core: plain Literal sigil

lib/rdf/sigils.ex

@@ -12,7 +12,33 @@ defmodule RDF.Sigils do
       RDF.uri("http://example.com")
 
   """
-  defmacro sigil_I({:<<>>, _, [iri]}, []) when is_binary(iri),
-    do: Macro.escape(RDF.uri(iri))
+  defmacro sigil_I({:<<>>, _, [iri]}, []) when is_binary(iri) do
+    Macro.escape(RDF.uri(iri))
+  end
 
+  @doc ~S"""
+  Handles the sigil `~L` for plain Literals.
+
+  The sigil modifier can be used to specify a language tag.
+
+  Note: Languages with subtags are not supported.
+
+  ## Examples
+
+      iex> import RDF.Sigils
+      iex> ~L"foo"
+      RDF.literal("foo")
+      iex> ~L"foo"en
+      RDF.literal("foo", language: "en")
+
+  """
+  defmacro sigil_L(value, language)
+
+  defmacro sigil_L({:<<>>, _, [value]}, []) when is_binary(value) do
+    Macro.escape(RDF.Literal.new(value))
+  end
+
+  defmacro sigil_L({:<<>>, _, [value]}, language) when is_binary(value) do
+    Macro.escape(RDF.Literal.new(value, %{language: to_string(language)}))
+  end
 end

test/unit/sigils_test.exs

@@ -6,11 +6,19 @@ defmodule RDF.SigilsTest do
   doctest RDF.Sigils
 
   describe "IRI sigil without interpolation" do
-
-    test "it can create a URI struct from a sigil" do
+    test "creating an URI" do
       assert ~I<http://example.com> == RDF.uri("http://example.com")
     end
+  end
 
+  describe "Literal sigil without interpolation" do
+    test "creating a plain Literal" do
+      assert ~L"foo" == RDF.literal("foo")
+    end
+
+    test "creating a language-tagged Literal" do
+      assert ~L"foo"en == RDF.literal("foo", language: "en")
+    end
   end
 
 end