
+                _ => format!("{} elements", capacity),
+            }
+        );
+    }
+
+    pub fn write(&mut self, element: T) -> Result<(), Error> {
+        unimplemented!("Write the element '{:?}' to the CircularBuffer or return FullBuffer error if CircularBuffer is full.", element);
+    }
+
+    pub fn read(&mut self) -> Result<T, Error> {
+        unimplemented!("Read the oldest element from the CircularBuffer or return EmptyBuffer error if CircularBuffer is empty.");
+    }
+
+    pub fn clear(&mut self) {
+        unimplemented!("Clear the CircularBuffer.");
+    }
+
+    pub fn overwrite(&mut self, element: T) {
+        unimplemented!("Write the element '{:?}' to the CircularBuffer, overwriting the existing elements if CircularBuffer is full.", element);
+    }
+}

From 0f1a6baa1898f47c58dd15c0aaf1ea61e4a68f92 Mon Sep 17 00:00:00 2001
From: ZapAnton <wc3ft2@gmail.com>
Date: Mon, 20 Aug 2018 09:26:04 +0300
Subject: [PATCH 2/2] circular-buffer: Removed the Debug trait bound from the
 stub file template

---
 exercises/circular-buffer/src/lib.rs | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/exercises/circular-buffer/src/lib.rs b/exercises/circular-buffer/src/lib.rs
index c655a5965..ed53f6ab7 100644
--- a/exercises/circular-buffer/src/lib.rs
+++ b/exercises/circular-buffer/src/lib.rs
@@ -1,7 +1,6 @@
-use std::fmt::Debug;
 use std::marker::PhantomData;
 
-pub struct CircularBuffer<T: Debug> {
+pub struct CircularBuffer<T> {
     // This field is here to make the template compile and not to
     // complain about unused type parameter 'T'. Once you start
     // solving the exercise, delete this field and the 'std::marker::PhantomData'
@@ -15,7 +14,7 @@ pub enum Error {
     FullBuffer,
 }
 
-impl<T: Debug> CircularBuffer<T> {
+impl<T> CircularBuffer<T> {
     pub fn new(capacity: usize) -> Self {
         unimplemented!(
             "Construct a new CircularBuffer with the capacity to hold {}.",
@@ -26,8 +25,8 @@ impl<T: Debug> CircularBuffer<T> {
         );
     }
 
-    pub fn write(&mut self, element: T) -> Result<(), Error> {
-        unimplemented!("Write the element '{:?}' to the CircularBuffer or return FullBuffer error if CircularBuffer is full.", element);
+    pub fn write(&mut self, _element: T) -> Result<(), Error> {
+        unimplemented!("Write the passed element to the CircularBuffer or return FullBuffer error if CircularBuffer is full.");
     }
 
     pub fn read(&mut self) -> Result<T, Error> {
@@ -38,7 +37,7 @@ impl<T: Debug> CircularBuffer<T> {
         unimplemented!("Clear the CircularBuffer.");
     }
 
-    pub fn overwrite(&mut self, element: T) {
-        unimplemented!("Write the element '{:?}' to the CircularBuffer, overwriting the existing elements if CircularBuffer is full.", element);
+    pub fn overwrite(&mut self, _element: T) {
+        unimplemented!("Write the passed element to the CircularBuffer, overwriting the existing elements if CircularBuffer is full.");
     }
 }