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[ty] disallow type variables within type variable bounds/constraints

This commit is contained in:
Shunsuke Shibayama 2025-12-13 16:52:19 +09:00
parent 9838f81baf
commit e59740eca3
10 changed files with 658 additions and 98 deletions
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192
crates/ty/docs/rules.md generated
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@ -39,7 +39,7 @@ def test(): -> "int":
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20call-non-callable" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L135" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L136" target="_blank">View source</a>
</small>
@ -63,7 +63,7 @@ Calling a non-callable object will raise a `TypeError` at runtime.
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20conflicting-argument-forms" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L179" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L180" target="_blank">View source</a>
</small>
@ -95,7 +95,7 @@ f(int) # error
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20conflicting-declarations" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L205" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L206" target="_blank">View source</a>
</small>
@ -126,7 +126,7 @@ a = 1
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20conflicting-metaclass" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L230" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L231" target="_blank">View source</a>
</small>
@ -158,7 +158,7 @@ class C(A, B): ...
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20cyclic-class-definition" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L256" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L257" target="_blank">View source</a>
</small>
@ -190,7 +190,7 @@ class B(A): ...
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Preview (since <a href="https://github.com/astral-sh/ty/releases/tag/1.0.0">1.0.0</a>) ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20cyclic-type-alias-definition" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L282" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L283" target="_blank">View source</a>
</small>
@ -218,7 +218,7 @@ type B = A
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20duplicate-base" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L343" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L344" target="_blank">View source</a>
</small>
@ -245,7 +245,7 @@ class B(A, A): ...
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.12">0.0.1-alpha.12</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20duplicate-kw-only" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L364" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L365" target="_blank">View source</a>
</small>
@ -357,7 +357,7 @@ def test(): -> "Literal[5]":
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20inconsistent-mro" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L590" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L591" target="_blank">View source</a>
</small>
@ -387,7 +387,7 @@ class C(A, B): ...
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20index-out-of-bounds" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L614" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L615" target="_blank">View source</a>
</small>
@ -413,7 +413,7 @@ t[3] # IndexError: tuple index out of range
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.12">0.0.1-alpha.12</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20instance-layout-conflict" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L396" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L397" target="_blank">View source</a>
</small>
@ -502,7 +502,7 @@ an atypical memory layout.
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-argument-type" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L668" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L669" target="_blank">View source</a>
</small>
@ -529,7 +529,7 @@ func("foo") # error: [invalid-argument-type]
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-assignment" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L708" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L709" target="_blank">View source</a>
</small>
@ -557,7 +557,7 @@ a: int = ''
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-attribute-access" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L2003" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L2036" target="_blank">View source</a>
</small>
@ -591,7 +591,7 @@ C.instance_var = 3 # error: Cannot assign to instance variable
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.19">0.0.1-alpha.19</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-await" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L730" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L731" target="_blank">View source</a>
</small>
@ -627,7 +627,7 @@ asyncio.run(main())
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-base" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L760" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L761" target="_blank">View source</a>
</small>
@ -651,7 +651,7 @@ class A(42): ... # error: [invalid-base]
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-context-manager" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L811" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L812" target="_blank">View source</a>
</small>
@ -678,7 +678,7 @@ with 1:
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-declaration" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L832" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L833" target="_blank">View source</a>
</small>
@ -707,7 +707,7 @@ a: str
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-exception-caught" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L855" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L856" target="_blank">View source</a>
</small>
@ -751,7 +751,7 @@ except ZeroDivisionError:
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.28">0.0.1-alpha.28</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-explicit-override" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1673" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1706" target="_blank">View source</a>
</small>
@ -793,7 +793,7 @@ class D(A):
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.35">0.0.1-alpha.35</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-frozen-dataclass-subclass" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L2229" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L2262" target="_blank">View source</a>
</small>
@ -837,7 +837,7 @@ class NonFrozenChild(FrozenBase): # Error raised here
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-generic-class" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L891" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L892" target="_blank">View source</a>
</small>
@ -875,7 +875,7 @@ class D(Generic[U, T]): ...
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.17">0.0.1-alpha.17</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-key" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L635" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L636" target="_blank">View source</a>
</small>
@ -914,7 +914,7 @@ carol = Person(name="Carol", age=25) # typo!
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-legacy-type-variable" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L922" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L923" target="_blank">View source</a>
</small>
@ -949,7 +949,7 @@ def f(t: TypeVar("U")): ...
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-metaclass" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1019" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1020" target="_blank">View source</a>
</small>
@ -983,7 +983,7 @@ class B(metaclass=f): ...
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.20">0.0.1-alpha.20</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-method-override" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L2131" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L2164" target="_blank">View source</a>
</small>
@ -1090,7 +1090,7 @@ Correct use of `@override` is enforced by ty's `invalid-explicit-override` rule.
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.19">0.0.1-alpha.19</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-named-tuple" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L542" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L543" target="_blank">View source</a>
</small>
@ -1144,7 +1144,7 @@ AttributeError: Cannot overwrite NamedTuple attribute _asdict
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Preview (since <a href="https://github.com/astral-sh/ty/releases/tag/1.0.0">1.0.0</a>) ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-newtype" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L995" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L996" target="_blank">View source</a>
</small>
@ -1174,7 +1174,7 @@ Baz = NewType("Baz", int | str) # error: invalid base for `typing.NewType`
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-overload" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1046" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1047" target="_blank">View source</a>
</small>
@ -1224,7 +1224,7 @@ def foo(x: int) -> int: ...
