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import std.stdio;
 
class X
{
    int p_prop;
 
    @property auto x() { return P!(int, "p_prop")(this.p_prop, this); }
 
    struct P(T, string p)
    {
        T v; X c;
        mixin("alias v this;");
 
        ~this()
        {
            mixin("this.c." ~ p ~ " = " ~ this.v.stringof ~ ";");
        }
    }
}
 
void main()
{
    X y = new X();
 
    y.x += 50;
    y.x *= 3;
    writeln(y.p_prop);
}
 

prog.d(25): Error: 'y.x' is not a scalar, it is a P!(int,"p_prop")()
prog.d(25): Error: incompatible types for ((y.x) += (50)): 'P!(int,"p_prop")()' and 'int'
prog.d(26): Error: 'y.x' is not a scalar, it is a P!(int,"p_prop")()
prog.d(26): Error: incompatible types for ((y.x) *= (3)): 'P!(int,"p_prop")()' and 'int'

Standard output is empty