153 lines
3.7 KiB
Python
153 lines
3.7 KiB
Python
# 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())
|
|
_a_struct_type = type(struct())
|
|
|
|
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
|
|
|
|
def _is_set(v):
|
|
"""Returns True if v is a set created by sets.make().
|
|
|
|
Args:
|
|
v: The value whose type should be checked.
|
|
|
|
Returns:
|
|
True if v was created by sets.make(), False otherwise.
|
|
"""
|
|
return type(v) == _a_struct_type and hasattr(v, "_values") and _is_dict(v._values)
|
|
|
|
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,
|
|
is_set = _is_set,
|
|
)
|