Check line ranges on local macros.

data/tools/macroscope

@@ -195,8 +195,7 @@ class CrossRef:
             defn = self.fileref[defn]
         if defn.undef != None:
             # Local macros are only visible in the file where they were defined
-            # FIXME: we should check line spans here.
-            return defn.filename == fn
+            return defn.filename == fn and n >= defn.lineno and n <= defn.undef
         elif defn.filename in self.filelist.forest[0]:
             # Macros in the first subtree are visible everywhere.
             return True
@@ -316,6 +315,7 @@ class CrossRef:
                     # Find references to resource files
                     for match in re.finditer(CrossRef.file_reference, line):
                         name = match.group(0)
+                        # Catches maps that look like macro names.
                         if name.endswith(".map") and name[0] == '{':
                             name = name[1:]
                         key = None