started query builder

include/matador/utils/field_attributes.hpp

@@ -0,0 +1,34 @@
+#ifndef QUERY_FIELD_ATTRIBUTES_HPP
+#define QUERY_FIELD_ATTRIBUTES_HPP
+
+#include "constraints.hpp"
+
+#include <cstdlib>
+
+namespace matador::utils {
+
+class field_attributes
+{
+public:
+  field_attributes() = default;
+  field_attributes(size_t size); // NOLINT(*-explicit-constructor)
+  field_attributes(constraints options); // NOLINT(*-explicit-constructor)
+  field_attributes(size_t size, constraints options);
+  field_attributes(const field_attributes &x) = default;
+  field_attributes& operator=(const field_attributes &x) = default;
+  field_attributes(field_attributes &&x) = default;
+  field_attributes& operator=(field_attributes &&x) = default;
+  ~field_attributes() = default;
+
+  [[nodiscard]] size_t size() const;
+  [[nodiscard]] constraints options() const;
+
+private:
+  size_t size_ = 0;
+  constraints options_ = constraints::NONE;
+};
+
+const field_attributes null_attributes {};
+
+}
+#endif //QUERY_FIELD_ATTRIBUTES_HPP