[hello_there]

> when stdlib will be more @nogc friendly

How does @nogc work in D? Is it easy to keep track of what needs freeing and what does not or is it easy to mix up and get hard bugs? Also, what do these bugs look like? Is use-after-free possible or how is the failure mode i that case? Is it possible to call free on an object after it's been garbage collected?

[eco]

@nogc just causes the compiler to error out when a GC allocation occurs in the region marked @nogc and its call graph. You are then expected to manage memory yourself. You could rename it @c_or_cpp_style_memory_management_only. You can malloc/free (scope(exit) is useful here), use smart pointers, alloca, static arrays, use Andrei's allocators[1], or whatever else you'd use in C or C++.

The answer to all of your questions is basically the same as they are in C and C++. D does have @safe though which prevents unsafe memory operations and Walter is in the process of ratcheting up the memory safety with DIP1000[2].

1. https://dlang.org/phobos/std_experimental_allocator.html 2. https://github.com/dlang/DIPs/blob/master/DIPs/DIP1000.md