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-parameter-default" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1145" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1146" target="_blank">View source</a>
</small>
@ -1250,7 +1250,7 @@ def f(a: int = ''): ...
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-paramspec" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L950" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L951" target="_blank">View source</a>
</small>
@ -1281,7 +1281,7 @@ P2 = ParamSpec("S2") # error: ParamSpec name must match the variable it's assig
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-protocol" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L478" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L479" target="_blank">View source</a>
</small>
@ -1315,7 +1315,7 @@ TypeError: Protocols can only inherit from other protocols, got <class 'int'>
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-raise" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1165" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1166" target="_blank">View source</a>
</small>
@ -1364,7 +1364,7 @@ def g():
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-return-type" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L689" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L690" target="_blank">View source</a>
</small>
@ -1389,7 +1389,7 @@ def func() -> int:
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-super-argument" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1208" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1209" target="_blank">View source</a>
</small>
@ -1447,7 +1447,7 @@ TODO #14889
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.6">0.0.1-alpha.6</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-type-alias-type" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L974" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L975" target="_blank">View source</a>
</small>
@ -1474,7 +1474,7 @@ NewAlias = TypeAliasType(get_name(), int) # error: TypeAliasType name mus
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.29">0.0.1-alpha.29</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-type-arguments" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1440" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1473" target="_blank">View source</a>
</small>
@ -1521,7 +1521,7 @@ Bar[int] # error: too few arguments
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-type-checking-constant" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1247" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1248" target="_blank">View source</a>
</small>
@ -1551,7 +1551,7 @@ TYPE_CHECKING = ''
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-type-form" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1271" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1272" target="_blank">View source</a>
</small>
@ -1581,7 +1581,7 @@ b: Annotated[int] # `Annotated` expects at least two arguments
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.11">0.0.1-alpha.11</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-type-guard-call" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1323" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1324" target="_blank">View source</a>
</small>
@ -1615,7 +1615,7 @@ f(10) # Error
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.11">0.0.1-alpha.11</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-type-guard-definition" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1295" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1296" target="_blank">View source</a>
</small>
@ -1643,23 +1643,56 @@ class C:
def f(self) -> TypeIs[int]: ... # Error, only positional argument expected is `self`
```
## `invalid-type-variable-bound`
<small>
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/1.0.0">1.0.0</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-type-variable-bound" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1388" target="_blank">View source</a>
</small>
**What it does**
Checks for [type variables] whose bounds reference type variables.
**Why is this bad?**
The bound of a type variable must be a concrete type.
**Examples**
```python
T = TypeVar('T', bound=list['T']) # error: [invalid-type-variable-bound]
U = TypeVar('U')
T = TypeVar('T', bound=U) # error: [invalid-type-variable-bound]
def f[T: list[T]](): ... # error: [invalid-type-variable-bound]
def g[U, T: U](): ... # error: [invalid-type-variable-bound]
```
[type variable]: https://docs.python.org/3/library/typing.html#typing.TypeVar
## `invalid-type-variable-constraints`
<small>
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-type-variable-constraints" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1351" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1352" target="_blank">View source</a>
</small>
**What it does**
Checks for constrained [type variables] with only one constraint.
Checks for constrained [type variables] with only one constraint,
or that those constraints reference type variables.
**Why is this bad?**
A constrained type variable must have at least two constraints.
A constrained type variable must have at least two constraints,
and the constraints must be concrete types.
**Examples**
@ -1667,6 +1700,9 @@ A constrained type variable must have at least two constraints.
from typing import TypeVar
T = TypeVar('T', str) # invalid constrained TypeVar
I = TypeVar('I', bound=int)
U = TypeVar('U', list[I], int) # invalid constrained TypeVar
```
Use instead:
@ -1674,6 +1710,8 @@ Use instead:
T = TypeVar('T', str, int) # valid constrained TypeVar
# or
T = TypeVar('T', bound=str) # valid bound TypeVar
U = TypeVar('U', list[int], int) # valid constrained Type
```
[type variables]: https://docs.python.org/3/library/typing.html#typing.TypeVar
@ -1684,7 +1722,7 @@ T = TypeVar('T', bound=str) # valid bound TypeVar
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20missing-argument" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1380" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1413" target="_blank">View source</a>
</small>
@ -1709,7 +1747,7 @@ func() # TypeError: func() missing 1 required positional argument: 'x'
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.20">0.0.1-alpha.20</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20missing-typed-dict-key" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L2104" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L2137" target="_blank">View source</a>
</small>
@ -1742,7 +1780,7 @@ alice["age"] # KeyError
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20no-matching-overload" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1399" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1432" target="_blank">View source</a>
</small>
@ -1771,7 +1809,7 @@ func("string") # error: [no-matching-overload]
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20non-subscriptable" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1422" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1455" target="_blank">View source</a>
</small>
@ -1795,7 +1833,7 @@ Subscripting an object that does not support it will raise a `TypeError` at runt
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20not-iterable" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1481" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1514" target="_blank">View source</a>
</small>
@ -1821,7 +1859,7 @@ for i in 34: # TypeError: 'int' object is not iterable
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.29">0.0.1-alpha.29</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20override-of-final-method" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1646" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1679" target="_blank">View source</a>
</small>
@ -1854,7 +1892,7 @@ class B(A):
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20parameter-already-assigned" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1532" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1565" target="_blank">View source</a>
</small>
@ -1881,7 +1919,7 @@ f(1, x=2) # Error raised here
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.22">0.0.1-alpha.22</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20positional-only-parameter-as-kwarg" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1857" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1890" target="_blank">View source</a>
</small>
@ -1939,7 +1977,7 @@ def test(): -> "int":
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20static-assert-error" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1979" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L2012" target="_blank">View source</a>
