What is the point of this UI element?

[capnhyaku]

When the project configurator will forever just generate a main.c and then never compile because 'class' type is not defined...

Seriously STE... take a hint from this and below: Your IDE is bad and you should feel bad.  You have a UX, documentation, and UI problem here.

https://community.st.com/t5/stm32cubeide-mcus/c-with-stm32cubeide/m-p/586876

https://community.st.com/t5/stm32cubeide-mcus/the-main-c-file-generated-with-stm32cubeide-should-replace-its/m-p/136393

https://community.st.com/t5/stm32cubeide-mcus/how-to-generate-main-cpp-with-stm32cubeide/m-p/157101

https://community.st.com/t5/stm32-mcus-touch-gfx-and-gui/stm32cubeide-tocunhgfx-main-c-and-main-cpp/m-p/115292

https://community.st.com/t5/stm32cubeide-mcus/c-project-on-stm32cubeide/m-p/223182

[TDK]

I realize this post is more a rant than a question seeking a solution, but the point of the element is to include the C++ compiler in the project. Files still need to be named appropriately for it to be treated as a C++ file. If that's not checked, and you have *.cpp files in your project, it won't know what to do with them.

[Semer CHERNI]

Hello @capnhyaku 

First let me thank you for posting.

The STM32CubeMX (the code generator) does not generate C++ code it only generate C code.

However, like @TDK  have mentioned, the this check box is used to include C++ compiler in the project in case your project will contain C++ code.
For example, if you are planning to use TouchGFX for graphics you need to check this box as TouchGFX will generate C++ code.

BR,

Semer.