Replace all uses of Enum.empty? with the dedicated empty? functions

lib/rdf/dataset.ex

@@ -319,7 +319,7 @@ defmodule RDF.Dataset do
       %__MODULE__{
         dataset
         | graphs:
-            if Enum.empty?(new_graph) do
+            if Graph.empty?(new_graph) do
               Map.delete(dataset.graphs, graph_name)
             else
               Map.put(dataset.graphs, graph_name, new_graph)
@@ -475,7 +475,7 @@ defmodule RDF.Dataset do
     {{s, p, o}, popped_graph} = Graph.pop(graph)
 
     popped =
-      if Enum.empty?(popped_graph),
+      if Graph.empty?(popped_graph),
         do: graphs |> Map.delete(graph_name),
         else: graphs |> Map.put(graph_name, popped_graph)
 

lib/rdf/diff.ex

@@ -33,7 +33,7 @@ defmodule RDF.Diff do
   defp coerce_graph(nil), do: Graph.new()
 
   defp coerce_graph(%Description{} = description),
-    do: if(Enum.empty?(description), do: Graph.new(), else: Graph.new(description))
+    do: if(Description.empty?(description), do: Graph.new(), else: Graph.new(description))
 
   defp coerce_graph(data), do: Graph.new(init: data)
 

lib/rdf/graph.ex

@@ -196,7 +196,7 @@ defmodule RDF.Graph do
   def add(graph, input, opts \\ [])
 
   def add(%__MODULE__{descriptions: descriptions} = graph, %Description{} = description, opts) do
-    if Enum.empty?(description) do
+    if Description.empty?(description) do
       graph
     else
       %__MODULE__{
@@ -430,7 +430,7 @@ defmodule RDF.Graph do
       %__MODULE__{
         graph
         | descriptions:
-            if Enum.empty?(new_description) do
+            if Description.empty?(new_description) do
               Map.delete(descriptions, subject)
             else
               Map.put(descriptions, subject, new_description)
@@ -739,7 +739,7 @@ defmodule RDF.Graph do
     {triple, popped_description} = Description.pop(description)
 
     popped =
-      if Enum.empty?(popped_description),
+      if Description.empty?(popped_description),
         do: descriptions |> Map.delete(subject),
         else: descriptions |> Map.put(subject, popped_description)
 

lib/rdf/inspect.ex

@@ -32,7 +32,7 @@ defimpl Inspect, for: RDF.Description do
 
         header = "#RDF.Description<subject: #{inspect(description.subject)}"
 
-        if Enum.empty?(description) do
+        if RDF.Description.empty?(description) do
           header <> ">"
         else
           body =

lib/rdf/serializations/turtle_encoder.ex

@@ -253,7 +253,7 @@ defmodule RDF.Turtle.Encoder do
   defp blank_node_property_list(description, state, nesting) do
     indented = nesting + @indentation
 
-    if Enum.empty?(description) do
+    if Description.empty?(description) do
       "[]"
     else
       "[" <>
@@ -348,7 +348,7 @@ defmodule RDF.Turtle.Encoder do
   defp list_subject_description(description) do
     description = Description.delete_predicates(description, [RDF.first(), RDF.rest()])
 
-    if Enum.count(description.predications) == 0 do
+    if Description.empty?(description) do
       # since the Turtle grammar doesn't allow bare lists, we add a statement
       description |> RDF.type(RDF.List)
     else

lib/rdf/star/graph.ex

@@ -73,7 +73,7 @@ defmodule RDF.Star.Graph do
               description_without_quoted_triples =
                 Description.without_quoted_triple_objects(description)
 
-              if Enum.empty?(description_without_quoted_triples) do
+              if Description.empty?(description_without_quoted_triples) do
                 Map.delete(descriptions, subject)
               else
                 Map.put(descriptions, subject, description_without_quoted_triples)