Address review comments

rust/ql/lib/codeql/rust/dataflow/FlowSummary.qll

@@ -2,13 +2,13 @@
 
 private import rust
 private import internal.FlowSummaryImpl as Impl
-private import internal.DataFlowImpl
+private import codeql.rust.elements.internal.CallExprBaseImpl::Impl as CallExprBaseImpl
 
 // import all instances below
 private module Summaries {
   private import codeql.rust.Frameworks
 
-  // TODO: Used models-as-data when it's available
+  // TODO: Use models-as-data when it's available
   private class UnwrapSummary extends SummarizedCallable::Range {
     UnwrapSummary() { this = "lang:core::_::<crate::option::Option>::unwrap" }
 
@@ -30,7 +30,7 @@ module LibraryCallable {
     /** Gets a call to this library callable. */
     CallExprBase getACall() {
       exists(Resolvable r, string crate |
-        r = getCallResolvable(result) and
+        r = CallExprBaseImpl::getCallResolvable(result) and
         this = crate + r.getResolvedPath()
       |
         crate = r.getResolvedCrateOrigin() + "::_::"

rust/ql/lib/codeql/rust/dataflow/internal/DataFlowImpl.qll

@@ -173,7 +173,7 @@ module Node {
     override Location getLocation() { none() }
   }
 
-  /** A data-flow node used to model flow summaries. */
+  /** A data flow node used to model flow summaries. */
   class FlowSummaryNode extends Node, TFlowSummaryNode {
     FlowSummaryImpl::Private::SummaryNode getSummaryNode() { this = TFlowSummaryNode(result) }
 
@@ -375,10 +375,6 @@ module Node {
     /** Gets the node before the state update. */
     abstract Node getPreUpdateNode();
 
-    override CfgScope getCfgScope() { result = this.getPreUpdateNode().getCfgScope() }
-
-    override Location getLocation() { result = this.getPreUpdateNode().getLocation() }
-
     override string toString() { result = "[post] " + this.getPreUpdateNode().toString() }
   }
 
@@ -388,6 +384,10 @@ module Node {
     ExprPostUpdateNode() { this = TExprPostUpdateNode(n) }
 
     override Node getPreUpdateNode() { result = TExprNode(n) }
+
+    override CfgScope getCfgScope() { result = n.getScope() }
+
+    override Location getLocation() { result = n.getLocation() }
   }
 
   final class SummaryPostUpdateNode extends FlowSummaryNode, PostUpdateNode {
@@ -399,10 +399,6 @@ module Node {
 
     override Node getPreUpdateNode() { result = pre }
 
-    override CfgScope getCfgScope() { result = PostUpdateNode.super.getCfgScope() }
-
-    override EmptyLocation getLocation() { result = PostUpdateNode.super.getLocation() }
-
     final override string toString() { result = PostUpdateNode.super.toString() }
   }
 
@@ -689,13 +685,6 @@ private module Aliases {
   class ContentSetAlias = ContentSet;
 }
 
-pragma[nomagic]
-Resolvable getCallResolvable(CallExprBase call) {
-  result = call.(MethodCallExpr)
-  or
-  result = call.(CallExpr).getFunction().(PathExpr).getPath()
-}
-
 module RustDataFlow implements InputSig<Location> {
   private import Aliases
 

rust/ql/lib/codeql/rust/dataflow/internal/FlowSummaryImpl.qll

@@ -15,12 +15,7 @@ module Input implements InputSig<Location, RustDataFlow> {
 
   ReturnKind getStandardReturnValueKind() { result = TNormalReturnKind() }
 
-  string encodeParameterPosition(ParameterPosition pos) {
-    result = pos.getPosition().toString()
-    or
-    pos.isSelf() and
-    result = "self"
-  }
+  string encodeParameterPosition(ParameterPosition pos) { result = pos.toString() }
 
   predicate encodeArgumentPosition = encodeParameterPosition/1;
 

rust/ql/lib/codeql/rust/elements/internal/CallExprBaseImpl.qll

@@ -17,7 +17,7 @@ module Impl {
   private import codeql.rust.elements.internal.PathExprImpl::Impl
 
   pragma[nomagic]
-  private Resolvable getCallResolvable(CallExprBase call) {
+  Resolvable getCallResolvable(CallExprBase call) {
     result = call.(MethodCallExpr)
     or
     result = call.(CallExpr).getFunction().(PathExpr).getPath()