def convert_goal_constraints(goal_constraints, var_map, axiom_map):
goal_literals = []
for con in goal_constraints:
for item in con.values:
assert not isinstance(item, FreeParameter) and (
not isinstance(item, VarMember)
or not any(isinstance(arg, FreeParameter) for arg in item.var))
if con.constraint == Eq:
a, b = con.values
if is_constant(a) and is_constant(b):
if a != b:
return None
elif isinstance(a, VarMember) and isinstance(b, VarMember):
raise NotImplementedError()
elif isinstance(a, VarMember) and is_constant(b):
goal_literals.append(make_equal_predicate(a, b, var_map))
elif is_constant(a) and isinstance(b, VarMember):
goal_literals.append(make_equal_predicate(b, a, var_map))
else:
raise ValueError()
else:
constants = set()
for item in con.values:
if isinstance(item, VarMember):
constants.update(var_args(item.var))
else:
constants.add(item)
goal_literals.append(
get_derived(con, var_map, axiom_map, constants))
return goal_literals
def convert_goal_constraints(goal_constraints, var_map, axiom_map):
# NOTE - could use quantifiers here
# NOTE - any parameters here would have to be the same across effects
goal_literals = []
for con in goal_constraints:
for item in con.values: # TODO - later relax this to handle quantification over goals
assert not isinstance(item, FreeParameter) and (
not isinstance(item, VarMember)
or not any(isinstance(arg, FreeParameter) for arg in item.var))
if con.constraint == Eq:
a, b = con.values
if is_constant(a) and is_constant(b):
if a != b:
return None
elif isinstance(a, VarMember) and isinstance(b, VarMember):
raise NotImplementedError()
elif isinstance(a, VarMember) and is_constant(b):
goal_literals.append(make_equal_predicate(a, b, var_map))
elif is_constant(a) and isinstance(b, VarMember):
goal_literals.append(make_equal_predicate(b, a, var_map))
else:
raise ValueError()
else:
# TODO - could allow constants if a Parameter is used once
constants = set()
for item in con.values:
if isinstance(item, VarMember):
constants.update(var_args(item.var))
else:
constants.add(item)
goal_literals.append(
get_derived(con, var_map, axiom_map, constants))
return goal_literals
def get_static_preconditions(constraints, var_map, internal_params, assign_map,
axiom_map):
static_preconditions = []
for con in constraints:
if con.constraint != Eq and con.constraint not in DUMMY_CONSTRAINTS:
if all(not isinstance(item, VarMember) or item in internal_params
for item in con.values):
values = make_con_constants(con)
static_preconditions.append(
con.constraint.predicate(
*[assign_map.get(item, item) for item in values]))
else:
constants = set()
new_values = []
for item in con.values:
if not isinstance(item,
VarMember) or item in internal_params:
new_values.append(assign_map.get(item, item))
constants.add(assign_map.get(item, item))
else:
constants.update(
assign_map.get(arg, arg)
for arg in var_args(item.var))
new_values.append(
X(*[assign_map.get(arg, arg) for arg in item.var]))
derived = get_derived(con.constraint(*new_values), var_map,
axiom_map, constants)
if derived not in static_preconditions:
static_preconditions.append(derived)
return static_preconditions
def get_constraint_parameters(constraints, use_axioms):
internal_params = set()
for con in constraints:
for item in con.values:
if isinstance(item, VarMember):
for arg in var_args(item.var):
if isinstance(arg, FreeParameter):
internal_params.add(arg)
if item.temp != X or not use_axioms: # No axioms
internal_params.add(item)
elif isinstance(item, FreeParameter):
internal_params.add(item)
return internal_params
def get_single_state(constraints):
state = {}
for con in constraints:
if not con.constraint is Eq:
raise ValueError(
'Initial state must solely be composed of %s constraints: %s' %
(Eq, con))
a, b = con.values
assert isinstance(a, VarMember) and is_constant(b)
assert not any(
isinstance(arg, FreeParameter) for arg in var_args(a.var))
state[a.var] = b
return state
def convert_initial_state(initial_state, var_map, expanded_state_vars):
initial_atoms = []
initial_variables = set()
for con in initial_state:
assert con.constraint == Eq
a, b = con.values
assert isinstance(a, VarMember) and is_constant(b)
assert not any(
isinstance(arg, FreeParameter) for arg in var_args(a.var))
initial_atoms.append(make_equal_predicate(a, b, var_map))
initial_variables.add(a.var)
if initial_variables != expanded_state_vars:
raise ValueError(initial_variables - expanded_state_vars,
expanded_state_vars - initial_variables)
return initial_atoms
def get_static_preconditions(constraints, var_map, internal_params, assign_map,
axiom_map):
# TODO - for a single axiom, if the parameter size of that one is the same as it would be for the operator, then just keep
# NOTE - I could also just keep the equality constraints I suppose...
# TODO - hopefully breaking apart preconditions with several elements won't increase the number of operators
# TODO - if the set of parameters is the same then just keep it here?
static_preconditions = []
for con in constraints:
if con.constraint != Eq and con.constraint not in DUMMY_CONSTRAINTS:
if all(not isinstance(item, VarMember) or item in internal_params
for item in
con.values): # Derived only uses current parameters
values = make_con_constants(con)
static_preconditions.append(
con.constraint.predicate(
*[assign_map.get(item, item) for item in values]))
else:
# TODO - I'm not sure I wrapped all the constants quite right here using make_con_constants
# TODO - what if some of these are constants. It might not make sense to split
constants = set()
new_values = []
for item in con.values:
if not isinstance(item,
VarMember) or item in internal_params:
new_values.append(assign_map.get(item, item))
constants.add(assign_map.get(item, item))
else:
constants.update(
assign_map.get(arg, arg)
for arg in var_args(item.var))
new_values.append(
X(*[assign_map.get(arg, arg) for arg in item.var]))
derived = get_derived(con.constraint(*new_values), var_map,
axiom_map, constants)
if derived not in static_preconditions:
static_preconditions.append(derived)
return static_preconditions
