def fill(self, argument, convert_to_ast=False, call_my_args=True):
""" Try to fill this argument slot with the given argument. Return
a ConstantArg containing the result. If there is a type problem,
raise a TATypeError. """
if isinstance(argument, ast.AST):
convert_to_ast = True
# 1. can the argument be called?
(func_disjunction, args) = (None, [])
if (isinstance(argument, tuple) and argument
and callable(argument[0])):
func_disjunction = argument[0]
if len(argument) >= 2 and isinstance(argument[1], LogoCode):
args = argument[2:]
else:
args = argument[1:]
elif callable(argument):
func_disjunction = argument
# make sure we can loop over func_disjunction
if not isinstance(func_disjunction, PrimitiveDisjunction):
func_disjunction = PrimitiveDisjunction((func_disjunction, ))
error = None
bad_value = argument # the value that caused the TATypeError
for func in func_disjunction:
error = None
for slot in self.get_alternatives():
if isinstance(slot.wrapper, PrimitiveDisjunction):
wrapper_disjunction = slot.wrapper
else:
wrapper_disjunction = PrimitiveDisjunction((slot.wrapper,))
for wrapper in wrapper_disjunction:
# check if the argument can fill this slot (type-wise)
# (lambda functions are always accepted)
if getattr(func, '__name__', None) == '<lambda>':
converter = identity
old_type = TYPE_OBJECT
new_type = slot.type
else:
if wrapper is not None:
arg_types = get_type(wrapper)[0]
bad_value = wrapper
elif func is not None:
arg_types = get_type(func)[0]
bad_value = func
else:
arg_types = get_type(argument)[0]
bad_value = argument
converter = None
if not isinstance(arg_types, TypeDisjunction):
arg_types = TypeDisjunction((arg_types, ))
if isinstance(slot.type, TypeDisjunction):
slot_types = slot.type
else:
slot_types = TypeDisjunction((slot.type, ))
for old_type in arg_types:
for new_type in slot_types:
converter = get_converter(old_type, new_type)
if converter is not None:
break
if converter is not None:
break
# unable to convert, try next wrapper/ slot/ func
if converter is None:
continue
# 1. (cont'd) call the argument or pass it on as a callable
called_argument = argument
if func is not None:
func_prim = func
if not isinstance(func_prim, Primitive):
func_prim = Primitive(
func_prim,
[ArgSlot(TYPE_OBJECT)] * len(args))
try:
func_prim = func_prim.fill_slots(
args,
convert_to_ast=convert_to_ast,
call_my_args=(slot.call_arg and call_my_args))
except TATypeError as error:
if Primitive._DEBUG:
traceback.print_exc()
# on failure, try next wrapper/ slot/ func
bad_value = error.bad_value
continue
if convert_to_ast:
called_argument = func_prim.get_ast()
else:
if slot.call_arg and call_my_args:
# call and pass on the return value
called_argument = func_prim()
else:
# don't call and pass on the callable
called_argument = func_prim
# 2. apply any wrappers
wrapped_argument = called_argument
if wrapper is not None:
if convert_to_ast:
if not hasattr(wrapper, "get_ast"):
raise PyExportError(
("cannot convert callable"
" %s to an AST") % (repr(wrapper)))
wrapped_argument = wrapper.get_ast(
called_argument)
else:
if slot.call_arg and call_my_args:
wrapped_argument = wrapper(called_argument)
else:
wrapped_argument = wrapper.fill_slots(
[called_argument], call_my_args=False)
# last chance to convert raw values to ASTs
# (but not lists of ASTs)
if (convert_to_ast and
not isinstance(wrapped_argument, ast.AST) and
not (isinstance(wrapped_argument, list) and
wrapped_argument and
isinstance(wrapped_argument[0], ast.AST))):
wrapped_argument = value_to_ast(wrapped_argument)
# 3. check the type and convert the argument if necessary
converted_argument = wrapped_argument
if slot.call_arg and call_my_args:
try:
converted_argument = convert(
wrapped_argument,
new_type, old_type=old_type,
converter=converter)
except TATypeError as error:
if Primitive._DEBUG:
traceback.print_exc()
# on failure, try next wrapper/ slot/ func
bad_value = wrapped_argument
continue
elif converter != identity:
converted_argument = Primitive(
converter,
return_type=new_type,
arg_descs=[ConstantArg(wrapped_argument,
value_type=old_type,
call_arg=False)])
# on success, return the result
return ConstantArg(
converted_argument,
value_type=new_type,
call_arg=(slot.call_arg and call_my_args))
# if we haven't returned anything yet, then all alternatives failed
if error is not None:
raise error
else:
raise TATypeError(bad_value=bad_value, bad_type=old_type,
req_type=new_type)
def fill(self, argument, convert_to_ast=False, call_my_args=True):
""" Try to fill this argument slot with the given argument. Return
a ConstantArg containing the result. If there is a type problem,
raise a TATypeError. """
if isinstance(argument, ast.AST):
