Added thirdparty: boost library

thirdparty/include/boost/describe/enum_from_string.hpp

@@ -0,0 +1,77 @@
+#ifndef BOOST_DESCRIBE_ENUM_FROM_STRING_HPP_INCLUDED
+#define BOOST_DESCRIBE_ENUM_FROM_STRING_HPP_INCLUDED
+
+// Copyright 2020, 2021 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/describe/detail/config.hpp>
+
+#if defined(BOOST_DESCRIBE_CXX14)
+
+#include <boost/describe/enumerators.hpp>
+#include <boost/mp11/algorithm.hpp>
+#include <cstring>
+#include <type_traits>
+
+#if defined(_MSC_VER) && _MSC_VER == 1900
+# pragma warning(push)
+# pragma warning(disable: 4100) // unreferenced formal parameter
+#endif
+
+namespace boost
+{
+namespace describe
+{
+
+template<class E, class De = describe_enumerators<E>>
+bool enum_from_string( char const* name, E& e ) noexcept
+{
+    bool found = false;
+
+    mp11::mp_for_each<De>([&](auto D){
+
+        if( !found && std::strcmp( D.name, name ) == 0 )
+        {
+            found = true;
+            e = D.value;
+        }
+
+    });
+
+    return found;
+}
+
+template<class S, class E, class De = describe_enumerators<E>,
+    class En = std::enable_if_t<
+        std::is_same<typename S::value_type, char>::value &&
+        std::is_same<typename S::traits_type::char_type, char>::value
+    >
+>
+bool enum_from_string( S const& name, E& e ) noexcept
+{
+    bool found = false;
+
+    mp11::mp_for_each<De>([&](auto D){
+
+        if( !found && name == D.name )
+        {
+            found = true;
+            e = D.value;
+        }
+
+    });
+
+    return found;
+}
+
+} // namespace describe
+} // namespace boost
+
+#if defined(_MSC_VER) && _MSC_VER == 1900
+# pragma warning(pop)
+#endif
+
+#endif // defined(BOOST_DESCRIBE_CXX14)
+
+#endif // #ifndef BOOST_DESCRIBE_ENUM_FROM_STRING_HPP_INCLUDED