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2026-07-13 12:40:42 +08:00

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Python

# Copyright (c) 2025 PaddlePaddle 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.
from __future__ import annotations
from typing import Generic, TypeVar
_T = TypeVar("_T", "int", "float", "bool")
class SymbolicValue(Generic[_T]):
example_value: _T | None
def __init__(self, example_value=None):
self.example_value = example_value
def __repr__(self) -> str:
if self.is_backed():
return f"{self.__class__.__name__}({self.example_value})"
return f"{self.__class__.__name__}()"
def get_static_type(self) -> type[_T]:
raise NotImplementedError("get_py_type is not implemented.")
def is_backed(self):
return self.example_value is not None
def get_example_value(self) -> _T:
if self.example_value is None:
raise ValueError(f"{self} is not backed by a value.")
return self.example_value
class SymbolicBool(SymbolicValue):
def get_static_type(self) -> type[bool]:
return bool
class SymbolicInt(SymbolicValue):
def get_static_type(self) -> type[int]:
return int
class SymbolicFloat(SymbolicValue):
def get_static_type(self) -> type[float]:
return float