Can't build a project using WinAppSDK and latest C++/winrt when in C++20 mode "IComponentConnector2 identifier not found" #1155
Description
Compiler error "IComponentConnector2 identifier not found" in winrt/Microsoft.UI.Xaml.Markup.h.
This generated code:
static constexpr bool m_has_connectable_base{
impl::has_initializer<composable_base>::value &&
impl::has_interface<D, IComponentConnector>() &&
impl::has_interface<D, IComponentConnector2>() };
IComponentConnector2 doesn't exist - it was folded into IComponentConnector in WinUI. this doesn't generate an error in C++17 mode, but does in C++20.
Rolling back to the previous C++/winrt doesn't generate this error.
This is with latest non-preview (as of 6/5) Visual Studio, WinApp SDK 1.0, and C++/WinRT 531
Visual Studio 17.2.3
C++/Winrt 2.0.220531.1
Windows App SDK 1.0
Steps to reproduce the bug
Create a WinAppSDK WinUI 3 Desktop project - no changes from template.
Build - confirm no errors.
Switch to C++20 mode in Language options in MSVC
Rebuild
Expected behavior
Builds without issue.
Actual behavior:
Error, "IComponentConnector2 identifier not found"