Swift: move IteratorProtocol model to its own file

Author: Robert Marsh

swift/ql/lib/codeql/swift/frameworks/StandardLibrary/IteratorProtocol.qll

@@ -0,0 +1,17 @@
+/**
+ * Provides models for the `IteratorProtocol` Swift protocol.
+ */
+
+private import codeql.swift.dataflow.ExternalFlow
+
+/**
+ * A model for `IteratorProtocol` members that permit taint flow.
+ */
+private class IteratorProtocolSummaries extends SummaryModelCsv {
+  override predicate row(string row) {
+    row =
+      [
+        ";IteratorProtocol;true;next();;;Argument[-1].CollectionElement;ReturnValue.OptionalSome;value"
+      ]
+  }
+}

swift/ql/lib/codeql/swift/frameworks/StandardLibrary/Sequence.qll

@@ -29,8 +29,7 @@ private class SequenceSummaries extends SummaryModelCsv {
         ";Sequence;true;withContiguousStorageIfAvailable(_:);;;Argument[-1].ArrayElement;Argument[0].Parameter[0].CollectionElement;value",
         ";Sequence;true;withContiguousStorageIfAvailable(_:);;;Argument[-1].CollectionElement;Argument[0].Parameter[0].CollectionElement;value",
         ";Sequence;true;withContiguousStorageIfAvailable(_:);;;Argument[0].ReturnValue;ReturnValue.OptionalSome;value",
-        ";Sequence;true;makeIterator();;;Argument[-1].CollectionElement;ReturnValue.CollectionElement;value",
-        ";IteratorProtocol;true;next();;;Argument[-1].CollectionElement;ReturnValue.OptionalSome;value"
+        ";Sequence;true;makeIterator();;;Argument[-1].CollectionElement;ReturnValue.CollectionElement;value"
       ]
   }
 }

swift/ql/lib/codeql/swift/frameworks/StandardLibrary/StandardLibrary.qll

@@ -9,6 +9,7 @@ private import Data
 private import FileManager
 private import FilePath
 private import InputStream
+private import IteratorProtocol
 private import ManualMemoryManagement
 private import NsData
 private import NsObject