| # Copyright 2018 The Bazel Authors. All rights reserved. |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| """Skylib module containing functions checking types.""" |
| |
| # create instance singletons to avoid unnecessary allocations |
| _a_bool_type = type(True) |
| _a_dict_type = type({}) |
| _a_list_type = type([]) |
| _a_string_type = type("") |
| _a_tuple_type = type(()) |
| _an_int_type = type(1) |
| _a_depset_type = type(depset()) |
| |
| def _a_function(): |
| pass |
| |
| _a_function_type = type(_a_function) |
| |
| def _is_list(v): |
| """Returns True if v is an instance of a list. |
| |
| Args: |
| v: The value whose type should be checked. |
| |
| Returns: |
| True if v is an instance of a list, False otherwise. |
| """ |
| return type(v) == _a_list_type |
| |
| def _is_string(v): |
| """Returns True if v is an instance of a string. |
| |
| Args: |
| v: The value whose type should be checked. |
| |
| Returns: |
| True if v is an instance of a string, False otherwise. |
| """ |
| return type(v) == _a_string_type |
| |
| def _is_bool(v): |
| """Returns True if v is an instance of a bool. |
| |
| Args: |
| v: The value whose type should be checked. |
| |
| Returns: |
| True if v is an instance of a bool, False otherwise. |
| """ |
| return type(v) == _a_bool_type |
| |
| def _is_none(v): |
| """Returns True if v has the type of None. |
| |
| Args: |
| v: The value whose type should be checked. |
| |
| Returns: |
| True if v is None, False otherwise. |
| """ |
| return type(v) == type(None) |
| |
| def _is_int(v): |
| """Returns True if v is an instance of a signed integer. |
| |
| Args: |
| v: The value whose type should be checked. |
| |
| Returns: |
| True if v is an instance of a signed integer, False otherwise. |
| """ |
| return type(v) == _an_int_type |
| |
| def _is_tuple(v): |
| """Returns True if v is an instance of a tuple. |
| |
| Args: |
| v: The value whose type should be checked. |
| |
| Returns: |
| True if v is an instance of a tuple, False otherwise. |
| """ |
| return type(v) == _a_tuple_type |
| |
| def _is_dict(v): |
| """Returns True if v is an instance of a dict. |
| |
| Args: |
| v: The value whose type should be checked. |
| |
| Returns: |
| True if v is an instance of a dict, False otherwise. |
| """ |
| return type(v) == _a_dict_type |
| |
| def _is_function(v): |
| """Returns True if v is an instance of a function. |
| |
| Args: |
| v: The value whose type should be checked. |
| |
| Returns: |
| True if v is an instance of a function, False otherwise. |
| """ |
| return type(v) == _a_function_type |
| |
| def _is_depset(v): |
| """Returns True if v is an instance of a `depset`. |
| |
| Args: |
| v: The value whose type should be checked. |
| |
| Returns: |
| True if v is an instance of a `depset`, False otherwise. |
| """ |
| return type(v) == _a_depset_type |
| |
| types = struct( |
| is_list = _is_list, |
| is_string = _is_string, |
| is_bool = _is_bool, |
| is_none = _is_none, |
| is_int = _is_int, |
| is_tuple = _is_tuple, |
| is_dict = _is_dict, |
| is_function = _is_function, |
| is_depset = _is_depset, |
| ) |