contract C {
    struct S { bool f; }
    S s;
    function f(uint256 a) internal pure returns (S storage c) {
        assembly {
            switch a
            default { c_slot := s_slot }
        }
    }
    function g(bool flag) internal pure returns (S storage c) {
        assembly {
            switch flag
            case 0 { c_slot := s_slot }
            default { c_slot := s_slot }
        }
    }
    function h(uint256 a) internal pure returns (S storage c) {
        assembly {
            switch a
            case 0 { revert(0, 0) }
            default { c_slot := s_slot }
        }
    }
}
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