Emit `redundant-expr` warnings for if statements that are always true or always false.#20068

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tyralla wants to merge 16 commits intopython:masterfrom

tyralla:fix/redundant_expr_for_if

Commits on Oct 14, 2025

Emit `redundant-expr` warnings for if statements that are always true or always false.
tyralla
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The same for while statements, but only for always false.
tyralla
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Commits on Oct 15, 2025

Do not emit `redundant-expr` warnings for `if TYPE_CHECKING` statements.
tyralla
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Use `refers_to_fullname` to detect TYPE_CHECKING` usages.
tyralla
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Commits on Oct 16, 2025

Commits on Oct 17, 2025

Commits on Oct 21, 2025

Check for missing reachability of the (theoretical) else body instead of just asking whether the if body's first statement is a return statement.
tyralla
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