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ddc1c3e9bd
Make custom transformation wrappers such as `custom_jvp` behave interchangeably when directly composed. For example, enable the following usage: ``` @jax.custom_jvp @jax.custom_transpose def f(x): ... @f.def_transpose def f_t(y): ... @f.defjvp def f_jvp(x, tx): ... ``` In particular: * Forward `def*` methods on custom transformations. * Have unary `def*` methods return their argument so that, when used as decorators, they do not replace their target with `None`. * Fix a bug in the use of `functools.update_wrapper`: previously a wrapper would overwrite its own attributes with those of the target callable (including its reference to the target callable).
27 lines
870 B
Python
27 lines
870 B
Python
# Copyright 2022 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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_custom_wrapper_types = set()
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def register_custom_decorator_type(cls):
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_custom_wrapper_types.add(cls)
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return cls
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def forward_attr(self_, name):
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if name.startswith('def') and type(self_.fun) in _custom_wrapper_types:
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return getattr(self_.fun, name)
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else:
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raise AttributeError
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