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Alex Waygood ec3d5ebda2
[ty] Upcast heterogeneous and mixed tuples to homogeneous tuples where it's necessary to solve a TypeVar (#19635) 
## Summary

This PR improves our generics solver such that we are able to solve the
`TypeVar` in this snippet to `int | str` (the union of the elements in
the heterogeneous tuple) by upcasting the heterogeneous tuple to its
pure-homogeneous-tuple supertype:

```py
def f[T](x: tuple[T, ...]) -> T:
    return x[0]

def g(x: tuple[int, str]):
    reveal_type(f(x))
```

## Test Plan

Mdtests. Some TODOs remain in the mdtest regarding solving `TypeVar`s
for mixed tuples, but I think this PR on its own is a significant step
forward for our generics solver when it comes to tuple types.

---------

Co-authored-by: Douglas Creager <dcreager@dcreager.net>
2025-07-30 17:12:21 +01:00
..
ruff Bump 0.12.7 (#19627) 2025-07-29 18:18:42 -04:00
ruff_annotate_snippets Update Rust toolchain to 1.88 and MSRV to 1.86 (#19011) 2025-06-28 20:24:00 +02:00
ruff_benchmark [ty] Add support for @warnings.deprecated (#19376) 2025-07-18 23:50:29 +00:00
ruff_cache Switch to Rust 2024 edition (#18129) 2025-05-16 13:25:28 +02:00
ruff_db Always expand tabs to four spaces in diagnostics (#19618) 2025-07-30 11:00:36 -04:00
ruff_dev Auto-generate environment variable references for ty (#19205) 2025-07-08 10:48:31 -04:00
ruff_diagnostics [ty] Implement diagnostic caching (#19605) 2025-07-30 11:04:34 +01:00
ruff_formatter Switch to Rust 2024 edition (#18129) 2025-05-16 13:25:28 +02:00
ruff_graph Support .pyi files in ruff analyze graph (#19611) 2025-07-28 22:00:27 -04:00
ruff_index Update Rust toolchain to 1.88 and MSRV to 1.86 (#19011) 2025-06-28 20:24:00 +02:00
ruff_linter [ruff] Parenthesize generator expressions in f-strings (RUF010) (#19434) 2025-07-30 15:02:31 +00:00
ruff_macros [ty] Merge ty_macros into ruff_macros (#19229) 2025-07-09 11:28:21 +00:00
ruff_notebook Switch to Rust 2024 edition (#18129) 2025-05-16 13:25:28 +02:00
ruff_options_metadata [ty] Document configuration schema (#17950) 2025-05-09 10:47:45 +02:00
ruff_python_ast Disallow implicit concatenation of t-strings and other string types (#19485) 2025-07-27 12:41:03 +00:00
ruff_python_ast_integration_tests Disallow implicit concatenation of t-strings and other string types (#19485) 2025-07-27 12:41:03 +00:00
ruff_python_codegen Disallow implicit concatenation of t-strings and other string types (#19485) 2025-07-27 12:41:03 +00:00
ruff_python_formatter Disallow implicit concatenation of t-strings and other string types (#19485) 2025-07-27 12:41:03 +00:00
ruff_python_index Switch to Rust 2024 edition (#18129) 2025-05-16 13:25:28 +02:00
ruff_python_literal Switch to Rust 2024 edition (#18129) 2025-05-16 13:25:28 +02:00
ruff_python_parser Disallow implicit concatenation of t-strings and other string types (#19485) 2025-07-27 12:41:03 +00:00
ruff_python_semantic [ty] Make Module a Salsa ingredient 2025-07-23 09:46:40 -04:00
ruff_python_stdlib Switch to Rust 2024 edition (#18129) 2025-05-16 13:25:28 +02:00
ruff_python_trivia Treat ty: comments as pragma comments (#18532) 2025-06-07 16:02:43 +02:00
ruff_python_trivia_integration_tests Switch to Rust 2024 edition (#18129) 2025-05-16 13:25:28 +02:00
ruff_server Move fix suggestion to subdiagnostic (#19464) 2025-07-22 10:03:58 -04:00
ruff_source_file [ty] Implement diagnostic caching (#19605) 2025-07-30 11:04:34 +01:00
ruff_text_size [ty] Add environment variable to dump Salsa memory usage stats (#18928) 2025-06-26 21:27:51 +00:00
ruff_wasm Bump 0.12.7 (#19627) 2025-07-29 18:18:42 -04:00
ruff_workspace Add support for specifying minimum dots in detected string imports (#19538) 2025-07-24 15:48:23 -04:00
ty Move concise diagnostic rendering to ruff_db (#19398) 2025-07-23 11:43:32 -04:00
ty_ide [ty] Remove offset from CompletionTargetTokens::Unknown 2025-07-29 14:49:20 -04:00
ty_project [ty] Remove AssertUnwindSafe requirement from ProgressReporter (#19637) 2025-07-30 12:46:44 +00:00
ty_python_semantic [ty] Upcast heterogeneous and mixed tuples to homogeneous tuples where it's necessary to solve a TypeVar (#19635) 2025-07-30 17:12:21 +01:00
ty_server [ty] Fix server panic in workspace diagnostics request handler when typing (#19631) 2025-07-30 16:40:42 +01:00
ty_static [ty] Merge ty_macros into ruff_macros (#19229) 2025-07-09 11:28:21 +00:00
ty_test [ty] Track open files in the server (#19264) 2025-07-18 19:33:35 +05:30
ty_vendored [ty] Sync vendored typeshed stubs (#19607) 2025-07-28 22:06:33 +00:00
ty_wasm [ty] Support stdlib files in playground (#19557) 2025-07-26 19:33:38 +01:00