Prevent self-autoloading

lib/dry/struct/class_interface.rb

@@ -426,6 +426,12 @@ def build_type(name, type, &block)
         end
       end
       private :build_type
+
+      # @api private
+      # @return [Boolean]
+      def value?
+        false
+      end
     end
   end
 end

lib/dry/struct/struct_builder.rb

@@ -43,11 +43,7 @@ def parent(type)
       end
 
       def default_superclass
-        if defined? ::Dry::Struct::Value
-          struct < Value ? Value : Struct
-        else
-          Struct
-        end
+        struct.value? ? Value : Struct
       end
 
       def const_name(type, attr_name)

lib/dry/struct/value.rb

@@ -29,6 +29,12 @@ class Value < self
       def self.new(*)
         ::IceNine.deep_freeze(super)
       end
+
+      # @api private
+      # @return [Boolean]
+      def self.value?
+        true
+      end
     end
 
     deprecate_constant :Value