Hello,

The following code snippet fails to compile on ldc2 (0.12.1), but successfully compiles on dmd 2.064.2 :

struct Particle {
	double x,y,z,w,x2;
	this(double[] arr) {
		x = arr[0]; y = arr[1]; z=arr[2]; w=arr[3];
		x2 = x*x + y*y + z*z;
	}
}

synchronized class SyncArray {
	private Particle[] buf;

	void push(Particle[] arr1) {
		buf.length = arr1.length;
		buf[] = arr1[];
	}

	Particle[] pop() {
		auto _tmp = new Particle[buf.length];
		_tmp[] = buf[];
		buf = null;
		return _tmp;
	}
}

The error message in ldc2 :
test.d(14): Error: cannot implicitly convert expression (arr1[]) of type Particle[] to const(shared(Particle)[])
test.d(19): Error: cannot implicitly convert expression (this.buf[]) of type shared(Particle)[] to const(Particle[])

What am I doing wrong here?

Thanks in advance!
-- Nikhil

P.S. I've been enjoying coding in D a lot -- many thanks to the entire D community!

Just a quick follow-up : replacing the array operation by a foreach works around this issue, but I don't understand why it failed in the first place.


On Monday, 9 December 2013 at 04:26:01 UTC, Nikhil Padmanabhan wrote:
> Hello,
>
> The following code snippet fails to compile on ldc2 (0.12.1), but successfully compiles on dmd 2.064.2 :
>
> struct Particle {
> 	double x,y,z,w,x2;
> 	this(double[] arr) {
> 		x = arr[0]; y = arr[1]; z=arr[2]; w=arr[3];
> 		x2 = x*x + y*y + z*z;
> 	}
> }
>
> synchronized class SyncArray {
> 	private Particle[] buf;
>
> 	void push(Particle[] arr1) {
> 		buf.length = arr1.length;
> 		buf[] = arr1[];
> 	}
>
> 	Particle[] pop() {
> 		auto _tmp = new Particle[buf.length];
> 		_tmp[] = buf[];
> 		buf = null;
> 		return _tmp;
> 	}
> }
>
> The error message in ldc2 :
> test.d(14): Error: cannot implicitly convert expression (arr1[]) of type Particle[] to const(shared(Particle)[])
> test.d(19): Error: cannot implicitly convert expression (this.buf[]) of type shared(Particle)[] to const(Particle[])
>
> What am I doing wrong here?
>
> Thanks in advance!
> -- Nikhil
>
> P.S. I've been enjoying coding in D a lot -- many thanks to the entire D community!