Fix all warnings

src/lib.rs

@@ -13,9 +13,6 @@
    See the License for the specific language governing permissions and
    limitations under the License.
 */
-#![crate_id = "rocksdb"]
-#![crate_type = "lib"]
-
 pub use ffi as rocksdb_ffi;
 pub use ffi::{new_bloom_filter, DBCompactionStyle, DBComparator};
 pub use rocksdb::{DB, DBResult, DBVector, WriteBatch, Writable, Direction};

src/main.rs

@@ -14,8 +14,7 @@
    limitations under the License.
 */
 extern crate rocksdb;
-use rocksdb::{Options, DB, MergeOperands, new_bloom_filter, Writable, };
-use rocksdb::DBCompactionStyle::DBUniversalCompaction;
+use rocksdb::{Options, DB, MergeOperands, Writable, };
 
 //fn snapshot_test() {
 //    let path = "_rust_rocksdb_iteratortest";
@@ -47,7 +46,7 @@ use rocksdb::DBCompactionStyle::DBUniversalCompaction;
 #[cfg(not(feature = "valgrind"))]
 fn main() {
     let path = "/tmp/rust-rocksdb";
-    let mut db = DB::open_default(path).unwrap();
+    let db = DB::open_default(path).unwrap();
     assert!(db.put(b"my key", b"my value").is_ok());
     db.get(b"my key").map( |value| {
             match value.to_utf8() {
@@ -65,8 +64,8 @@ fn main() {
     custom_merge();
 }
 
-fn concat_merge(new_key: &[u8], existing_val: Option<&[u8]>,
-    mut operands: &mut MergeOperands) -> Vec<u8> {
+fn concat_merge(_: &[u8], existing_val: Option<&[u8]>,
+    operands: &mut MergeOperands) -> Vec<u8> {
     let mut result: Vec<u8> = Vec::with_capacity(operands.size_hint().0);
     match existing_val {
         Some(v) => for e in v {
@@ -88,13 +87,13 @@ fn custom_merge() {
     opts.create_if_missing(true);
     opts.add_merge_operator("test operator", concat_merge);
     {
-        let mut db = DB::open(&opts, path).unwrap();
-        db.put(b"k1", b"a");
-        db.merge(b"k1", b"b");
-        db.merge(b"k1", b"c");
-        db.merge(b"k1", b"d");
-        db.merge(b"k1", b"efg");
-        db.merge(b"k1", b"h");
+        let db = DB::open(&opts, path).unwrap();
+        db.put(b"k1", b"a").unwrap();
+        db.merge(b"k1", b"b").unwrap();
+        db.merge(b"k1", b"c").unwrap();
+        db.merge(b"k1", b"d").unwrap();
+        db.merge(b"k1", b"efg").unwrap();
+        db.merge(b"k1", b"h").unwrap();
         db.get(b"k1").map( |value| {
                 match value.to_utf8() {
                 Some(v) =>

test/test_column_family.rs

@@ -13,7 +13,7 @@
    See the License for the specific language governing permissions and
    limitations under the License.
 */
-use rocksdb::{Options, DB, DBResult, Writable, Direction, MergeOperands};
+use rocksdb::{Options, DB, Writable, MergeOperands};
 
 #[test]
 pub fn test_column_family() {
@@ -58,7 +58,7 @@ pub fn test_column_family() {
     {
         let mut opts = Options::new();
         opts.add_merge_operator("test operator", test_provided_merge);
-        let mut db = match DB::open_cf(&opts, path, &["cf1"]) {
+        let db = match DB::open_cf(&opts, path, &["cf1"]) {
             Ok(db) => {
                 println!("successfully opened db with column family");
                 db
@@ -70,10 +70,10 @@ pub fn test_column_family() {
         assert!(db.get_cf(cf1, b"k1").unwrap().to_utf8().unwrap() == "v1");
         let p = db.put_cf(cf1, b"k1", b"a");
         assert!(p.is_ok());
-        db.merge_cf(cf1, b"k1", b"b");
-        db.merge_cf(cf1, b"k1", b"c");
-        db.merge_cf(cf1, b"k1", b"d");
-        db.merge_cf(cf1, b"k1", b"efg");
+        db.merge_cf(cf1, b"k1", b"b").unwrap();
+        db.merge_cf(cf1, b"k1", b"c").unwrap();
+        db.merge_cf(cf1, b"k1", b"d").unwrap();
+        db.merge_cf(cf1, b"k1", b"efg").unwrap();
         let m = db.merge_cf(cf1, b"k1", b"h");
         println!("m is {:?}", m);
         // TODO assert!(m.is_ok());
@@ -85,9 +85,9 @@ pub fn test_column_family() {
                 println!("did not read valid utf-8 out of the db"),
                 }
                 }).on_absent( || { println!("value not present!") })
-        .on_error( |e| { println!("error reading value")}); //: {", e) });
+        .on_error( |_| { println!("error reading value")}); //: {", e) });
 
