import core.memory;

import std.experimental.allocator.mallocator;

import core.lifetime;

​

class Bar{

}

​

struct Foo{

    Bar bar;

​

    this(Bar bar){

        this.bar = bar;

    }

}

​

​

void main(){

    void[] buffer = Mallocator.instance.allocate(Foo.sizeof * 10);

    scope(exit){

        GC.removeRange(buffer.ptr);

        Mallocator.instance.deallocate(buffer);

    }

​

    GC.addRange(buffer.ptr, Foo.sizeof);

    emplace(cast(Foo*)buffer.ptr, new Bar);

    GC.addRange(buffer.ptr, Foo.sizeof*2);      //Overlaps previous range, is it OK?

    emplace(cast(Foo*)(buffer.ptr + Foo.sizeof), new Bar);

}

​