try! -> ?

src/cursor.rs

@@ -28,7 +28,7 @@ pub trait Cursor<'txn> {
             let mut key_val = slice_to_val(key);
             let mut data_val = slice_to_val(data);
             let key_ptr = key_val.mv_data;
-            try!(lmdb_result(ffi::mdb_cursor_get(self.cursor(), &mut key_val, &mut data_val, op)));
+            lmdb_result(ffi::mdb_cursor_get(self.cursor(), &mut key_val, &mut data_val, op))?;
             let key_out = if key_ptr != key_val.mv_data { Some(val_to_slice(key_val)) } else { None };
             let data_out = val_to_slice(data_val);
             Ok((key_out, data_out))
@@ -91,7 +91,7 @@ pub trait Cursor<'txn> {
     /// key.
     fn iter_dup_of<K>(&mut self, key: &K) -> Result<Iter<'txn>> where K:
         AsRef<[u8]> {
-        try!(self.get(Some(key.as_ref()), None, ffi::MDB_SET));
+        self.get(Some(key.as_ref()), None, ffi::MDB_SET)?;
         Ok(Iter::new(self.cursor(), ffi::MDB_GET_CURRENT, ffi::MDB_NEXT_DUP))
     }
 }
@@ -127,7 +127,7 @@ impl <'txn> RoCursor<'txn> {
     #[doc(hidden)]
     pub fn new<T>(txn: &'txn T, db: Database) -> Result<RoCursor<'txn>> where T: Transaction {
         let mut cursor: *mut ffi::MDB_cursor = ptr::null_mut();
-        unsafe { try!(lmdb_result(ffi::mdb_cursor_open(txn.txn(), db.dbi(), &mut cursor))); }
+        unsafe { lmdb_result(ffi::mdb_cursor_open(txn.txn(), db.dbi(), &mut cursor))?; }
         Ok(RoCursor {
             cursor: cursor,
             _marker: PhantomData,
@@ -166,7 +166,7 @@ impl <'txn> RwCursor<'txn> {
     #[doc(hidden)]
     pub fn new<T>(txn: &'txn T, db: Database) -> Result<RwCursor<'txn>> where T: Transaction {
         let mut cursor: *mut ffi::MDB_cursor = ptr::null_mut();
-        unsafe { try!(lmdb_result(ffi::mdb_cursor_open(txn.txn(), db.dbi(), &mut cursor))); }
+        unsafe { lmdb_result(ffi::mdb_cursor_open(txn.txn(), db.dbi(), &mut cursor))?; }
         Ok(RwCursor { cursor: cursor, _marker: PhantomData })
     }
 

src/database.rs

@@ -28,7 +28,7 @@ impl Database {
         let c_name = name.map(|n| CString::new(n).unwrap());
         let name_ptr = if let Some(ref c_name) = c_name { c_name.as_ptr() } else { ptr::null() };
         let mut dbi: ffi::MDB_dbi = 0;
-        try!(lmdb_result(ffi::mdb_dbi_open(txn, name_ptr, flags, &mut dbi)));
+        lmdb_result(ffi::mdb_dbi_open(txn, name_ptr, flags, &mut dbi))?;
         Ok(Database { dbi: dbi })
     }
 

src/environment.rs

@@ -76,9 +76,9 @@ impl Environment {
     /// The database name may not contain the null character.
     pub fn open_db<'env>(&'env self, name: Option<&str>) -> Result<Database> {
         let mutex = self.dbi_open_mutex.lock();
-        let txn = try!(self.begin_ro_txn());
+        let txn = self.begin_ro_txn()?;
-        let db = unsafe { try!(txn.open_db(name)) };
+        let db = unsafe { txn.open_db(name)? };
-        try!(txn.commit());
+        txn.commit()?;
         drop(mutex);
         Ok(db)
     }
@@ -102,18 +102,18 @@ impl Environment {
                            flags: DatabaseFlags)
                            -> Result<Database> {
         let mutex = self.dbi_open_mutex.lock();
-        let txn = try!(self.begin_rw_txn());
+        let txn = self.begin_rw_txn()?;
-        let db = unsafe { try!(txn.create_db(name, flags)) };
+        let db = unsafe { txn.create_db(name, flags)? };
-        try!(txn.commit());
+        txn.commit()?;
         drop(mutex);
         Ok(db)
     }
 
