Merge pull request #100 from yassun7010/use_assert_never

chore: use assert_never.

Author: ya7010

cmdcomp/completion.py

@@ -1,5 +1,6 @@
+from typing import assert_never
+
 from cmdcomp.config import Config
-from cmdcomp.exception import NeverReach
 from cmdcomp.shell import ShellType
 from cmdcomp.v1.completion import generate_v1
 from cmdcomp.v1.config import V1Config
@@ -16,4 +17,4 @@ def generate(shell: ShellType, config: Config) -> str:
             return generate_v2(shell, config.root)
 
         case _:
-            raise NeverReach(config.root)
+            assert_never(config.root)

cmdcomp/exception.py

@@ -1,6 +1,3 @@
-from typing import Never
-
-
 class CmdcompError(Exception):
     pass
 
@@ -12,11 +9,3 @@ def __init__(self, file: str, extension: str) -> None:
 
     def __str__(self) -> str:
         return f'file extension "{self._extension}" of "{self._file}" is not supported.'
-
-
-class NeverReach(CmdcompError):
-    def __init__(self, value: Never) -> None:
-        self._value = value
-
-    def __str__(self) -> str:
-        return f"never reach: {self._value}"

cmdcomp/v1/command/__init__.py

@@ -1,10 +1,9 @@
 from functools import reduce
 from operator import add
-from typing import Annotated, NewType, OrderedDict
+from typing import Annotated, NewType, OrderedDict, assert_never
 
 from pydantic import ConfigDict, Field
 
-from cmdcomp.exception import NeverReach
 from cmdcomp.model import Model
 from cmdcomp.v1.command.option import V1OptionType, V1SpecificOptions, V1StrOption
 from cmdcomp.v1.command.option.command_option import V1CommandOption
@@ -89,6 +88,6 @@ def get_candidates(command: V1Command) -> V1Candidates:
             elif isinstance(command.options, V1FileOption):
                 return [{"file": command.options.base_path}]
             else:
-                raise NeverReach(command.options)
+                assert_never(command.options)
         case _:
-            raise NeverReach(command)
+            assert_never(command)