Re: Using memberspaces for a property-like syntax and more

[TommiT]

On Saturday, 2 February 2013 at 21:21:28 UTC, Rob T wrote:

Rather than feel exactly like C++ namespaces, I am wondering if we could define a memberspace as a type so that can be reused multiple times in various areas of an application. With templates, a memberspace can be transformed in various ways to work with different data types.

--rt

I think we can use template mixins to achieve that:

mixin template add_stuff(alias var)
{
    memberspace stuff
    {
        typeof(var) opCall() const
        {
            return var;
        }

        void opAssign(typeof(var) rhs)
        {
            var = rhs;
        }
    }
}

struct S
{
    int _value;

    mixin add_stuff!(_value);
}

void main()
{
    S s;
    s.stuff = 42;
    assert(s.stuff() == 42);
}