source: CIVL/mods/dev.civl.com/examples/backend/valueat.cvl@ cb4d4f4

#include<collate.cvh>

$gcollator gcollator=$gcollator_create($here, 1);
$collator collator=$collator_create(gcollator, $here, 0);

int main(){
  int i=0;
  $collate_state pre=$collate_arrives(collator, $here);
  
  i++;
  $assert($value_at($collate_get_state(pre), 0, i) != i);
  $collate_departs(collator, pre);
  $free(collator);
  $free(gcollator);
}