Add STRING_ANY_MAP.

include/string_any_map.h

@@ -0,0 +1,115 @@
+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2023 Alex Shvartzkop <dudesuchamazing@gmail.com>
+ * Copyright (C) 2023 KiCad Developers, see AUTHORS.txt for contributors.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef STRING_ANY_MAP_H_
+#define STRING_ANY_MAP_H_
+
+#include <string>
+#include <map>
+#include <optional>
+
+#include <wx/any.h>
+
+
+/**
+ * A name/value tuple with unique names and wxAny values.  The names
+ * may be iterated alphabetically.
+ */
+class STRING_ANY_MAP : public std::map<std::string, wxAny>
+{
+    double m_iuScale;
+
+public:
+
+    STRING_ANY_MAP( double aIUScale = 1.0 ) : m_iuScale( aIUScale ) {}
+
+    template <typename T>
+    bool get_to( const std::string& aKey, T& aVar ) const
+    {
+        if( !contains( aKey ) )
+            return false;
+
+        return at( aKey ).GetAs( &aVar );
+    }
+
+    template <typename T>
+    bool get_to_iu( const std::string& aKey, T& aVar ) const
+    {
+        if( !contains( aKey ) )
+            return false;
+
+        const wxAny& value = at( aKey );
+
+        if( value.CheckType<double>() || value.CheckType<int>() || value.CheckType<long>()
+            || value.CheckType<long long>() )
+        {
+            double number;
+
+            if( !value.GetAs( &number ) )
+                return false;
+
+            number *= m_iuScale;
+            aVar = number;
+        }
+        else
+        {
+            if( !value.GetAs( &aVar ) )
+                return false;
+        }
+
+        return true;
+    }
+
+    template <typename T>
+    void set( const std::string& aKey, const T& aVar )
+    {
+        emplace( aKey, aVar );
+    }
+
+    template <typename T>
+    void set_iu( const std::string& aKey, const T& aVar)
+    {
+        emplace( aKey, aVar / m_iuScale );
+    }
+
+    bool contains( const std::string& aKey ) const
+    { //
+        return find( aKey ) != end();
+    }
+
+    template <typename T>
+    std::optional<T> get_opt( const std::string& aKey ) const
+    {
+        if( contains( aKey ) )
+        {
+            T val;
+
+            if( !at( aKey ).GetAs( &val ) )
+                return std::nullopt;
+
+            return val;
+        }
+
+        return std::nullopt;
+    }
+};
+
+
+#endif // STRING_ANY_MAP_H_