The Old New Thing

In C++, how can I make a default parameter be the this pointer of the caller?

December 7, 2023 Dec 7, 2023 12/7/23

Raymond Chen

Again, you can't, but you can fake it.

In C++, how can I make a member function default parameter depend on this?

December 6, 2023 Dec 6, 2023 12/6/23

Raymond Chen

You can't, but you can fake it.

What is a static chain pointer in the context of calling convention ABI?

December 4, 2023 Dec 4, 2023 12/4/23

Raymond Chen

Buried in the System V Application Binary Interface.

On harmful overuse of std::move

November 24, 2023 Nov 24, 2023 11/24/23

Raymond Chen

Initial excitement leads to overuse.

On the need to keep most event sources alive if you want them to raise events

November 23, 2023 Nov 23, 2023 11/23/23

Raymond Chen

You can't receive a notification from something that doesn't exist.

How can I convert a Windows Runtime Software­Bitmap to a WIC bitmap?

November 22, 2023 Nov 22, 2023 11/22/23

Raymond Chen

The reverse of ISoftware­Bitmap­Native­Factory::Create­From­WIC­Bitmap.

If you’re going to crash on an unhandled exception, you may as well do it sooner rather than later

November 20, 2023 Nov 20, 2023 11/20/23

Raymond Chen

Avoiding the problem discovered by the case of the invalid argument exception from a method that takes no arguments.

The theory behind the IHttpFilter interface

November 17, 2023 Nov 17, 2023 11/17/23

Raymond Chen

Layering features on top of each other.

What happened to the custom exception description I threw from a C++/WinRT IAsyncAction?

November 16, 2023 Nov 16, 2023 11/16/23

Raymond Chen

The description is just a courtesy and is not part of the API contract.

Why does calling a coroutine allocate a lot of stack space even though the coroutine frame is on the heap?

November 15, 2023 Nov 15, 2023 11/15/23

Raymond Chen

Heap elision optimization kicks in, and doesn't kick out.