</small>
@ -1969,7 +2007,7 @@ static_assert(int(2.0 * 3.0) == 6) # error: does not have a statically known tr
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20subclass-of-final-class" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1623" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1656" target="_blank">View source</a>
</small>
@ -1998,7 +2036,7 @@ class B(A): ... # Error raised here
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Preview (since <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.30">0.0.1-alpha.30</a>) ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20super-call-in-named-tuple-method" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1791" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1824" target="_blank">View source</a>
</small>
@ -2032,7 +2070,7 @@ class F(NamedTuple):
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20too-many-positional-arguments" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1731" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1764" target="_blank">View source</a>
</small>
@ -2059,7 +2097,7 @@ f("foo") # Error raised here
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20type-assertion-failure" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1709" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1742" target="_blank">View source</a>
</small>
@ -2087,7 +2125,7 @@ def _(x: int):
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unavailable-implicit-super-arguments" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1752" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1785" target="_blank">View source</a>
</small>
@ -2133,7 +2171,7 @@ class A:
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unknown-argument" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1836" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1869" target="_blank">View source</a>
</small>
@ -2160,7 +2198,7 @@ f(x=1, y=2) # Error raised here
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unresolved-attribute" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1878" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1911" target="_blank">View source</a>
</small>
@ -2188,7 +2226,7 @@ A().foo # AttributeError: 'A' object has no attribute 'foo'
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unresolved-import" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1900" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1933" target="_blank">View source</a>
</small>
@ -2213,7 +2251,7 @@ import foo # ModuleNotFoundError: No module named 'foo'
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unresolved-reference" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1919" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1952" target="_blank">View source</a>
</small>
@ -2238,7 +2276,7 @@ print(x) # NameError: name 'x' is not defined
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unsupported-bool-conversion" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1501" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1534" target="_blank">View source</a>
</small>
@ -2275,7 +2313,7 @@ b1 < b2 < b1 # exception raised here
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unsupported-operator" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1938" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1971" target="_blank">View source</a>
</small>
@ -2303,7 +2341,7 @@ A() + A() # TypeError: unsupported operand type(s) for +: 'A' and 'A'
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20zero-stepsize-in-slice" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1960" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1993" target="_blank">View source</a>
</small>
@ -2328,7 +2366,7 @@ l[1:10:0] # ValueError: slice step cannot be zero
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'warn'."><code>warn</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.20">0.0.1-alpha.20</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20ambiguous-protocol-member" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L507" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L508" target="_blank">View source</a>
</small>
@ -2369,7 +2407,7 @@ class SubProto(BaseProto, Protocol):
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'warn'."><code>warn</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.16">0.0.1-alpha.16</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20deprecated" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L322" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L323" target="_blank">View source</a>
</small>
@ -2457,7 +2495,7 @@ a = 20 / 0 # type: ignore
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'warn'."><code>warn</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.22">0.0.1-alpha.22</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20possibly-missing-attribute" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1553" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1586" target="_blank">View source</a>
</small>
@ -2485,7 +2523,7 @@ A.c # AttributeError: type object 'A' has no attribute 'c'
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'warn'."><code>warn</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.22">0.0.1-alpha.22</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20possibly-missing-implicit-call" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L153" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L154" target="_blank">View source</a>
</small>
@ -2517,7 +2555,7 @@ A()[0] # TypeError: 'A' object is not subscriptable
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'warn'."><code>warn</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.22">0.0.1-alpha.22</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20possibly-missing-import" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1575" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1608" target="_blank">View source</a>
</small>
@ -2549,7 +2587,7 @@ from module import a # ImportError: cannot import name 'a' from 'module'
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'warn'."><code>warn</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20redundant-cast" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L2031" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L2064" target="_blank">View source</a>
</small>
@ -2576,7 +2614,7 @@ cast(int, f()) # Redundant
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'warn'."><code>warn</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20undefined-reveal" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1818" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1851" target="_blank">View source</a>
</small>
@ -2600,7 +2638,7 @@ reveal_type(1) # NameError: name 'reveal_type' is not defined
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'warn'."><code>warn</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.15">0.0.1-alpha.15</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unresolved-global" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L2052" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L2085" target="_blank">View source</a>
</small>
@ -2658,7 +2696,7 @@ def g():
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'warn'."><code>warn</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.7">0.0.1-alpha.7</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unsupported-base" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L778" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L779" target="_blank">View source</a>
</small>
@ -2697,7 +2735,7 @@ class D(C): ... # error: [unsupported-base]
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'warn'."><code>warn</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.22">0.0.1-alpha.22</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20useless-overload-body" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1089" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1090" target="_blank">View source</a>
</small>
@ -2760,7 +2798,7 @@ def foo(x: int | str) -> int | str:
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'ignore'."><code>ignore</code></a> ·
Preview (since <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a>) ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20division-by-zero" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L304" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L305" target="_blank">View source</a>
</small>
@ -2784,7 +2822,7 @@ Dividing by zero raises a `ZeroDivisionError` at runtime.
Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'ignore'."><code>ignore</code></a> ·
Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20possibly-unresolved-reference" target="_blank">Related issues</a> ·
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1601" target="_blank">View source</a>
<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1634" target="_blank">View source</a>
</small>

8
crates/ty_python_semantic/resources/mdtest/generics/legacy/variables.md
View File

@ -441,6 +441,8 @@ def constrained(x: T_constrained):
### Bounds and constraints
<!-- snapshot-diagnostics -->
A typevar's bounds and constraints cannot be generic, cyclic or otherwise:
```py
@ -448,13 +450,13 @@ from typing import Any, TypeVar
S = TypeVar("S")
# TODO: error
# error: [invalid-type-variable-bound]
T = TypeVar("T", bound=list[S])
# TODO: error
# error: [invalid-type-variable-constraints]
U = TypeVar("U", list["T"], str)
# TODO: error
# error: [invalid-type-variable-constraints]
V = TypeVar("V", list["V"], str)
```

4
crates/ty_python_semantic/resources/mdtest/generics/pep695/classes.md
View File

@ -710,10 +710,10 @@ reveal_type(WithOverloadedMethod[int].method)
### No back-references
Typevar bounds/constraints/defaults are lazy, but cannot refer to later typevars:
Typevar bounds/constraints/defaults are lazy, but cannot refer to other typevars:
```py
# TODO error
# error: [invalid-type-variable-bound]
class C[S: T, T]:
pass

18
crates/ty_python_semantic/resources/mdtest/generics/pep695/variables.md
View File

@ -794,16 +794,18 @@ def constrained[T: (int, str)](x: T):
### Bounds and constraints
<!-- snapshot-diagnostics -->
A typevar's bounds and constraints cannot be generic, cyclic or otherwise:
```py
from typing import Any
# TODO: error
# error: [invalid-type-variable-bound]
def f[S, T: list[S]](x: S, y: T) -> S | T:
return x or y
# TODO: error
# error: [invalid-type-variable-bound]
class C[S, T: list[S]]:
x: S
y: T
@ -811,21 +813,21 @@ class C[S, T: list[S]]:
reveal_type(C[int, list[Any]]().x) # revealed: int
reveal_type(C[int, list[Any]]().y) # revealed: list[Any]
# TODO: error
# error: [invalid-type-variable-bound]
def g[T: list[T]](x: T) -> T:
return x
# TODO: error
# error: [invalid-type-variable-bound]
class D[T: list[T]]:
x: T
reveal_type(D[list[Any]]().x) # revealed: list[Any]
# TODO: error
# error: [invalid-type-variable-constraints]
def h[S, T: (list[S], str)](x: S, y: T) -> S | T:
return x or y
# TODO: error
# error: [invalid-type-variable-constraints]
class E[S, T: (list[S], str)]:
x: S
y: T
@ -833,11 +835,11 @@ class E[S, T: (list[S], str)]:
reveal_type(E[int, str]().x) # revealed: int
reveal_type(E[int, str]().y) # revealed: str
# TODO: error
# error: [invalid-type-variable-constraints]
def i[T: (list[T], str)](x: T) -> T:
return x
# TODO: error
# error: [invalid-type-variable-constraints]
class F[T: (list[T], str)]:
x: T

124
crates/ty_python_semantic/resources/mdtest/snapshots/variables.md_-_Legacy_type_variable…_-_Cycles_-_Bounds_and_constrain…_(1c0a5d9209a531cd).snap Normal file
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@ -0,0 +1,124 @@
---
source: crates/ty_test/src/lib.rs
expression: snapshot
---
---
mdtest name: variables.md - Legacy type variables - Cycles - Bounds and constraints
mdtest path: crates/ty_python_semantic/resources/mdtest/generics/legacy/variables.md
---
# Python source files
## mdtest_snippet.py
```
1 | from typing import Any, TypeVar
2 |
3 | S = TypeVar("S")
4 |
5 | # error: [invalid-type-variable-bound]
6 | T = TypeVar("T", bound=list[S])
7 |
8 | # error: [invalid-type-variable-constraints]
9 | U = TypeVar("U", list["T"], str)
10 |
11 | # error: [invalid-type-variable-constraints]
12 | V = TypeVar("V", list["V"], str)
13 | from typing import TypeVar, Generic
14 |
15 | T = TypeVar("T", bound=list["G"])
16 |
17 | class G(Generic[T]):
18 | x: T
19 |
20 | reveal_type(G[list[G]]().x) # revealed: list[G[Unknown]]
21 | from typing import TypeVar, Generic
22 |
23 | # error: [invalid-type-arguments]
24 | T = TypeVar("T", bound="Node[int]")
25 |
26 | class Node(Generic[T]):
27 | pass
28 |
29 | # error: [invalid-type-arguments]
30 | def _(n: Node[str]):
31 | reveal_type(n) # revealed: Node[Unknown]
```
# Diagnostics
```
error[invalid-type-variable-bound]: Type variable bound type cannot be generic
--> src/mdtest_snippet.py:6:18
|
5 | # error: [invalid-type-variable-bound]
6 | T = TypeVar("T", bound=list[S])
| ^^^^^^^^^^^^^
7 |
8 | # error: [invalid-type-variable-constraints]
