K addSideCondition(K requires) {
Optional<KApply> sideCondition = state.stream().reduce(BooleanUtils::and);
if (!sideCondition.isPresent()) {
return requires;
} else if (requires.equals(BooleanUtils.TRUE) && sideCondition.isPresent()) {
return sideCondition.get();
} else {
return BooleanUtils.and(requires, sideCondition.get());
}
}
/**
* Adds lookups to the side condition in sorted order in which they must be performed. Lookups are
* sorted based on dependencies between each other, but non-lookup operations appear in no
* particular order with respect to the lookups.
*
* @param requires Previous side condition, if any.
* @return Side condition generated by this compiler pass + previous side condition.
*/
K addSideCondition(K requires) {
Optional<KApply> sideCondition = getSortedLookups().reduce(BooleanUtils::and);
if (!sideCondition.isPresent()) {
return requires;
} else if (requires.equals(BooleanUtils.TRUE) && sideCondition.isPresent()) {
return sideCondition.get();
} else {
// we order lookups before the requires clause so that the fresh constant
// matching side condition remains last. This is necessary in order to
// ensure that fresh constants in rule RHSs are consecutive
return BooleanUtils.and(sideCondition.get(), requires);
}
}