Method kind_case

common/expr.h:1423–1429

}

inline ExprKindCase Expr::kind_case() const {
  static_assert(absl::variant_size_v<ExprKind> == 9);
  if (kind_.index() <= 9) {
    return static_cast<ExprKindCase>(kind_.index());
  }
  return ExprKindCase::kUnspecifiedExpr;
}

inline void swap(Expr& lhs, Expr& rhs) noexcept {
  using std::swap;