core: blank node sigil

lib/rdf/sigils.ex

@@ -16,6 +16,21 @@ defmodule RDF.Sigils do
     Macro.escape(RDF.uri(iri))
   end
 
+  @doc ~S"""
+  Handles the sigil `~B` for blank nodes.
+
+  ## Examples
+
+      iex> import RDF.Sigils
+      iex> ~B<foo>
+      RDF.bnode("foo")
+
+  """
+  defmacro sigil_B({:<<>>, _, [bnode]}, []) when is_binary(bnode) do
+    Macro.escape(RDF.BlankNode.new(bnode))
+  end
+
+
   @doc ~S"""
   Handles the sigil `~L` for plain Literals.
 

test/unit/sigils_test.exs

@@ -11,6 +11,12 @@ defmodule RDF.SigilsTest do
     end
   end
 
+  describe "Blank node sigil without interpolation" do
+    test "creating a blank node" do
+      assert ~B<foo> == RDF.bnode("foo")
+    end
+  end
+
   describe "Literal sigil without interpolation" do
     test "creating a plain Literal" do
       assert ~L"foo" == RDF.literal("foo")