Element can accept values so we can build flat arrays

That is arrays which do not contain hashes

Author: jnicklas

lib/serial/array_builder.rb

@@ -20,8 +20,14 @@ def initialize(context)
     #
     # @yield [builder]
     # @yieldparam builder [HashBuilder]
-    def element(&block)
-      @data << HashBuilder.build(@context, &block)
+    def element(value = :__not_used__, &block)
+      if value == :__not_used__
+        @data << HashBuilder.build(@context, &block)
+      elsif not block
+        @data << value
+      else
+        raise ArgumentError, "cannot pass both a block and an argument to `element`"
+      end
     end
 
     # @api public

spec/serial/dsl_spec.rb

@@ -197,6 +197,25 @@ def collection(&block)
           ]
         })
       end
+
+      it "accepts a value" do
+        data = collection do |l|
+          l.element("hello")
+          l.element("world")
+        end
+
+        expect(data).to eq({
+          "collection" => ["hello", "world"]
+        })
+      end
+
+      it "raises an error when both block and value given" do
+        expect do
+          collection do |l|
+            l.element("hello") { |h| h.attribute(:foo, "bar") }
+          end
+        end.to raise_error(ArgumentError, "cannot pass both a block and an argument to `element`")
+      end
     end
 
     describe "#collection" do