Fix #190 Add Statement move constructor

include/SQLiteCpp/Database.h

@@ -124,13 +124,13 @@ public:
     /**
      * @brief Move an SQLite database connection.
      *
-     * @param[in] aDb   Database to move
+     * @param[in] aDatabase Database to move
      */
-    inline Database(Database&& aDb) noexcept :
+    inline Database(Database&& aDatabase) noexcept :
-        mpSQLite(aDb.mpSQLite),
+        mpSQLite(aDatabase.mpSQLite),
-        mFilename(std::move(aDb.mFilename))
+        mFilename(std::move(aDatabase.mFilename))
     {
-        aDb.mpSQLite = nullptr;
+        aDatabase.mpSQLite = nullptr;
     }
 #endif
 

include/SQLiteCpp/Statement.h

@@ -73,6 +73,15 @@ public:
      */
     Statement(Database& aDatabase, const std::string& aQuery);
 
+#if __cplusplus >= 201103L || (defined(_MSC_VER) && _MSC_VER >= 1600)
+    /**
+     * @brief Move an SQLite statement.
+     *
+     * @param[in] aStatement    Statement to move
+     */
+    Statement(Statement&& aStatement) noexcept;
+#endif
+
     /// Finalize and unregister the SQL query from the SQLite Database Connection.
     ~Statement();
 
@@ -719,7 +728,7 @@ private:
     Ptr                     mStmtPtr;       //!< Shared Pointer to the prepared SQLite Statement Object
     int                     mColumnCount;   //!< Number of columns in the result of the prepared statement
     mutable TColumnNames    mColumnNames;   //!< Map of columns index by name (mutable so getColumnIndex can be const)
-    bool                    mbHasRow;           //!< true when a row has been fetched with executeStep()
+    bool                    mbHasRow;       //!< true when a row has been fetched with executeStep()
     bool                    mbDone;         //!< true when the last executeStep() had no more row to fetch
 };
 

src/Statement.cpp

@@ -42,6 +42,19 @@ Statement::Statement(Database &aDatabase, const std::string& aQuery) :
     mColumnCount = sqlite3_column_count(mStmtPtr);
 }
 
+#if __cplusplus >= 201103L || (defined(_MSC_VER) && _MSC_VER >= 1600)
+Statement::Statement(Statement&& aStatement) noexcept :
+    mQuery(std::move(aStatement.mQuery)),
+    mStmtPtr(std::move(aStatement.mStmtPtr)),
+    mColumnCount(aStatement.mColumnCount),
+    mbHasRow(aStatement.mbHasRow),
+    mbDone(aStatement.mbDone)
+{
+    aStatement.mColumnCount = 0;
+    aStatement.mbHasRow = false;
+    aStatement.mbDone = false;
+}
+#endif
 
 // Finalize and unregister the SQL query from the SQLite Database Connection.
 Statement::~Statement()

tests/Statement_test.cpp

@@ -96,6 +96,40 @@ TEST(Statement, invalid) {
     EXPECT_THROW(query.exec(), SQLite::Exception); // exec() shall throw as it does not expect a result
 }
 
+#if __cplusplus >= 201103L || (defined(_MSC_VER) && _MSC_VER >= 1600)
+
+SQLite::Statement StatementBuilder(SQLite::Database& aDb, const char* apQuery)
+{
+    return SQLite::Statement(aDb, apQuery);
+}
+
+TEST(Statement, moveConstructor) {
+    // Create a new database
+    SQLite::Database db(":memory:", SQLite::OPEN_READWRITE | SQLite::OPEN_CREATE);
+    EXPECT_EQ(0, db.exec("CREATE TABLE test (id INTEGER PRIMARY KEY, value TEXT)"));
+    EXPECT_EQ(1, db.exec("INSERT INTO test VALUES (NULL, \"first\")"));
+    EXPECT_EQ(1, db.getLastInsertRowid());
+
+    SQLite::Statement query = StatementBuilder(db, "SELECT * FROM test");
+    EXPECT_FALSE(query.getQuery().empty());
+    EXPECT_FALSE(query.hasRow());
+    EXPECT_FALSE(query.isDone());
+    EXPECT_EQ(2, query.getColumnCount());
+    SQLite::Statement moved = std::move(query);
+    EXPECT_TRUE(query.getQuery().empty());
+    EXPECT_EQ(0, query.getColumnCount());
+    EXPECT_FALSE(moved.getQuery().empty());
+    EXPECT_EQ(2, moved.getColumnCount());
+    // Execute
+    moved.executeStep();
+    EXPECT_TRUE(moved.hasRow());
+    EXPECT_FALSE(moved.isDone());
+    EXPECT_FALSE(query.hasRow());
+    EXPECT_FALSE(query.isDone());
+}
+
+#endif
+
 TEST(Statement, executeStep) {
     // Create a new database
     SQLite::Database db(":memory:", SQLite::OPEN_READWRITE|SQLite::OPEN_CREATE);