Hi!

I just started with D, read already a bit through the documentation but I'm currently stuck here at porting my vector3 class to D:

inline void normalize() {
  *this /= length();
}

How can I achieve that in D? Also: is there a way to overload /=, */ operators?

Thanks for the help!

On Thursday, 20 June 2019 at 11:28:53 UTC, lyan wrote:
> Hi!
>
> I just started with D, read already a bit through the documentation but I'm currently stuck here at porting my vector3 class to D:
>
> inline void normalize() {
>   *this /= length();
> }
>
> How can I achieve that in D? Also: is there a way to overload /=, */ operators?
>
> Thanks for the help!

The code is C++ btw. and I had a typo below, I meant /= and *= operators.

On Thursday, 20 June 2019 at 11:31:19 UTC, lyan wrote:
> On Thursday, 20 June 2019 at 11:28:53 UTC, lyan wrote:
>> Hi!
>>
>> I just started with D, read already a bit through the documentation but I'm currently stuck here at porting my vector3 class to D:
>>
>> inline void normalize() {
>>   *this /= length();
>> }
>>
>> How can I achieve that in D? Also: is there a way to overload /=, */ operators?
>>
>> Thanks for the help!
>
> The code is C++ btw. and I had a typo below, I meant /= and *= operators.

Use `void opOpAssign(string op, T)(auto ref T t);` model to overload "DivAssisng" and "MulAssign". The compiler will instantiate the function template with the right `op` and `T` info when used in the code. These template parameters can be tested in a `static if` expression. See http://ddili.org/ders/d.en/operator_overloading.html for learning D operator overloads.

Note that these kind of questions should go in .learn : https://forum.dlang.org/group/learn

On Thursday, 20 June 2019 at 11:28:53 UTC, lyan wrote:
> Hi!
>
> I just started with D, read already a bit through the documentation but I'm currently stuck here at porting my vector3 class to D:
>
> inline void normalize() {
>   *this /= length();
> }
>
> How can I achieve that in D? Also: is there a way to overload /=, */ operators?
>
> Thanks for the help!

In C++ "this" is a pointer, but in D it's a reference -- so this should work:

this /= length();

BTW the empty () in function calls is optional in D; and see also "UFCS", which Bjarne S. wanted to get into C++ but ISO rejected it.

Yes it's possible to overload operators:

https://dlang.org/spec/operatoroverloading.html#op-assign

Note that these reserved functions to overload operators are templates. Therefore it's possible to generate code for several operators (e.g. + and - or more) with a single template and mixins; as shown in the examples in the link above.

On Thursday, 20 June 2019 at 11:31:19 UTC, lyan wrote:
> On Thursday, 20 June 2019 at 11:28:53 UTC, lyan wrote:
>> Hi!
>>
>> I just started with D, read already a bit through the documentation but I'm currently stuck here at porting my vector3 class to D:
>>
>> inline void normalize() {
>>   *this /= length();
>> }
>>
>> How can I achieve that in D? Also: is there a way to overload /=, */ operators?
>>
>> Thanks for the help!
>
> The code is C++ btw. and I had a typo below, I meant /= and *= operators.

If you're doing the porting to learn then what the others have said will get you there.

If you wan't to just get started with some 3d math there is https://github.com/d-gamedev-team/gfm (under math/gfm/math). Also useful to see what tricks they do to implement the features.

It you're new I can't recommend http://ddili.org/ders/d.en/index.html enough.

In future please post such questions to the learn forum.

Thanks, those are very useful links.

@nogc Vector opUnary(string op)() pure const nothrow
  if (op == "+" || op == "-" || op == "~" || op == "!")
{
   Vector res = void;
   mixin(generateLoopCode!("res.v[@] = " ~ op ~ " v[@];", N)());
   return res;
}

wow...