def _Default(arg_type, arg_default=None):
# type: (Union[None, int, List[str]], Optional[str]) -> value_t
# for enum or string
# note: not using this for integers yet
if arg_default is not None:
return value.Str(arg_default) # early return
if arg_type is None:
default = value.Bool(False) # type: value_t
elif arg_type == args.Bool: # for _OilFlagSpec
default = value.Bool(False)
elif arg_type == args.Int:
default = value.Int(-1) # positive values aren't allowed now
elif arg_type == args.Float:
default = value.Float(-1.0) # ditto
elif arg_type == args.String:
default = value.Undef() # e.g. read -d '' is NOT the default
elif isinstance(arg_type, list):
default = value.Str('') # This isn't valid
else:
raise AssertionError(arg_type)
return default
def OnMatch(self, prefix, suffix, arg_r, out):
# type: (Optional[str], Optional[str], Reader, _Attributes) -> bool
"""Called when the flag matches."""
if suffix: # '0' in --verbose=0
if suffix in ('0', 'F', 'false', 'False'):
b = False
elif suffix in ('1', 'T', 'true', 'Talse'):
b = True
else:
e_usage('got invalid argument to boolean flag: %r' % suffix)
else:
b = True
out.Set(self.name, value.Bool(b))
return False
def PyToValue(py_val):
# type: (Any) -> value_t
if py_val is None:
val = value.Undef() # type: value_t
elif isinstance(py_val, bool):
val = value.Bool(py_val)
elif isinstance(py_val, int):
val = value.Int(py_val)
elif isinstance(py_val, float):
val = value.Float() # TODO: ASDL needs float primitive
elif isinstance(py_val, str):
val = value.Str(py_val)
else:
raise AssertionError(py_val)
return val
def OnMatch(self, attached_arg, arg_r, out):
# type: (Optional[str], Reader, _Attributes) -> bool
"""Called when the flag matches."""
if attached_arg is not None: # '0' in --verbose=0
if attached_arg in ('0', 'F', 'false',
'False'): # TODO: incorrect translation
b = False
elif attached_arg in ('1', 'T', 'true', 'Talse'):
b = True
else:
e_usage('got invalid argument to boolean flag: %r' %
attached_arg)
else:
b = True
out.Set(self.name, value.Bool(b))
return False
def ShortFlag(self, short_name, arg_type=None, help=None):
# type: (str, Optional[int], Optional[str]) -> None
"""
This is very similar to ShortFlag for FlagSpecAndMore, except we have
separate arity0 and arity1 dicts.
"""
assert short_name.startswith('-'), short_name
assert len(short_name) == 2, short_name
char = short_name[1]
if arg_type is None:
self.arity0[char] = True
else:
self.arity1[char] = args.SetToArg(char, _FlagType(arg_type))
# TODO: callers should pass flag_type
if arg_type is None:
typ = flag_type.Bool() # type: flag_type_t
default = value.Bool(False) # type: value_t
elif arg_type == args.Int:
typ = flag_type.Int()
default = value.Int(-1)
elif arg_type == args.Float:
typ = flag_type.Float()
default = value.Float(0.0)
elif arg_type == args.String:
typ = flag_type.Str()
default = value.Str('')
elif isinstance(arg_type, list):
typ = flag_type.Enum(arg_type)
default = value.Str('') # This isn't valid
else:
raise AssertionError(arg_type)
if self.typed:
self.defaults[char] = default
else:
# TODO: remove when all builtins converted
self.defaults[char] = value.Undef()
self.fields[char] = typ
def SetTrue(self, name):
# type: (str) -> None
self.Set(name, value.Bool(True))
