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

[TommiT]

On Saturday, 2 February 2013 at 21:39:45 UTC, TommiT wrote:
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);
}

And here's how you could even add the name of your memberspace as 
one of the template mixin parameters:

mixin template basic_property(alias prop, alias var)
{
    memberspace prop
    {
        typeof(var) opCall() const
        {
            return var;
        }

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

struct S
{
    int _value;

    memberspace myprop { }

    mixin basic_property!(myprop, _value);
}

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