alias Vec4f = TVector!(float,4);
alias Vec3f = TVector!(float,3);

class TVector(T,int n)
{
	T[n] val;
...

TVector as class does work as expected, as a struct i get the following errors, but why?

struct Vector.TVector!(float, 4).TVector no size yet for forward reference
struct Vector.TVector!(float, 3).TVector no size yet for forward reference

On Tuesday, 5 August 2014 at 18:36:35 UTC, ddos wrote:
> alias Vec4f = TVector!(float,4);
> alias Vec3f = TVector!(float,3);
>
> class TVector(T,int n)
> {
> 	T[n] val;
> ...
>
> TVector as class does work as expected, as a struct i get the following errors, but why?
>
> struct Vector.TVector!(float, 4).TVector no size yet for forward reference
> struct Vector.TVector!(float, 3).TVector no size yet for forward reference

Can you show the complete code? I cannot reproduce this with either latest DMD git, DMD 2.065, or LDC 0.13.0:

    alias Vec4f = TVector!(float,4);
    alias Vec3f = TVector!(float,3);

    struct TVector(T,int n)
    {
        T[n] val;
    }

    Vec3f a;
    Vec4f b;

Am 05.08.2014 21:13, schrieb "Marc Schütz" <schuetzm@gmx.net>":
> On Tuesday, 5 August 2014 at 18:36:35 UTC, ddos wrote:
>> alias Vec4f = TVector!(float,4);
>> alias Vec3f = TVector!(float,3);
>>
>> class TVector(T,int n)
>> {
>>     T[n] val;
>> ...
>>
>> TVector as class does work as expected, as a struct i get the
>> following errors, but why?
>>
>> struct Vector.TVector!(float, 4).TVector no size yet for forward
>> reference
>> struct Vector.TVector!(float, 3).TVector no size yet for forward
>> reference
>
> Can you show the complete code? I cannot reproduce this with either
> latest DMD git, DMD 2.065, or LDC 0.13.0:
>
>      alias Vec4f = TVector!(float,4);
>      alias Vec3f = TVector!(float,3);
>
>      struct TVector(T,int n)
>      {
>          T[n] val;
>      }
>
>      Vec3f a;
>      Vec4f b;

struct vs class?

On Tuesday, 5 August 2014 at 19:13:31 UTC, Marc Schütz wrote:
> On Tuesday, 5 August 2014 at 18:36:35 UTC, ddos wrote:
>> alias Vec4f = TVector!(float,4);
>> alias Vec3f = TVector!(float,3);
>>
>> class TVector(T,int n)
>> {
>> 	T[n] val;
>> ...
>>
>> TVector as class does work as expected, as a struct i get the following errors, but why?
>>
>> struct Vector.TVector!(float, 4).TVector no size yet for forward reference
>> struct Vector.TVector!(float, 3).TVector no size yet for forward reference
>
> Can you show the complete code? I cannot reproduce this with either latest DMD git, DMD 2.065, or LDC 0.13.0:
>
>     alias Vec4f = TVector!(float,4);
>     alias Vec3f = TVector!(float,3);
>
>     struct TVector(T,int n)
>     {
>         T[n] val;
>     }
>
>     Vec3f a;
>     Vec4f b;

http://pastebin.com/34sbffSa
thx for your help :) !
i use DMD 2.065 btw

> http://pastebin.com/34sbffSa

Your problem comes from lengthSquared:

public auto lengthSquared = function () => val.reduce!((a,b) => a + b*b);

That's an unusual way to define a method. Any reason why you are using a pointer to a function as a member? Do you need to be able to redefine it at runtime?

I guess that in this case, the compiler cannot determine its return
type and/or its size?
I'd use:

public auto lengthSquared () { return val.reduce!((a,b) => a + b*b);}

i wasn't intentionally creating a functionpointer, i just liked the syntax x3 ... but i guess i should read into it now :)
thx for you help !

On Tuesday, 5 August 2014 at 19:51:33 UTC, Philippe Sigaud via Digitalmars-d-learn wrote:
>> http://pastebin.com/34sbffSa
>
> Your problem comes from lengthSquared:
>
> public auto lengthSquared = function () => val.reduce!((a,b) => a + b*b);
>
> That's an unusual way to define a method. Any reason why you are using
> a pointer to a function as a member? Do you need to be able to
> redefine it at runtime?
>
> I guess that in this case, the compiler cannot determine its return
> type and/or its size?
> I'd use:
>
> public auto lengthSquared () { return val.reduce!((a,b) => a + b*b);}