import core.memory;
import core.stdc.stdlib : malloc, free;
import core.lifetime : emplace;
T NEW(T, Args...)(auto ref Args args) if (is(T == class)) {
enum size = __traits(classInstanceSize, T);
void* mem = malloc(size);
scope(failure) free(mem);
return mem !is null ? emplace!T(mem[0..size], args) : null;
}
void FREE(T)(ref T obj) @nogc if (is(T == class)) {
auto mem = cast(void*) obj;
scope(exit) free(mem);
destroy(obj);
obj = null;
}
extern(C++) class Foo {
~this() @nogc {}
}
void main() {
auto foo = NEW!Foo;
FREE(foo);
}