Hi there. I'm converting some old C code to D, but I'm stumbling on this:

...

alias GLdouble Scalar;

...

class Vector {
	private Scalar[4] data;

	...

	Vector opMult(Scalar s) {

	...

	}

	Vector opDiv(Scalar s) {

		return this * (1.0 / s); // Doesn't work

		//return this.opMult(1.0 / s); Works as I expected
	}

	...

}

I am trying to overload the division operator, but I can't use the multiplication operator I just overloaded(or at least thought I did). The compiler says

vector.d(112): incompatible types for ((this) * (1 / cast(double)(s))): \
'bagle.math.vector.Vector' and 'double'

vector.d(112): 'this' is not an arithmetic type

and refuses to compile the code. The commented out line works fine. Why is this? I thought this.opMult(s) and this * s were synonymous?

I suppose I'm missing something, but from just reading the spec I couldn't figure it out.

Thanks
/Anders

it's opMul not opMult

Anders Runesson wrote:
> Hi there. I'm converting some old C code to D, but I'm stumbling on this:
> 
> ...
> 
> alias GLdouble Scalar;
> 
> ...
> 
> class Vector {
> 	private Scalar[4] data;
> 
> 	...
> 
> 	Vector opMult(Scalar s) {
> 	
> 	...			
> 	
> 	}
> 	
> 	Vector opDiv(Scalar s) {
> 		
> 		return this * (1.0 / s); // Doesn't work
> 		
> 		//return this.opMult(1.0 / s); Works as I expected
> 	}
> 
> 	...
> 
> }
> 
> I am trying to overload the division operator, but I can't use the
> multiplication operator I just overloaded(or at least thought I did).
> The compiler says 
> 
> vector.d(112): incompatible types for ((this) * (1 / cast(double)(s))): \
> 'bagle.math.vector.Vector' and 'double'
> 
> vector.d(112): 'this' is not an arithmetic type
> 
> and refuses to compile the code. The commented out line works fine.
> Why is this? I thought this.opMult(s) and this * s were synonymous?
> 
> I suppose I'm missing something, but from just reading the spec I couldn't
> figure it out.
> 
> Thanks
> /Anders
> 
> 

Oh, man do I feel stupid now... :)

Thanks a lot
/Anders

Den Mon, 08 May 2006 08:58:31 -0600 skrev Hasan Aljudy:

> it's opMul not opMult
> 
> Anders Runesson wrote:
>> Hi there. I'm converting some old C code to D, but I'm stumbling on this:
>> 
>> ...
>> 
>> alias GLdouble Scalar;
>> 
>> ...
>> 
>> class Vector {
>> 	private Scalar[4] data;
>> 
>> 	...
>> 
>> 	Vector opMult(Scalar s) {
>> 
>> 	...
>> 
>> 	}
>> 
>> 	Vector opDiv(Scalar s) {
>> 
>> 		return this * (1.0 / s); // Doesn't work
>> 
>> 		//return this.opMult(1.0 / s); Works as I expected
>> 	}
>> 
>> 	...
>> 
>> }
>> 
>> I am trying to overload the division operator, but I can't use the multiplication operator I just overloaded(or at least thought I did). The compiler says
>> 
>> vector.d(112): incompatible types for ((this) * (1 / cast(double)(s))): \
>> 'bagle.math.vector.Vector' and 'double'
>> 
>> vector.d(112): 'this' is not an arithmetic type
>> 
>> and refuses to compile the code. The commented out line works fine. Why is this? I thought this.opMult(s) and this * s were synonymous?
>> 
>> I suppose I'm missing something, but from just reading the spec I couldn't figure it out.
>> 
>> Thanks
>> /Anders
>> 
>>