Displace ASTNodeDataVariant in its own file

src/language/ASTNode.hpp

@@ -5,6 +5,7 @@
 #include <PugsMacros.hpp>
 
 #include <ASTNodeDataType.hpp>
+#include <ASTNodeDataVariant.hpp>
 
 #include <pegtl/contrib/parse_tree.hpp>
 

src/language/ASTNodeDataType.hpp

-#ifndef AST_NODE_DATATYPE_HPP
-#define AST_NODE_DATATYPE_HPP
+#ifndef AST_NODE_DATA_TYPE_HPP
+#define AST_NODE_DATA_TYPE_HPP
 
 #include <string>
-#include <variant>
 
 enum class ASTNodeDataType
 {
@@ -20,6 +19,4 @@ std::string dataTypeName(const ASTNodeDataType& data_type);
 
 ASTNodeDataType dataTypePromotion(const ASTNodeDataType& data_type_1, const ASTNodeDataType& data_type_2);
 
-using ASTNodeDataVariant = std::variant<std::monostate, bool, uint64_t, int64_t, double, std::string>;
-
-#endif   // AST_NODE_DATATYPE_HPP
+#endif   // AST_NODE_DATA_TYPE_HPP

src/language/ASTNodeDataVariant.hpp

+#ifndef AST_NODE_DATA_VARIANT_HPP
+#define AST_NODE_DATA_VARIANT_HPP
+
+#include <variant>
+
+using ASTNodeDataVariant = std::variant<std::monostate, bool, uint64_t, int64_t, double, std::string>;
+
+#endif // AST_NODE_DATA_VARIANT_HPP