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Prohibits anonymous structs or unions nested directly inside struct definitions, including multi-level nesting. Nested structs remain compliant when they are given explicit member names.

Prohibits multiple related function calls in the same expression when one call can affect the value observed by another. Separating the calls into distinct statements keeps evaluation order explicit.

Requires parentheses when arithmetic or bitwise operations are mixed with comparison operators so evaluation order stays explicit. Expressions such as `(x & y) == z` are compliant, while `x & y == z` is not.

Prohibits using assignment expressions directly inside conditions such as `if`, `while`, `do-while`, and `for`. Assignments must be separated from the boolean check to avoid confusing `=` with `==`.