-        let r = db.get_cf(cf1, b"k1");
+        let _ = db.get_cf(cf1, b"k1");
         // TODO assert!(r.unwrap().to_utf8().unwrap() == "abcdefgh");
         assert!(db.delete(b"k1").is_ok());
         assert!(db.get(b"k1").is_none());
@@ -110,9 +110,9 @@ pub fn test_column_family() {
     assert!(DB::destroy(&Options::new(), path).is_ok());
 }
 
-fn test_provided_merge(new_key: &[u8],
+fn test_provided_merge(_: &[u8],
                        existing_val: Option<&[u8]>,
-                       mut operands: &mut MergeOperands)
+                       operands: &mut MergeOperands)
                        -> Vec<u8> {
     let nops = operands.size_hint().0;
     let mut result: Vec<u8> = Vec::with_capacity(nops);

test/test_iterator.rs

@@ -1,5 +1,4 @@
 use rocksdb::{Options, DB, Writable, Direction};
-use std;
 
 fn cba(input: &Box<[u8]>) -> Box<[u8]> {
     input.iter().cloned().collect::<Vec<_>>().into_boxed_slice()
@@ -17,7 +16,7 @@ pub fn test_iterator() {
         let v2:Box<[u8]> = b"v2222".to_vec().into_boxed_slice();
         let v3:Box<[u8]> = b"v3333".to_vec().into_boxed_slice();
         let v4:Box<[u8]> = b"v4444".to_vec().into_boxed_slice();
-        let mut db = DB::open_default(path).unwrap();
+        let db = DB::open_default(path).unwrap();
         let p = db.put(&*k1, &*v1);
         assert!(p.is_ok());
         let p = db.put(&*k2, &*v2);
@@ -27,83 +26,82 @@ pub fn test_iterator() {
         let mut view1 = db.iterator();
         let expected = vec![(cba(&k1), cba(&v1)), (cba(&k2), cba(&v2)), (cba(&k3), cba(&v3))];
         {
-            let mut iterator1 = view1.from_start();
+            let iterator1 = view1.from_start();
             assert_eq!(iterator1.collect::<Vec<_>>(), expected);
         }
         // Test that it's reusable a few times
         {
-            let mut iterator1 = view1.from_start();
+            let iterator1 = view1.from_start();
             assert_eq!(iterator1.collect::<Vec<_>>(), expected);
         }
         {
-            let mut iterator1 = view1.from_start();
+            let iterator1 = view1.from_start();
             assert_eq!(iterator1.collect::<Vec<_>>(), expected);
         }
         {
-            let mut iterator1 = view1.from_start();
+            let iterator1 = view1.from_start();
             assert_eq!(iterator1.collect::<Vec<_>>(), expected);
         }
         // Test it in reverse a few times
         {
-            let mut iterator1 = view1.from_end();
+            let iterator1 = view1.from_end();
             let mut tmp_vec = iterator1.collect::<Vec<_>>();
             tmp_vec.reverse();
             assert_eq!(tmp_vec, expected);
         }
         {
-            let mut iterator1 = view1.from_end();
+            let iterator1 = view1.from_end();
             let mut tmp_vec = iterator1.collect::<Vec<_>>();
             tmp_vec.reverse();
             assert_eq!(tmp_vec, expected);
         }
         {
-            let mut iterator1 = view1.from_end();
+            let iterator1 = view1.from_end();
             let mut tmp_vec = iterator1.collect::<Vec<_>>();
             tmp_vec.reverse();
             assert_eq!(tmp_vec, expected);
         }
         {
-            let mut iterator1 = view1.from_end();
+            let iterator1 = view1.from_end();
             let mut tmp_vec = iterator1.collect::<Vec<_>>();
             tmp_vec.reverse();
             assert_eq!(tmp_vec, expected);
         }
         {
-            let mut iterator1 = view1.from_end();
+            let iterator1 = view1.from_end();
             let mut tmp_vec = iterator1.collect::<Vec<_>>();
             tmp_vec.reverse();
             assert_eq!(tmp_vec, expected);
         }
         // Try it forward again
         {
-            let mut iterator1 = view1.from_start();
+            let iterator1 = view1.from_start();
             assert_eq!(iterator1.collect::<Vec<_>>(), expected);
         }
         {
-            let mut iterator1 = view1.from_start();
+            let iterator1 = view1.from_start();
             assert_eq!(iterator1.collect::<Vec<_>>(), expected);
         }
 