|
info: rule `invalid-type-variable-bound` is enabled by default
```
```
error[invalid-type-variable-constraints]: Type variable constraint types cannot be generic
--> src/mdtest_snippet.py:9:18
|
8 | # error: [invalid-type-variable-constraints]
9 | U = TypeVar("U", list["T"], str)
| ^^^^^^^^^
10 |
11 | # error: [invalid-type-variable-constraints]
|
info: rule `invalid-type-variable-constraints` is enabled by default
```
```
error[invalid-type-variable-constraints]: Type variable constraint types cannot be generic
--> src/mdtest_snippet.py:12:18
|
11 | # error: [invalid-type-variable-constraints]
12 | V = TypeVar("V", list["V"], str)
| ^^^^^^^^^
13 | from typing import TypeVar, Generic
|
info: rule `invalid-type-variable-constraints` is enabled by default
```
```
error[invalid-type-arguments]: Type `int` is not assignable to upper bound `Node[Unknown] | Node[int]` of type variable `T@Node`
--> src/mdtest_snippet.py:24:1
|
23 | # error: [invalid-type-arguments]
24 | T = TypeVar("T", bound="Node[int]")
| - Type variable defined here ^^^
25 |
26 | class Node(Generic[T]):
|
info: rule `invalid-type-arguments` is enabled by default
```
```
error[invalid-type-arguments]: Type `str` is not assignable to upper bound `Node[Unknown] | Node[int]` of type variable `T@Node`
--> src/mdtest_snippet.py:30:15
|
29 | # error: [invalid-type-arguments]
30 | def _(n: Node[str]):
| ^^^
31 | reveal_type(n) # revealed: Node[Unknown]
|
::: src/mdtest_snippet.py:24:1
|
23 | # error: [invalid-type-arguments]
24 | T = TypeVar("T", bound="Node[int]")
| - Type variable defined here
25 |
26 | class Node(Generic[T]):
|
info: rule `invalid-type-arguments` is enabled by default
```

216
crates/ty_python_semantic/resources/mdtest/snapshots/variables.md_-_PEP_695_Generics_-_Cycles_-_Bounds_and_constrain…_(c7a923bb701940f3).snap Normal file
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@ -0,0 +1,216 @@
---
source: crates/ty_test/src/lib.rs
expression: snapshot
---
---
mdtest name: variables.md - PEP 695 Generics - Cycles - Bounds and constraints
mdtest path: crates/ty_python_semantic/resources/mdtest/generics/pep695/variables.md
---
# Python source files
## mdtest_snippet.py
```
1 | from typing import Any
2 |
3 | # error: [invalid-type-variable-bound]
4 | def f[S, T: list[S]](x: S, y: T) -> S | T:
5 | return x or y
6 |
7 | # error: [invalid-type-variable-bound]
8 | class C[S, T: list[S]]:
9 | x: S
10 | y: T
11 |
12 | reveal_type(C[int, list[Any]]().x) # revealed: int
13 | reveal_type(C[int, list[Any]]().y) # revealed: list[Any]
14 |
15 | # error: [invalid-type-variable-bound]
16 | def g[T: list[T]](x: T) -> T:
17 | return x
18 |
19 | # error: [invalid-type-variable-bound]
20 | class D[T: list[T]]:
21 | x: T
22 |
23 | reveal_type(D[list[Any]]().x) # revealed: list[Any]
24 |
25 | # error: [invalid-type-variable-constraints]
26 | def h[S, T: (list[S], str)](x: S, y: T) -> S | T:
27 | return x or y
28 |
29 | # error: [invalid-type-variable-constraints]
30 | class E[S, T: (list[S], str)]:
31 | x: S
32 | y: T
33 |
34 | reveal_type(E[int, str]().x) # revealed: int
35 | reveal_type(E[int, str]().y) # revealed: str
36 |
37 | # error: [invalid-type-variable-constraints]
38 | def i[T: (list[T], str)](x: T) -> T:
39 | return x
40 |
41 | # error: [invalid-type-variable-constraints]
42 | class F[T: (list[T], str)]:
43 | x: T
44 |
45 | reveal_type(F[list[Any]]().x) # revealed: list[Any]
46 | class G[T: list[G]]:
47 | x: T
48 |
49 | reveal_type(G[list[G]]().x) # revealed: list[G[Unknown]]
50 | # error: [invalid-type-arguments]
51 | class Node[T: "Node[int]"]:
52 | pass
53 |
54 | # error: [invalid-type-arguments]
55 | def _(n: Node[str]):
56 | reveal_type(n) # revealed: Node[Unknown]
```
# Diagnostics
```
error[invalid-type-variable-bound]: Type variable bound type cannot be generic
--> src/mdtest_snippet.py:4:13
|
3 | # error: [invalid-type-variable-bound]
4 | def f[S, T: list[S]](x: S, y: T) -> S | T:
| ^^^^^^^
5 | return x or y
|
info: rule `invalid-type-variable-bound` is enabled by default
```
```
error[invalid-type-variable-bound]: Type variable bound type cannot be generic
--> src/mdtest_snippet.py:8:15
|
7 | # error: [invalid-type-variable-bound]
8 | class C[S, T: list[S]]:
| ^^^^^^^
9 | x: S
10 | y: T
|
info: rule `invalid-type-variable-bound` is enabled by default
```
```
error[invalid-type-variable-bound]: Type variable bound type cannot be generic
--> src/mdtest_snippet.py:16:10
|
15 | # error: [invalid-type-variable-bound]
