def recurse(condition):
if isinstance(condition, pddl.FunctionComparison) :
parts = [task.function_administrator.get_derived_function(exp) for exp in condition.parts]
if condition.negated:
return pddl.NegatedFunctionComparison(condition.comparator,parts)
else:
return pddl.FunctionComparison(condition.comparator,parts)
else:
new_parts = [recurse(part) for part in condition.parts]
return condition.change_parts(new_parts)
def parse_condition_aux(alist, negated, type_dict, predicate_dict):
"""Parse a PDDL condition. The condition is translated into NNF on the fly."""
# if DEBUG: print ("parsing condition aux %s" % [alist])
tag = alist[0]
if is_function_comparison(
alist
): # NFD conditions are always comparisons between 2 numeric expressions
args = [parse_expression(arg) for arg in alist[1:]]
assert len(args) == 2, args
if negated:
return pddl.NegatedFunctionComparison(tag, args, True)
else:
return pddl.FunctionComparison(tag, args, True)
elif tag in ("and", "or", "not", "imply"):
args = alist[1:]
if tag == "imply":
assert len(args) == 2
if tag == "not":
assert len(args) == 1
return parse_condition_aux(args[0], not negated, type_dict,
predicate_dict)
elif tag in ("forall", "exists"):
parameters = parse_typed_list(alist[1])
args = alist[2:]
assert len(args) == 1
else:
# if is_object_comparison(alist):
# print("DEBUG: Object comparison!")
# print(alist)
return parse_literal(alist, type_dict, predicate_dict, negated=negated)
if tag == "imply":
parts = [
parse_condition_aux(args[0], not negated, type_dict,
predicate_dict),
parse_condition_aux(args[1], negated, type_dict, predicate_dict)
]
tag = "or"
else:
parts = [
parse_condition_aux(part, negated, type_dict, predicate_dict)
for part in args
]
if tag == "and" and not negated or tag == "or" and negated:
return pddl.Conjunction(parts)
elif tag == "or" and not negated or tag == "and" and negated:
return pddl.Disjunction(parts)
elif tag == "forall" and not negated or tag == "exists" and negated:
return pddl.UniversalCondition(parameters, parts)
elif tag == "exists" and not negated or tag == "forall" and negated:
return pddl.ExistentialCondition(parameters, parts)
def recurse(condition, act, time, duration, pnes):
if isinstance(condition, pddl.FunctionComparison):
parts = [
exp.remove_duration_variable(act, time, duration, pnes)
for exp in condition.parts
]
return pddl.FunctionComparison(condition.comparator, parts)
return comp
else:
new_parts = [
recurse(part, act, time, duration, pnes)
for part in condition.parts
]
return condition.change_parts(new_parts)
