Anonymous struts and unions allow fine grained control of memory layout in embedded code. (I am not 100% sure this is not UB but I have seen it in a lot of embe

Anonymous struts and unions allow fine grained control of memory layout in embedded code. (I am not 100% sure this is not UB but I have seen it in a lot of embedded code) Not sure if this is impossible in C++, I think some of the alignment functionality added in the past several versions might cover this, but it is not as simple. IMHO, Not a big reason since every compiler offers some non-standard keywords to cover this use case, but a reason nonetheless