Class CaseBuilder<DB, TB, W, O>

new CaseBuilder<DB, TB extends string | number | symbol, W = unknown, O = never>(
    props: CaseBuilderProps,
): CaseBuilder<DB, TB, W, O>

when<
    RE extends
        | string
        | Expression<any>
        | DynamicReferenceBuilder<any>
        | SelectQueryBuilderExpression<Record<string, any>>
        | OperandExpressionFactory<DB, TB, any>,
    VE extends any,
>(
    lhs: unknown extends W
        ? RE
        : KyselyTypeError<
            "when(lhs, op, rhs) is not supported when using case(value)",
        >,
    op: ComparisonOperatorExpression,
    rhs: VE,
): CaseThenBuilder<DB, TB, W, O>

when(expression: Expression<W>): CaseThenBuilder<DB, TB, W, O>

when(
    value: unknown extends W
        ? KyselyTypeError<
            "when(value) is only supported when using case(value)",
        >
        : W,
): CaseThenBuilder<DB, TB, W, O>