def _SetToArg(action, suffix, arg_r, out): # type: (SetToArgAction, Optional[str], Reader, _Attributes) -> bool """ Perform the action. """ if suffix: # for the ',' in -d, arg = suffix else: arg_r.Next() arg = arg_r.Peek() if arg is None: e_usage('expected argument to %r' % ('-' + action.name), span_id=arg_r.SpanId()) # e.g. spec.LongFlag('--format', ['text', 'html']) # Should change to arg.Enum([...]) with tagswitch(action.flag_type) as case: if case(flag_type_e.Enum): alts = cast(flag_type__Enum, action.flag_type).alts if arg not in alts: e_usage('got invalid argument %r to %r, expected one of: %s' % (arg, ('-' + action.name), ', '.join(alts)), span_id=arg_r.SpanId()) val = value.Str(arg) # type: value_t elif case(flag_type_e.Str): val = value.Str(arg) elif case(flag_type_e.Int): try: i = int(arg) except ValueError: e_usage('expected integer after %s, got %r' % ('-' + action.name, arg), span_id=arg_r.SpanId()) # So far all our int values are > 0, so use -1 as the 'unset' value if i < 0: e_usage('got invalid integer for %s: %s' % ('-' + action.name, arg), span_id=arg_r.SpanId()) val = value.Int(i) elif case(flag_type_e.Float): try: val = value.Float(float(arg)) except ValueError: e_usage('expected number after %r, got %r' % ('-' + action.name, arg), span_id=arg_r.SpanId()) else: raise AssertionError() out.Set(action.name, val) return action.quit_parsing_flags
def _Value(self, arg, span_id): # type: (str, int) -> value_t try: f = float(arg) except ValueError: e_usage('expected number after %r, got %r' % ('-' + self.name, arg), span_id=span_id) # So far all our float values are > 0, so use -1.0 as the 'unset' value # corner case: this treats -0.0 as 0.0! if f < 0: e_usage('got invalid float for %s: %s' % ('-' + self.name, arg), span_id=span_id) return value.Float(f)
def OnMatch(self, prefix, suffix, arg_r, out): # type: (Optional[str], Optional[str], Reader, _Attributes) -> bool """Called when the flag matches.""" if suffix: # for the ',' in -d, arg = suffix else: arg_r.Next() arg = arg_r.Peek() if arg is None: e_usage('expected argument to %r' % ('-' + self.name), span_id=arg_r.SpanId()) # e.g. spec.LongFlag('--format', ['text', 'html']) # Should change to arg.Enum([...]) with tagswitch(self.flag_type) as case: if case(flag_type_e.Enum): alts = cast(flag_type__Enum, self.flag_type).alts if arg not in alts: e_usage( 'got invalid argument %r to %r, expected one of: %s' % (arg, ('-' + self.name), ', '.join(alts)), span_id=arg_r.SpanId()) val = value.Str(arg) # type: value_t elif case(flag_type_e.Str): val = value.Str(arg) elif case(flag_type_e.Int): try: val = value.Int(int(arg)) except ValueError: e_usage('expected integer after %r, got %r' % ('-' + self.name, arg), span_id=arg_r.SpanId()) elif case(flag_type_e.Float): try: val = value.Float(float(arg)) except ValueError: e_usage('expected number after %r, got %r' % ('-' + self.name, arg), span_id=arg_r.SpanId()) else: raise AssertionError() out.Set(self.name, val) return self.quit_parsing_flags
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 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 _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.Int: default = value.Int(-1) # positive values aren't allowed now elif arg_type == args.Float: default = value.Float(0.0) 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