Checks module bodies to be reachable #11361
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| @@ -307,6 +307,10 @@ def check_first_pass(self) -> None: | |||
| with self.tscope.module_scope(self.tree.fullname): | |||
| with self.enter_partial_types(), self.binder.top_frame_context(): | |||
| for d in self.tree.defs: | |||
| if (self.binder.is_unreachable() | |||
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self.accept(Block(self.tree.defs)) didn't work. Let's try explicit condition.
sobolevn
changed the title
| @@ -768,13 +768,13 @@ while isinstance(b, int): | |||
| else: | |||
| reveal_type(b) # E: Statement is unreachable | |||
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| def foo(c: int) -> None: | |||
| def foo(c: int) -> None: # E: Statement is unreachable | |||
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The rest of this test case should probably be moved to a new test case, since this is no longer testing what was the original intent, as everything is unreachable beyond this point.
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Is this resolved? Afaict the if False check should be in its own test case right?
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@JukkaL done! Now it is in sync with |
| @@ -768,13 +768,13 @@ while isinstance(b, int): | |||
| else: | |||
| reveal_type(b) # E: Statement is unreachable | |||
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| def foo(c: int) -> None: | |||
| def foo(c: int) -> None: # E: Statement is unreachable | |||
| reveal_type(c) # N: Revealed type is "builtins.int" | |||
| assert not isinstance(c, int) | |||
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Could be a clearer statement of intent to explicitly raise an exception here. This will not make the code below unreachable if run with assertions disabled, which you can do in Python.
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Nope, because we already have tests for explicit raise. Here we test assert False
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Ah, I see. I guess my point is that assert False isn't a safe way to block off code. But whether mypy recognizes that or not is a more high level design decision, and not a subject for this PR.
| @@ -768,13 +768,13 @@ while isinstance(b, int): | |||
| else: | |||
| reveal_type(b) # E: Statement is unreachable | |||
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| def foo(c: int) -> None: | |||
| def foo(c: int) -> None: # E: Statement is unreachable | |||
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Is this resolved? Afaict the if False check should be in its own test case right?
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@hauntsaninja I forgot to run |
This is a very simple change, but now module bodies are also checked to be reachable.
Let's see what effect it will have.
Closes #11331