Fix clippy warnings

And fix bench.

benches/lib.rs

@@ -4,12 +4,12 @@ extern crate test;
 extern crate rusqlite;
 
 use rusqlite::Connection;
-use rusqlite::cache::StatementCache;
 use test::Bencher;
 
 #[bench]
 fn bench_no_cache(b: &mut Bencher) {
     let db = Connection::open_in_memory().unwrap();
+    db.set_prepared_statement_cache_capacity(0);
     let sql = "SELECT 1, 'test', 3.14 UNION SELECT 2, 'exp', 2.71";
     b.iter(|| db.prepare(sql).unwrap());
 }
@@ -17,7 +17,6 @@ fn bench_no_cache(b: &mut Bencher) {
 #[bench]
 fn bench_cache(b: &mut Bencher) {
     let db = Connection::open_in_memory().unwrap();
-    let cache = StatementCache::new(&db, 15);
     let sql = "SELECT 1, 'test', 3.14 UNION SELECT 2, 'exp', 2.71";
-    b.iter(|| cache.get(sql).unwrap());
+    b.iter(|| db.prepare_cached(sql).unwrap());
 }

src/functions.rs

@@ -79,7 +79,7 @@ fn set_result<'a>(ctx: *mut sqlite3_context, result: &ToSqlOutput<'a>) {
         ValueRef::Null => unsafe { ffi::sqlite3_result_null(ctx) },
         ValueRef::Integer(i) => unsafe { ffi::sqlite3_result_int64(ctx, i) },
         ValueRef::Real(r) => unsafe { ffi::sqlite3_result_double(ctx, r) },
-        ValueRef::Text(ref s) => unsafe {
+        ValueRef::Text(s) => unsafe {
             let length = s.len();
             if length > ::std::i32::MAX as usize {
                 ffi::sqlite3_result_error_toobig(ctx);
@@ -97,7 +97,7 @@ fn set_result<'a>(ctx: *mut sqlite3_context, result: &ToSqlOutput<'a>) {
                 ffi::sqlite3_result_text(ctx, c_str.as_ptr(), length as c_int, destructor);
             }
         },
-        ValueRef::Blob(ref b) => unsafe {
+        ValueRef::Blob(b) => unsafe {
             let length = b.len();
             if length > ::std::i32::MAX as usize {
                 ffi::sqlite3_result_error_toobig(ctx);
@@ -114,8 +114,8 @@ fn set_result<'a>(ctx: *mut sqlite3_context, result: &ToSqlOutput<'a>) {
 }
 
 unsafe fn report_error(ctx: *mut sqlite3_context, err: &Error) {
-    match err {
+    match *err {
-        &Error::SqliteFailure(ref err, ref s) => {
+        Error::SqliteFailure(ref err, ref s) => {
             ffi::sqlite3_result_error_code(ctx, err.extended_code);
             if let Some(Ok(cstr)) = s.as_ref().map(|s| str_to_cstring(s)) {
                 ffi::sqlite3_result_error(ctx, cstr.as_ptr(), -1);

src/lib.rs

@@ -596,7 +596,8 @@ fn ensure_valid_sqlite_version() {
         let runtime_major = version_number / 1_000_000;
         if buildtime_major != runtime_major {
             panic!("rusqlite was built against SQLite {} but is running with SQLite {}",
-                   str::from_utf8(ffi::SQLITE_VERSION).unwrap(), version());
+                   str::from_utf8(ffi::SQLITE_VERSION).unwrap(),
+                   version());
         }
 
         if BYPASS_VERSION_CHECK.load(Ordering::Relaxed) {
@@ -611,7 +612,9 @@ rusqlite was built against SQLite {} but the runtime SQLite version is {}. To fi
 * Recompile rusqlite and link against the SQLite version you are using at runtime, or
 * Call rusqlite::bypass_sqlite_version_check() prior to your first connection attempt. Doing this
   means you're sure everything will work correctly even though the runtime version is older than
-  the version we found at build time.", str::from_utf8(ffi::SQLITE_VERSION).unwrap(), version());
+  the version we found at build time.",
+                   str::from_utf8(ffi::SQLITE_VERSION).unwrap(),
+                   version());
         }
     });
 }
@@ -685,7 +688,7 @@ impl InnerConnection {
         // wasn't added until version 3.7.3.
         debug_assert!(1 << SQLITE_OPEN_READ_ONLY.bits == 0x02);
         debug_assert!(1 << SQLITE_OPEN_READ_WRITE.bits == 0x04);
-        debug_assert!(1 << (SQLITE_OPEN_READ_WRITE|SQLITE_OPEN_CREATE).bits == 0x40);
+        debug_assert!(1 << (SQLITE_OPEN_READ_WRITE | SQLITE_OPEN_CREATE).bits == 0x40);
         if (1 << (flags.bits & 0x7)) & 0x46 == 0 {
             return Err(Error::SqliteFailure(ffi::Error::new(ffi::SQLITE_MISUSE), None));
         }

src/types/chrono.rs

@@ -104,9 +104,8 @@ impl FromSql for DateTime<UTC> {
                 Cow::Borrowed(s)
             };
 
-            match DateTime::parse_from_rfc3339(&s) {
+            if let Ok(dt) = DateTime::parse_from_rfc3339(&s) {
-                Ok(dt) => return Ok(dt.with_timezone(&UTC)),
+                return Ok(dt.with_timezone(&UTC));
-                Err(_) => (),
             }
         }
 

src/types/serde_json.rs

@@ -17,8 +17,8 @@ impl ToSql for Value {
 impl FromSql for Value {
     fn column_result(value: ValueRef) -> FromSqlResult<Self> {
         match value {
-                ValueRef::Text(ref s) => serde_json::from_str(s),
+                ValueRef::Text(s) => serde_json::from_str(s),
-                ValueRef::Blob(ref b) => serde_json::from_slice(b),
+                ValueRef::Blob(b) => serde_json::from_slice(b),
                 _ => return Err(FromSqlError::InvalidType),
             }
             .map_err(|err| FromSqlError::Other(Box::new(err)))