stuck on opDiv / opBinary
Spacen Jasset via Digitalmars-d-learn
digitalmars-d-learn at puremagic.com
Sun Aug 30 16:09:33 PDT 2015
On Sunday, 30 August 2015 at 20:09:25 UTC, Timon Gehr wrote:
> On 08/30/2015 07:02 PM, Spacen Jasset wrote:
>> [...]
>
> import std.math: sqrt;
> import std.algorithm: map,sum,canFind;
>
> struct Vector3{
> float[3] xyz;
> void normalise(){ this/=magnitude(); }
> float magnitude(){ return sqrt(xyz[].map!(a=>a*a).sum); }
> enum scalarOps=["*","/"];
> enum isScalarOp(string op)=scalarOps.canFind(op);
> void scalar(string op)(float scalar)if(isScalarOp!op){
> foreach(ref a;xyz) mixin(`a `~op~`=scalar;`);
> }
> Vector3 opBinary(string op)(float scalar)if(isScalarOp!op){
> Vector3 v=this;
> v.scalar!op(scalar);
> return v;
> }
> auto opOpAssign(string op)(float rhs)if(isScalarOp!op){
> return mixin(`this=this `~op~` rhs`);
> }
> }
Thanks, that is interesting. I am curently porting, rather than
trying to rewrite anything at the moment, but I will try this out
later.
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