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ruff/crates/ty_python_semantic/resources/mdtest/scopes/builtin.md
David Peter 21303d1a02
[ty] Minor change to builtins.md test (#18889) 
## Summary

As far as I can tell, the two existing tests did the exact same thing.
Remove the redundant test, and add tests for all combinations of
declared/not-declared and local/"public" use of the name.

Proposing this as a separate PR before the behavior might change via
https://github.com/astral-sh/ruff/pull/18750
2025-06-23 12:32:50 +02:00

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Builtin scope

Conditional local override of builtin

If a builtin name is conditionally shadowed by a local variable, a name lookup should union the builtin type with the conditionally-defined type:

def _(flag: bool) -> None:
    if flag:
        abs = 1
        chr: int = 1

    reveal_type(abs)  # revealed: Literal[1] | (def abs(x: SupportsAbs[_T], /) -> _T)
    reveal_type(chr)  # revealed: Literal[1] | (def chr(i: SupportsIndex, /) -> str)

Conditionally global override of builtin

If a builtin name is conditionally shadowed by a global variable, a name lookup should union the builtin type with the conditionally-defined type:

def flag() -> bool:
    return True

if flag():
    abs = 1
    chr: int = 1

def _():
    reveal_type(abs)  # revealed: Unknown | Literal[1] | (def abs(x: SupportsAbs[_T], /) -> _T)
    reveal_type(chr)  # revealed: int | (def chr(i: SupportsIndex, /) -> str)