convert_to_ast = True
# 1. can the argument be called?
(func_disjunction, args) = (None, [])
if (isinstance(argument, tuple) and argument
and callable(argument[0])):
func_disjunction = argument[0]
if len(argument) >= 2 and isinstance(argument[1], LogoCode):
args = argument[2:]
else:
args = argument[1:]
elif callable(argument):
func_disjunction = argument
# make sure we can loop over func_disjunction
if not isinstance(func_disjunction, PrimitiveDisjunction):
func_disjunction = PrimitiveDisjunction((func_disjunction, ))
error = None
bad_value = argument # the value that caused the TATypeError
for func in func_disjunction:
error = None
for slot in self.get_alternatives():
if isinstance(slot.wrapper, PrimitiveDisjunction):
wrapper_disjunction = slot.wrapper
else:
wrapper_disjunction = PrimitiveDisjunction((slot.wrapper,))
for wrapper in wrapper_disjunction:
# check if the argument can fill this slot (type-wise)
# (lambda functions are always accepted)
if getattr(func, '__name__', None) == '<lambda>':
converter = identity
old_type = TYPE_OBJECT
new_type = slot.type
else:
if wrapper is not None:
arg_types = get_type(wrapper)[0]
bad_value = wrapper
elif func is not None:
arg_types = get_type(func)[0]
bad_value = func
else:
arg_types = get_type(argument)[0]
bad_value = argument
converter = None
if not isinstance(arg_types, TypeDisjunction):
arg_types = TypeDisjunction((arg_types, ))
if isinstance(slot.type, TypeDisjunction):
slot_types = slot.type
else:
slot_types = TypeDisjunction((slot.type, ))
for old_type in arg_types:
for new_type in slot_types:
converter = get_converter(old_type, new_type)
if converter is not None:
break
if converter is not None:
break
# unable to convert, try next wrapper/ slot/ func
if converter is None:
continue
# 1. (cont'd) call the argument or pass it on as a callable
called_argument = argument
if func is not None:
func_prim = func
if not isinstance(func_prim, Primitive):
func_prim = Primitive(
func_prim,
[ArgSlot(TYPE_OBJECT)] * len(args))
try:
func_prim = func_prim.fill_slots(
args,
convert_to_ast=convert_to_ast,
call_my_args=(slot.call_arg and call_my_args))
except TATypeError as error:
if Primitive._DEBUG:
traceback.print_exc()
# on failure, try next wrapper/ slot/ func
bad_value = error.bad_value
continue
if convert_to_ast:
called_argument = func_prim.get_ast()
else:
if slot.call_arg and call_my_args:
# call and pass on the return value
called_argument = func_prim()
else:
# don't call and pass on the callable
called_argument = func_prim
# 2. apply any wrappers
wrapped_argument = called_argument
if wrapper is not None:
if convert_to_ast:
if not hasattr(wrapper, "get_ast"):
raise PyExportError(
("cannot convert callable"
" %s to an AST") % (repr(wrapper)))
wrapped_argument = wrapper.get_ast(
called_argument)
else:
if slot.call_arg and call_my_args:
wrapped_argument = wrapper(called_argument)
else:
wrapped_argument = wrapper.fill_slots(
[called_argument], call_my_args=False)
# last chance to convert raw values to ASTs
# (but not lists of ASTs)
if (convert_to_ast and
not isinstance(wrapped_argument, ast.AST) and
not (isinstance(wrapped_argument, list) and
wrapped_argument and
isinstance(wrapped_argument[0], ast.AST))):
wrapped_argument = value_to_ast(wrapped_argument)
# 3. check the type and convert the argument if necessary
converted_argument = wrapped_argument
if slot.call_arg and call_my_args:
try:
converted_argument = convert(
wrapped_argument,
new_type, old_type=old_type,
converter=converter)
except TATypeError as error:
if Primitive._DEBUG:
traceback.print_exc()
# on failure, try next wrapper/ slot/ func
bad_value = wrapped_argument
continue
elif converter != identity:
converted_argument = Primitive(
converter,
return_type=new_type,
arg_descs=[ConstantArg(wrapped_argument,
value_type=old_type,
call_arg=False)])
# on success, return the result
return ConstantArg(
converted_argument,
value_type=new_type,
call_arg=(slot.call_arg and call_my_args))
# if we haven't returned anything yet, then all alternatives failed
if error is not None:
raise error
else:
raise TATypeError(bad_value=bad_value, bad_type=old_type,
req_type=new_type)