clear.rb in sparql-3.2.0

- old
+ new

@@ -4,13 +4,18 @@
     ##
     # The SPARQL UPDATE `clear` operator.
     #
     # The CLEAR operation removes all the triples in the specified graph(s) in the Graph Store.
     #
-    # @example
-    #   (clear silent default)
+    # [32]  Clear                   ::= 'CLEAR' 'SILENT'? GraphRefAll
     #
+    # @example SPARQL Grammar
+    #   CLEAR SILENT DEFAULT
+    #
+    # @example SSE
+    #   (update (clear silent default))
+    #
     # @see https://www.w3.org/TR/sparql11-update/#clear
     class Clear < Operator
       include SPARQL::Algebra::Update
 
       NAME = [:clear]
@@ -55,9 +60,18 @@
         else
           raise ArgumentError, "clear expected operand to be 'default', 'named', 'all', or an IRI" 
         end
 
         queryable
+      end
+
+      ##
+      #
+      # Returns a partial SPARQL grammar for this operator.
+      #
+      # @return [String]
+      def to_sparql(**options)
+        "CLEAR " + operands.to_sparql(**options)
       end
     end # Clear
   end # Operator
 end; end # SPARQL::Algebra