16 | def g[T: list[T]](x: T) -> T:
| ^^^^^^^
17 | return x
|
info: rule `invalid-type-variable-bound` is enabled by default
```
```
error[invalid-type-variable-bound]: Type variable bound type cannot be generic
--> src/mdtest_snippet.py:20:12
|
19 | # error: [invalid-type-variable-bound]
20 | class D[T: list[T]]:
| ^^^^^^^
21 | x: T
|
info: rule `invalid-type-variable-bound` is enabled by default
```
```
error[invalid-type-variable-constraints]: Type variable constraint types cannot be generic
--> src/mdtest_snippet.py:26:14
|
25 | # error: [invalid-type-variable-constraints]
26 | def h[S, T: (list[S], str)](x: S, y: T) -> S | T:
| ^^^^^^^
27 | return x or y
|
info: rule `invalid-type-variable-constraints` is enabled by default
```
```
error[invalid-type-variable-constraints]: Type variable constraint types cannot be generic
--> src/mdtest_snippet.py:30:16
|
29 | # error: [invalid-type-variable-constraints]
30 | class E[S, T: (list[S], str)]:
| ^^^^^^^
31 | x: S
32 | y: T
|
info: rule `invalid-type-variable-constraints` is enabled by default
```
```
error[invalid-type-variable-constraints]: Type variable constraint types cannot be generic
--> src/mdtest_snippet.py:38:11
|
37 | # error: [invalid-type-variable-constraints]
38 | def i[T: (list[T], str)](x: T) -> T:
| ^^^^^^^
39 | return x
|
info: rule `invalid-type-variable-constraints` is enabled by default
```
```
error[invalid-type-variable-constraints]: Type variable constraint types cannot be generic
--> src/mdtest_snippet.py:42:13
|
41 | # error: [invalid-type-variable-constraints]
42 | class F[T: (list[T], str)]:
| ^^^^^^^
43 | x: T
|
info: rule `invalid-type-variable-constraints` is enabled by default
```
```
error[invalid-type-arguments]: Type `int` is not assignable to upper bound `Node[Unknown] | Node[int]` of type variable `T@Node`
--> src/mdtest_snippet.py:51:12
|
49 | reveal_type(G[list[G]]().x) # revealed: list[G[Unknown]]
50 | # error: [invalid-type-arguments]
51 | class Node[T: "Node[int]"]:
| - ^^^
| |
| Type variable defined here
52 | pass
|
info: rule `invalid-type-arguments` is enabled by default
```
```
error[invalid-type-arguments]: Type `str` is not assignable to upper bound `Node[Unknown] | Node[int]` of type variable `T@Node`
--> src/mdtest_snippet.py:55:15
|
54 | # error: [invalid-type-arguments]
55 | def _(n: Node[str]):
| ^^^
56 | reveal_type(n) # revealed: Node[Unknown]
|
::: src/mdtest_snippet.py:51:12
|
49 | reveal_type(G[list[G]]().x) # revealed: list[G[Unknown]]
50 | # error: [invalid-type-arguments]
51 | class Node[T: "Node[int]"]:
| - Type variable defined here
52 | pass
|
info: rule `invalid-type-arguments` is enabled by default
```

37
crates/ty_python_semantic/src/types/diagnostic.rs
View File

@ -90,6 +90,7 @@ pub(crate) fn register_lints(registry: &mut LintRegistryBuilder) {
registry.register_lint(&INVALID_TYPE_GUARD_DEFINITION);
registry.register_lint(&INVALID_TYPE_GUARD_CALL);
registry.register_lint(&INVALID_TYPE_VARIABLE_CONSTRAINTS);
registry.register_lint(&INVALID_TYPE_VARIABLE_BOUND);
registry.register_lint(&MISSING_ARGUMENT);
registry.register_lint(&NO_MATCHING_OVERLOAD);
registry.register_lint(&NON_SUBSCRIPTABLE);
@ -1350,16 +1351,21 @@ declare_lint! {
declare_lint! {
/// ## What it does
/// Checks for constrained [type variables] with only one constraint.
/// Checks for constrained [type variables] with only one constraint,
/// or that those constraints reference type variables.
///
/// ## Why is this bad?
/// A constrained type variable must have at least two constraints.
/// A constrained type variable must have at least two constraints,
/// and the constraints must be concrete types.
///
/// ## Examples
/// ```python
/// from typing import TypeVar
///
/// T = TypeVar('T', str) # invalid constrained TypeVar
///
/// I = TypeVar('I', bound=int)
/// U = TypeVar('U', list[I], int) # invalid constrained TypeVar
/// ```
///
/// Use instead:
@ -1367,6 +1373,8 @@ declare_lint! {
/// T = TypeVar('T', str, int) # valid constrained TypeVar
/// # or
/// T = TypeVar('T', bound=str) # valid bound TypeVar
///
/// U = TypeVar('U', list[int], int) # valid constrained Type
/// ```
///
/// [type variables]: https://docs.python.org/3/library/typing.html#typing.TypeVar
@ -1377,6 +1385,31 @@ declare_lint! {
}
}
declare_lint! {
/// ## What it does
/// Checks for [type variables] whose bounds reference type variables.
///
/// ## Why is this bad?
/// The bound of a type variable must be a concrete type.
