lib/fear/struct.rb in fear-1.1.0 vs lib/fear/struct.rb in fear-1.2.0

@@ -190,10 +190,11 @@
     def ==(other)
       other.is_a?(other.class) && to_h == other.to_h
     end
 
     INSPECT_TEMPLATE = "<#Fear::Struct %{class_name} %{attributes}>"
+    private_constant :INSPECT_TEMPLATE
 
     # @return [String]
     #
     # @example
     #   User = Fear::Struct.with_attributes(:id, :email)
@@ -206,20 +207,22 @@
       format(INSPECT_TEMPLATE, class_name: self.class.name, attributes: attributes)
     end
     alias to_s inspect
 
     MISSING_KEYWORDS_ERROR = "missing keywords: %{keywords}"
+    private_constant :MISSING_KEYWORDS_ERROR
 
     private def _check_missing_attributes!(provided_attributes)
       missing_attributes = members - provided_attributes.keys
 
       unless missing_attributes.empty?
         raise ArgumentError, format(MISSING_KEYWORDS_ERROR, keywords: missing_attributes.join(", "))
       end
     end
 
     UNKNOWN_KEYWORDS_ERROR = "unknown keywords: %{keywords}"
+    private_constant :UNKNOWN_KEYWORDS_ERROR
 
     private def _check_unknown_attributes!(provided_attributes)
       unknown_attributes = provided_attributes.keys - members
 
       unless unknown_attributes.empty?
@@ -228,8 +231,18 @@
     end
 
     # @return [void]
     private def _set_attribute(name, value)
       instance_variable_set(:"@#{name}", value)
+    end
+
+    # @param keys [Hash, nil]
+    # @return [Hash]
+    def deconstruct_keys(keys)
+      if keys
+        to_h.slice(*(self.class.attributes & keys))
+      else
+        to_h
+      end
     end
   end
 end