`memset(&some_struct,0,sizeof some_struct);`, for starters. I don't know (or care) if some random chunk of the C++ spec says that's disallowed, but it happens i

`memset(&some_struct,0,sizeof some_struct);`, for starters. I don't know (or care) if some random chunk of the C++ spec says that's disallowed, but it happens in quite a lot of working code. I also use `if(!this) return PLACEHOLDER;` (in non-virtual methods) a fair bit, which amounts to the same thing: C++ says it never happens, C++ is wrong as a matter of observed fact.