///
/// ## Examples
/// ```python
/// T = TypeVar('T', bound=list['T']) # error: [invalid-type-variable-bound]
/// U = TypeVar('U')
/// T = TypeVar('T', bound=U) # error: [invalid-type-variable-bound]
///
/// def f[T: list[T]](): ... # error: [invalid-type-variable-bound]
/// def g[U, T: U](): ... # error: [invalid-type-variable-bound]
/// ```
///
/// [type variable]: https://docs.python.org/3/library/typing.html#typing.TypeVar
pub(crate) static INVALID_TYPE_VARIABLE_BOUND = {
summary: "detects invalid type variable bounds",
status: LintStatus::stable("1.0.0"),
default_level: Level::Error,
}
}
declare_lint! {
/// ## What it does
/// Checks for missing required arguments in a call.

144
crates/ty_python_semantic/src/types/infer/builder.rs
View File

@ -63,11 +63,11 @@ use crate::types::diagnostic::{
INVALID_LEGACY_TYPE_VARIABLE, INVALID_METACLASS, INVALID_NAMED_TUPLE, INVALID_NEWTYPE,
INVALID_OVERLOAD, INVALID_PARAMETER_DEFAULT, INVALID_PARAMSPEC, INVALID_PROTOCOL,
INVALID_TYPE_ARGUMENTS, INVALID_TYPE_FORM, INVALID_TYPE_GUARD_CALL,
INVALID_TYPE_VARIABLE_CONSTRAINTS, IncompatibleBases, NON_SUBSCRIPTABLE,
POSSIBLY_MISSING_ATTRIBUTE, POSSIBLY_MISSING_IMPLICIT_CALL, POSSIBLY_MISSING_IMPORT,
SUBCLASS_OF_FINAL_CLASS, UNDEFINED_REVEAL, UNRESOLVED_ATTRIBUTE, UNRESOLVED_GLOBAL,
UNRESOLVED_IMPORT, UNRESOLVED_REFERENCE, UNSUPPORTED_OPERATOR, USELESS_OVERLOAD_BODY,
hint_if_stdlib_attribute_exists_on_other_versions,
INVALID_TYPE_VARIABLE_BOUND, INVALID_TYPE_VARIABLE_CONSTRAINTS, IncompatibleBases,
NON_SUBSCRIPTABLE, POSSIBLY_MISSING_ATTRIBUTE, POSSIBLY_MISSING_IMPLICIT_CALL,
POSSIBLY_MISSING_IMPORT, SUBCLASS_OF_FINAL_CLASS, UNDEFINED_REVEAL, UNRESOLVED_ATTRIBUTE,
UNRESOLVED_GLOBAL, UNRESOLVED_IMPORT, UNRESOLVED_REFERENCE, UNSUPPORTED_OPERATOR,
USELESS_OVERLOAD_BODY, hint_if_stdlib_attribute_exists_on_other_versions,
hint_if_stdlib_submodule_exists_on_other_versions, report_attempted_protocol_instantiation,
report_bad_dunder_set_call, report_bad_frozen_dataclass_inheritance,
report_cannot_pop_required_field_on_typed_dict, report_duplicate_bases,
@ -564,6 +564,9 @@ impl<'db, 'ast> TypeInferenceBuilder<'db, 'ast> {
}
}
if self.db().should_check_file(self.file()) {
self.check_legacy_typevars();
}
// Infer deferred types for all definitions.
for definition in std::mem::take(&mut self.deferred) {
self.extend_definition(infer_deferred_types(self.db(), definition));
@ -577,6 +580,7 @@ impl<'db, 'ast> TypeInferenceBuilder<'db, 'ast> {
if self.db().should_check_file(self.file()) {
self.check_class_definitions();
self.check_overloaded_functions(node);
self.check_pep695_typevars();
}
}
@ -1291,6 +1295,131 @@ impl<'db, 'ast> TypeInferenceBuilder<'db, 'ast> {
}
}
fn check_legacy_typevars(&mut self) {
let typevars = self.deferred.iter().filter_map(|definition| {
if let DefinitionKind::Assignment(assignment) = definition.kind(self.db()) {
let ast::Expr::Call(call) = assignment.value(self.module()) else {
return None;
};
let inference = infer_definition_types(self.db(), *definition);
Some((call, inference.binding_type(*definition)))
} else {
None
}
});
// The current Python type specification is that the bounds and constraints of type variables must be concrete types,
// and an error must occur if type variables are included.
for (call, ty) in typevars {
let Type::KnownInstance(KnownInstanceType::TypeVar(typevar)) = ty else {
continue;
};
let has_typevar = |ty| {
any_over_type(
self.db(),
ty,
&|ty| matches!(ty, Type::KnownInstance(KnownInstanceType::TypeVar(_))),
false,
)
};
match typevar.bound_or_constraints(self.db()) {
Some(TypeVarBoundOrConstraints::UpperBound(bound_ty)) => {
let Some(bound) = call.arguments.find_keyword("bound") else {
continue;
};
if has_typevar(bound_ty)
&& let Some(builder) = self
.context
.report_lint(&INVALID_TYPE_VARIABLE_BOUND, bound)
{
builder.into_diagnostic("Type variable bound type cannot be generic");
}
}
Some(TypeVarBoundOrConstraints::Constraints(constraints)) => {
for constraint in constraints
.elements(self.db())
.iter()
.enumerate()
.filter_map(|(i, ty)| {
has_typevar(*ty).then_some(call.arguments.args.get(i + 1)?)
