[picacho]

from compiler's point of view, C++ doesn't really added that much features, and quite stable. imho i believe the C++ ISO committee does consider the possibilities compiler writers are able to implement these features. e.g lambda expression, there's always operator() overloaded available in C++98; Variable template, only allowed in namespace, aka. static member data member in template type; CTAD, take template function argument deduce mechanism and wrap-up for ya; auto, same as template argument, and C++'s template argument is the same as C's typedef, etc. that is to say, to some extend, C++'s features are also written in C++. The new idea could think of is the r-value type, which invented to trigger move constructor, again, using the existing function overloading mechanism to do the job. This maybe not engineering friendly which the writer has to manually nullify the moved object's internal pointers as for Rust just using type system to prevent you from using it.