D still has some issues with the safety story, but they have three safety attributes. @system - unsafe code, may do pointer arithmetics, may call C code, @safe

D still has some issues with the safety story, but they have three safety attributes. @system - unsafe code, may do pointer arithmetics, may call C code, @safe - safe code, not allowed to do those things, @trusted - unsafe code, verified by programmer, can be called by @safe. The main issue is that it came late in D lifetime, so until situation improves, @system is the default, because there's too much std/legacy code which still assumes @system as default. Many new projects however start with @safe as default.