})
{
if let Some(builder) = self
.context
.report_lint(&INVALID_TYPE_VARIABLE_CONSTRAINTS, constraint)
{
builder.into_diagnostic(
"Type variable constraint types cannot be generic",
);
}
}
}
None => {}
}
}
}
fn check_pep695_typevars(&mut self) {
let typevars = self.declarations.iter().filter_map(|(definition, ty)| {
if let DefinitionKind::TypeVar(typevar) = definition.kind(self.db()) {
Some((typevar.node(self.module()), ty.inner_type()))
} else {
None
}
});
// The current Python type specification is that the bounds and constraints of type variables must be concrete types,
// and an error must occur if type variables are included.
for (node, ty) in typevars {
let Type::KnownInstance(KnownInstanceType::TypeVar(typevar)) = ty else {
continue;
};
let Some(bound) = node.bound.as_deref() else {
continue;
};
let has_typevar = |ty| {
any_over_type(
self.db(),
ty,
&|ty| matches!(ty, Type::KnownInstance(KnownInstanceType::TypeVar(_))),
false,
)
};
match typevar.bound_or_constraints(self.db()) {
Some(TypeVarBoundOrConstraints::UpperBound(bound_ty)) => {
if has_typevar(bound_ty)
&& let Some(builder) = self
.context
.report_lint(&INVALID_TYPE_VARIABLE_BOUND, bound)
{
builder.into_diagnostic("Type variable bound type cannot be generic");
}
}
Some(TypeVarBoundOrConstraints::Constraints(constraints)) => {
let ast::Expr::Tuple(tuple) = bound else {
continue;
};
for constraint in constraints
.elements(self.db())
.iter()
.enumerate()
.filter_map(|(i, ty)| has_typevar(*ty).then_some(tuple.elts.get(i)?))
{
if let Some(builder) = self
.context
.report_lint(&INVALID_TYPE_VARIABLE_CONSTRAINTS, constraint)
{
builder.into_diagnostic(
"Type variable constraint types cannot be generic",
);
}
}
}
None => {}
}
}
}
fn infer_region_definition(&mut self, definition: Definition<'db>) {
match definition.kind(self.db()) {
DefinitionKind::Function(function) => {
@ -13075,6 +13204,11 @@ impl<V> VecSet<V> {
self.0.is_empty()
}
#[inline]
fn iter(&self) -> std::slice::Iter<'_, V> {
self.0.iter()
}
fn into_boxed_slice(self) -> Box<[V]> {
self.0.into_boxed_slice()
}

1
crates/ty_server/tests/e2e/snapshots/e2e__commands__debug_command.snap
View File

@ -78,6 +78,7 @@ Settings: Settings {
"invalid-type-form": Error (Default),
"invalid-type-guard-call": Error (Default),
"invalid-type-guard-definition": Error (Default),
"invalid-type-variable-bound": Error (Default),
"invalid-type-variable-constraints": Error (Default),
"missing-argument": Error (Default),
"missing-typed-dict-key": Error (Default),

12
ty.schema.json generated
View File

@ -813,9 +813,19 @@
}
]
},
"invalid-type-variable-bound": {
"title": "detects invalid type variable bounds",
"description": "## What it does\nChecks for [type variables] whose bounds reference type variables.\n\n## Why is this bad?\nThe bound of a type variable must be a concrete type.\n\n## Examples\n```python\nT = TypeVar('T', bound=list['T']) # error: [invalid-type-variable-bound]\nU = TypeVar('U')\nT = TypeVar('T', bound=U) # error: [invalid-type-variable-bound]\n\ndef f[T: list[T]](): ... # error: [invalid-type-variable-bound]\ndef g[U, T: U](): ... # error: [invalid-type-variable-bound]\n```\n\n[type variable]: https://docs.python.org/3/library/typing.html#typing.TypeVar",
"default": "error",
"oneOf": [
{
"$ref": "#/definitions/Level"
}
]
},
"invalid-type-variable-constraints": {
"title": "detects invalid type variable constraints",
"description": "## What it does\nChecks for constrained [type variables] with only one constraint.\n\n## Why is this bad?\nA constrained type variable must have at least two constraints.\n\n## Examples\n```python\nfrom typing import TypeVar\n\nT = TypeVar('T', str) # invalid constrained TypeVar\n```\n\nUse instead:\n```python\nT = TypeVar('T', str, int) # valid constrained TypeVar\n# or\nT = TypeVar('T', bound=str) # valid bound TypeVar\n```\n\n[type variables]: https://docs.python.org/3/library/typing.html#typing.TypeVar",
"description": "## What it does\nChecks for constrained [type variables] with only one constraint,\nor that those constraints reference type variables.\n\n## Why is this bad?\nA constrained type variable must have at least two constraints,\nand the constraints must be concrete types.\n\n## Examples\n```python\nfrom typing import TypeVar\n\nT = TypeVar('T', str) # invalid constrained TypeVar\n\nI = TypeVar('I', bound=int)\nU = TypeVar('U', list[I], int) # invalid constrained TypeVar\n```\n\nUse instead:\n```python\nT = TypeVar('T', str, int) # valid constrained TypeVar\n# or\nT = TypeVar('T', bound=str) # valid bound TypeVar\n\nU = TypeVar('U', list[int], int) # valid constrained Type\n```\n\n[type variables]: https://docs.python.org/3/library/typing.html#typing.TypeVar",
"default": "error",
"oneOf": [
{