C++: Difference between revisions

C++ (view source)

133 bytes removed , 24 October 2019

5,321

edits

@@ Line 175: / Line 175: @@
 There are a few ways to do this:
 * Use smart pointers
-* Copy-and-swap idiom [https://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom Reference]
+* Swap
 * Call a clear/shrink/deallocate function
 Example [https://stackoverflow.com/questions/3054567/right-way-to-deallocate-an-stdvector-object Reference]:
@@ Line 183: / Line 183: @@
 my_vector.reset();
-// Copy-and-swap idiom
+// Swap
 std::vector<float> my_vector(99);
-std::vector<float>().swap(my_vector);
+my_vector = std::vector<float>;
+// Or alternatively
+// std::vector<float>().swap(my_vector);
 // Copy-and-swap for cl::Buffer
 cl::Buffer my_buf(context, CL_MEM_READ_WRITE, size);
-{
+my_buf = cl::Buffer();
-  // Moves ownership to temp
-  cl::Buffer temp(my_buf);
-  // or cl::Buffer temp = my_buf;
-}
 // Clear and shrink