On 02/25/2011 04:56 PM, bearophile wrote:
> Is this program showing a bug in multiple assignments (DMD 2.052)?
>
>
> void main() {
> int i;
> int[2] x;
> i, x[i] = 1;
I haven't heard about multiple assignments but that's the comma operator
up there, separating (and sequencing) two expressions:
1) i
2) x[i] = 1
> assert(x == [1, 0]); // OK
>
> int j;
> int[2] y;
> y[j], j = 1;
Again, two expressions:
1) y[j]
2) j = 1
Only the second of both cases have an effect.
Ali
> assert(y == [0, 0]); // Not OK
> }
>
>
> At the end of the program I expect y to be [1,0] instead of [0,0].
>
> Yet this C program with GCC:
>
> #include "stdio.h"
> int main() {
> int i = 0;
> int x[2] = {0, 0};
> i, x[i] = 1;
> printf("%d %d\n", x[0], x[1]);
>
> int j = 0;
> int y[2] = {0, 0};
> y[j], j = 1;
> printf("%d %d\n", y[0], y[1]);
>
> return 0;
> }
>
>
> has the same output as DMD:
> 1 0
> 0 0
>
> Bye,
> bearophile