     pub fn get_db_flags<'env>(&'env self, db: Database) -> Result<DatabaseFlags> {
-        let txn = try!(self.begin_ro_txn());
+        let txn = self.begin_ro_txn()?;
         let mut flags: c_uint = 0;
         unsafe {
-            try!(lmdb_result(ffi::mdb_dbi_flags(txn.txn(), db.dbi(), &mut flags)));
+            lmdb_result(ffi::mdb_dbi_flags(txn.txn(), db.dbi(), &mut flags))?;
         }
         Ok(DatabaseFlags::from_bits(flags).unwrap())
     }

src/transaction.rs

@@ -98,7 +98,7 @@ pub trait Transaction : Sized {
     fn db_flags(&self, db: Database) -> Result<DatabaseFlags> {
         let mut flags: c_uint = 0;
         unsafe {
-            try!(lmdb_result(ffi::mdb_dbi_flags(self.txn(), db.dbi(), &mut flags)));
+            lmdb_result(ffi::mdb_dbi_flags(self.txn(), db.dbi(), &mut flags))?;
         }
         Ok(DatabaseFlags::from_bits_truncate(flags))
     }
@@ -130,10 +130,7 @@ impl <'env> RoTransaction<'env> {
     pub fn new(env: &'env Environment) -> Result<RoTransaction<'env>> {
         let mut txn: *mut ffi::MDB_txn = ptr::null_mut();
         unsafe {
-            try!(lmdb_result(ffi::mdb_txn_begin(env.env(),
+            lmdb_result(ffi::mdb_txn_begin(env.env(), ptr::null_mut(), ffi::MDB_RDONLY, &mut txn))?;
-                                                ptr::null_mut(),
-                                                ffi::MDB_RDONLY,
-                                                &mut txn)));
             Ok(RoTransaction { txn: txn, _marker: PhantomData })
         }
     }
@@ -195,7 +192,7 @@ impl <'env> InactiveTransaction<'env> {
         let txn = self.txn;
         unsafe {
             mem::forget(self);
-            try!(lmdb_result(ffi::mdb_txn_renew(txn)))
+            lmdb_result(ffi::mdb_txn_renew(txn))?
         };
         Ok(RoTransaction { txn: txn, _marker: PhantomData })
     }
@@ -227,10 +224,10 @@ impl <'env> RwTransaction<'env> {
     pub fn new(env: &'env Environment) -> Result<RwTransaction<'env>> {
         let mut txn: *mut ffi::MDB_txn = ptr::null_mut();
         unsafe {
-            try!(lmdb_result(ffi::mdb_txn_begin(env.env(),
+            lmdb_result(ffi::mdb_txn_begin(env.env(),
                         ptr::null_mut(),
                         EnvironmentFlags::empty().bits(),
-                                                &mut txn)));
+                        &mut txn))?;
             Ok(RwTransaction { txn: txn, _marker: PhantomData })
         }
     }
@@ -305,11 +302,11 @@ impl <'env> RwTransaction<'env> {
         let mut data_val: ffi::MDB_val = ffi::MDB_val { mv_size: len,
                                                         mv_data: ptr::null_mut::<c_void>() };
         unsafe {
-            try!(lmdb_result(ffi::mdb_put(self.txn(),
+            lmdb_result(ffi::mdb_put(self.txn(),
                         database.dbi(),
                         &mut key_val,
                         &mut data_val,
-                                          flags.bits() | ffi::MDB_RESERVE)));
+                        flags.bits() | ffi::MDB_RESERVE))?;
             Ok(slice::from_raw_parts_mut(data_val.mv_data as *mut u8,
                                          data_val.mv_size as usize))
         }