-        let mut view2 = db.iterator();
         let p = db.put(&*k4, &*v4);
         assert!(p.is_ok());
         let mut view3 = db.iterator();
         let expected2 = vec![(cba(&k1), cba(&v1)), (cba(&k2), cba(&v2)), (cba(&k3), cba(&v3)), (cba(&k4), cba(&v4))];
         {
-            let mut iterator1 = view1.from_start();
+            let iterator1 = view1.from_start();
             assert_eq!(iterator1.collect::<Vec<_>>(), expected);
         }
         {
-            let mut iterator1 = view3.from_start();
+            let iterator1 = view3.from_start();
             assert_eq!(iterator1.collect::<Vec<_>>(), expected2);
         }
         {
-            let mut iterator1 = view3.from(b"k2", Direction::forward);
+            let iterator1 = view3.from(b"k2", Direction::forward);
             let expected = vec![(cba(&k2), cba(&v2)), (cba(&k3), cba(&v3)), (cba(&k4), cba(&v4))];
             assert_eq!(iterator1.collect::<Vec<_>>(), expected);
         }
         {
-            let mut iterator1 = view3.from(b"k2", Direction::reverse);
+            let iterator1 = view3.from(b"k2", Direction::reverse);
             let expected = vec![(cba(&k2), cba(&v2)), (cba(&k1), cba(&v1))];
             assert_eq!(iterator1.collect::<Vec<_>>(), expected);
         }

test/test_multithreaded.rs

@@ -1,5 +1,5 @@
-use rocksdb::{Options, DB, Writable, Direction, DBResult};
-use std::thread::{self, Builder};
+use rocksdb::{Options, DB, Writable, DBResult};
+use std::thread;
 use std::sync::Arc;
 
 const N: usize = 100_000;
@@ -11,25 +11,25 @@ pub fn test_multithreaded() {
         let db = DB::open_default(path).unwrap();
         let db = Arc::new(db);
 
-        db.put(b"key", b"value1");
+        db.put(b"key", b"value1").unwrap();
 
         let db1 = db.clone();
         let j1 = thread::spawn(move|| {
-            for i in 1..N {
-                db1.put(b"key", b"value1");
+            for _ in 1..N {
+                db1.put(b"key", b"value1").unwrap();
             }
         });
 
         let db2 = db.clone();
         let j2 = thread::spawn(move|| {
-            for i in 1..N {
-                db2.put(b"key", b"value2");
+            for _ in 1..N {
+                db2.put(b"key", b"value2").unwrap();
             }
         });
 
         let db3 = db.clone();
         let j3 = thread::spawn(move|| {
-            for i in 1..N {
+            for _ in 1..N {
                 match db3.get(b"key") {
                     DBResult::Some(v) => {
                         if &v[..] != b"value1" && &v[..] != b"value2" {
@@ -43,9 +43,9 @@ pub fn test_multithreaded() {
             }
         });
 
-        j1.join();
-        j2.join();
-        j3.join();
+        j1.join().unwrap();
+        j2.join().unwrap();
+        j3.join().unwrap();
     }
     assert!(DB::destroy(&Options::new(), path).is_ok());
 }