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+# SPDX-FileCopyrightText: 2021 Melissa LeBlanc-Williams for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+"""
+`micropython` - MicroPython Specific Decorator Functions
+========================================================
+
+* Author(s): cefn
+"""
+
+from typing import Callable, TypeVar, Any, NoReturn
+
+Fun = TypeVar("Fun", bound=Callable[..., Any])
+
+def const[T](x: T) -> T:
+    "Emulate making a constant"
+
+def native(f: Fun) -> Fun:
+    "Emulate making a native"
+
+def viper(f: Fun) -> NoReturn:
+    "User is attempting to use a viper code emitter"
+
+def asm_thumb(f: Fun) -> NoReturn:
+    "User is attempting to use an inline assembler"