Feature request : simplifying intents in forall loops (and friends)

[npadmana]

I often find myself doing multiple reductions of the same type in forall loops (eg. multiple accumulators). The way I currently do this is to specify separate reduce intents (as in the commented line in the code below....)

  (+ reduce sum1, + reduce sum2)

While this works fine, it would be nice to write this as

  (+ reduce sum1,sum2)

or something like that (with a different delimiter, for instance). This could be extended to all intents (suggested by @nspark), instead of just reduce intents.

@bradcray suggested using tuples for this

  (in (x,y), + reduce (sum1, sum2))

I'll note that OpenMP allows specifying such common reductions over a list of variables.

This was discussed in chapel-users here.

A possible future ---

var sum1, sum2 = 0;

config const N=100000;

forall ii in 1..N with (+ reduce (sum1,sum2)) {
  sum1 += ii;
  sum2 += ii*ii;
}

writeln(sum1);
writeln(sum2);