struct Pointer(uint p, T) if(p <= Generic)
{
T* ptr;
ref T opUnary(string op)() if(op=="*")
{
return *ptr;
}
ref T opIndex(size_t i)
{
return *(ptr+i);
}
auto opBinary(string op)(ptrdiff_t i) if(op == "+" || op ==
"-")
{
return Pointer!(p, T) (mixin("ptr" ~ op ~ "i"));
}
auto opOpAssign(string op)(ptrdiff_t i) if(op =="+=" || op ==
"-=")
{
//mixin("ptr"~op~"i;");
ptr += i;
}
}
void main()
{
int a = void;
alias fooint = Pointer!(2,int);
auto b = fooint(&a);
auto c = *b;
*b = 42;
b[0] = 7;
auto e = b + 5;
auto f = b - 4;
auto g = &a;
g += 3;
b += 7;
b -= 9;
}
errors with
pointer.d(23): Error: 'b += 7' is not a scalar, it is a
Pointer!(2u, int)
pointer.d(24): Error: 'b -= 9' is not a scalar, it is a
Pointer!(2u, int)
irrespective of the presence or absence of the opOpAssign method
or its definition.
surely this should work. What am I doing wrong?
