def is_true(w_obj):
# a bit of duplication of the logic from DescrOperation.is_true...
# first try 'nonzero'
try:
w_res = nonzero_shortcut(space, w_obj)
except FailedToImplement:
pass
else:
# the __nonzero__ method of built-in objects should
# always directly return a Bool
assert isinstance(w_res, W_BoolObject)
return w_res.boolval
# then try 'len'
try:
w_res = len_shortcut(space, w_obj)
except FailedToImplement:
pass
else:
# the __len__ method of built-in objects typically
# returns an unwrappable integer
try:
return space.int_w(w_res) != 0
except OperationError:
# I think no OperationError other than w_OverflowError
# could occur here
w_obj = w_res
# general case fallback
return DescrOperation.is_true(space, w_obj)
def is_true(self, w_obj):
# first a few shortcuts for performance
if type(w_obj) is W_BoolObject:
return w_obj.boolval
if w_obj is self.w_None:
return False
# then a shortcut for bootstrapping reasons
if type(w_obj) is self.DictObjectCls:
return w_obj.len() != 0
else:
return DescrOperation.is_true(self, w_obj)
def is_true(w_obj):
# a bit of duplication of the logic from DescrOperation.is_true...
try:
w_res = shortcut(space, w_obj)
except FailedToImplement:
pass
else:
# the __nonzero__ method of built-in objects should
# always directly return a Bool; however, the __len__ method
# of built-in objects typically returns an unwrappable integer
if isinstance(w_res, W_BoolObject):
return w_res.boolval
try:
return space.int_w(w_res) != 0
except OperationError:
# I think no OperationError other than w_OverflowError
# could occur here
w_obj = w_res
# general case fallback
return DescrOperation.is_true(space, w_obj)
def is_true(self, w_obj):
# a shortcut for performance
# NOTE! this method is typically overridden by builtinshortcut.py.
if type(w_obj) is W_BoolObject:
return w_obj.boolval
return DescrOperation.is_true(self, w_obj)
def is_true(self, w_obj):
# a shortcut for performance
# NOTE! this method is typically overridden by builtinshortcut.py.
if type(w_obj) is W_BoolObject:
return w_obj.boolval
return DescrOperation.is_true(self, w_obj)