Compile error using synchronized in ldc (but not dmd)

[Nikhil Padmanabhan]

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!

Re: Compile error using synchronized in ldc (but not dmd)

[Nikhil Padmanabhan]

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!