# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1478818549 -3600
# Node ID ef09cc743496c527c82bfd455ff0cfb6390ef662
# Parent  d1d5987e9261e4a581b73020f2e963b28af4ac5f
Where references do not provide definitive origin details, introduce a
requirement for each module directly providing such references.

diff -r d1d5987e9261 -r ef09cc743496 importer.py
--- a/importer.py	Thu Nov 10 23:27:13 2016 +0100
+++ b/importer.py	Thu Nov 10 23:55:49 2016 +0100
@@ -410,11 +410,14 @@
                 # Record the resolved names and identify required modules.
 
                 else:
+                    # Find the providing module of this reference.
+                    # Where definitive details of the origin cannot be found,
+                    # identify the provider using the deferred reference.
+                    # NOTE: This may need to test for static origins.
+
+                    provider = self.get_module_provider(found.unresolved() and ref or found)
                     ref.mutate(found)
 
-                    # Find the providing module of this reference.
-
-                    provider = self.get_module_provider(ref)
                     if provider:
 
                         module.required.add(provider)
diff -r d1d5987e9261 -r ef09cc743496 referencing.py
--- a/referencing.py	Thu Nov 10 23:27:13 2016 +0100
+++ b/referencing.py	Thu Nov 10 23:55:49 2016 +0100
@@ -90,7 +90,8 @@
         """
         Return whether the reference describes an object from the given 'kinds',
         where such kinds may be "<class>", "<function>", "<instance>",
-        "<module>" or "<var>".
+        "<module>" or "<var>". Unresolved references may also have kinds of
+        "<depends>" and "<invoke>".
         """
 
         if not isinstance(kinds, (list, tuple)):
@@ -103,6 +104,12 @@
 
         return self.get_origin().split(".")
 
+    def unresolved(self):
+
+        "Return whether this reference is unresolved."
+
+        return self.has_kind(["<depends>", "<invoke>"])
+
     def static(self):
 
         "Return this reference if it refers to a static object, None otherwise."