Added thirdparty: boost library

thirdparty/include/boost/mysql/field_kind.hpp

@@ -0,0 +1,71 @@
+//
+// Copyright (c) 2019-2023 Ruben Perez Hidalgo (rubenperez038 at gmail dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef BOOST_MYSQL_FIELD_KIND_HPP
+#define BOOST_MYSQL_FIELD_KIND_HPP
+
+#include <boost/mysql/detail/config.hpp>
+
+#include <iosfwd>
+
+namespace boost {
+namespace mysql {
+
+/**
+ * \brief Represents the possible C++ types a `field` or `field_view` may have.
+ */
+enum class field_kind
+{
+    // Order here is important
+
+    /// Any of the below when the value is NULL
+    null = 0,
+
+    /// The field contains a `std::int64_t`.
+    int64,
+
+    /// The field contains a `std::uint64_t`.
+    uint64,
+
+    /// The field contains a string (`std::string` for `field` and `string_view` for
+    /// `field_view`).
+    string,
+
+    /// The field contains a binary string (\ref blob for `field` and \ref blob_view for
+    /// `field_view`).
+    blob,
+
+    /// The field contains a `float`.
+    float_,
+
+    /// The field contains a `double`.
+    double_,
+
+    /// The field contains a \ref date.
+    date,
+
+    /// The field contains a \ref datetime.
+    datetime,
+
+    /// The field contains a \ref time.
+    time
+};
+
+/**
+ * \brief Streams a field_kind.
+ */
+BOOST_MYSQL_DECL
+std::ostream& operator<<(std::ostream& os, field_kind v);
+
+}  // namespace mysql
+}  // namespace boost
+
+#ifdef BOOST_MYSQL_HEADER_ONLY
+#include <boost/mysql/impl/field_kind.ipp>
+#endif
+
+#endif