rename 'overlay[caller]' => 'overlay[caller?]'

java/ql/lib/semmle/code/java/Type.qll

@@ -670,7 +670,7 @@ class RefType extends Type, Annotatable, Modifiable, @reftype {
    *
    * For the definition of the notion of *erasure* see JLS v8, section 4.6 (Type Erasure).
    */
-  overlay[caller]
+  overlay[caller?]
   pragma[inline]
   RefType commonSubtype(RefType other) {
     result.getASourceSupertype*() = erase(this) and
@@ -1260,7 +1260,7 @@ private Type erase(Type t) {
  *
  * For the definition of the notion of *erasure* see JLS v8, section 4.6 (Type Erasure).
  */
-overlay[caller]
+overlay[caller?]
 pragma[inline]
 predicate haveIntersection(RefType t1, RefType t2) {
   exists(RefType e1, RefType e2 | e1 = erase(t1) and e2 = erase(t2) |

java/ql/lib/semmle/code/java/controlflow/Dominance.qll

@@ -95,7 +95,7 @@ predicate iDominates(ControlFlowNode dominator, ControlFlowNode node) {
 }
 
 /** Holds if `dom` strictly dominates `node`. */
-overlay[caller]
+overlay[caller?]
 pragma[inline]
 predicate strictlyDominates(ControlFlowNode dom, ControlFlowNode node) {
   // This predicate is gigantic, so it must be inlined.
@@ -105,7 +105,7 @@ predicate strictlyDominates(ControlFlowNode dom, ControlFlowNode node) {
 }
 
 /** Holds if `dom` dominates `node`. (This is reflexive.) */
-overlay[caller]
+overlay[caller?]
 pragma[inline]
 predicate dominates(ControlFlowNode dom, ControlFlowNode node) {
   // This predicate is gigantic, so it must be inlined.
@@ -115,7 +115,7 @@ predicate dominates(ControlFlowNode dom, ControlFlowNode node) {
 }
 
 /** Holds if `dom` strictly post-dominates `node`. */
-overlay[caller]
+overlay[caller?]
 pragma[inline]
 predicate strictlyPostDominates(ControlFlowNode dom, ControlFlowNode node) {
   // This predicate is gigantic, so it must be inlined.
@@ -125,7 +125,7 @@ predicate strictlyPostDominates(ControlFlowNode dom, ControlFlowNode node) {
 }
 
 /** Holds if `dom` post-dominates `node`. (This is reflexive.) */
-overlay[caller]
+overlay[caller?]
 pragma[inline]
 predicate postDominates(ControlFlowNode dom, ControlFlowNode node) {
   // This predicate is gigantic, so it must be inlined.

java/ql/lib/semmle/code/java/dataflow/internal/DataFlowDispatch.qll

@@ -213,7 +213,7 @@ private module DispatchImpl {
   }
 
   /** Holds if arguments at position `apos` match parameters at position `ppos`. */
-  overlay[caller]
+  overlay[caller?]
   pragma[inline]
   predicate parameterMatch(ParameterPosition ppos, ArgumentPosition apos) { ppos = apos }
 }

java/ql/lib/semmle/code/java/dataflow/internal/DataFlowUtil.qll

@@ -79,7 +79,7 @@ private module ThisFlow {
  * Holds if data can flow from `node1` to `node2` in zero or more
  * local (intra-procedural) steps.
  */
-overlay[caller]
+overlay[caller?]
 pragma[inline]
 predicate localFlow(Node node1, Node node2) { node1 = node2 or localFlowStepPlus(node1, node2) }
 
@@ -89,7 +89,7 @@ private predicate localFlowStepPlus(Node node1, Node node2) = fastTC(localFlowSt
  * Holds if data can flow from `e1` to `e2` in zero or more
  * local (intra-procedural) steps.
  */
-overlay[caller]
+overlay[caller?]
 pragma[inline]
 predicate localExprFlow(Expr e1, Expr e2) { localFlow(exprNode(e1), exprNode(e2)) }
 

java/ql/lib/semmle/code/java/dataflow/internal/TaintTrackingUtil.qll

@@ -23,7 +23,7 @@ private import semmle.code.java.frameworks.JaxWS
  * Holds if taint can flow from `src` to `sink` in zero or more
  * local (intra-procedural) steps.
  */
-overlay[caller]
+overlay[caller?]
 pragma[inline]
 predicate localTaint(DataFlow::Node src, DataFlow::Node sink) { localTaintStep*(src, sink) }
 
@@ -31,7 +31,7 @@ predicate localTaint(DataFlow::Node src, DataFlow::Node sink) { localTaintStep*(
  * Holds if taint can flow from `src` to `sink` in zero or more
  * local (intra-procedural) steps.
  */
-overlay[caller]
+overlay[caller?]
 pragma[inline]
 predicate localExprTaint(Expr src, Expr sink) {
   localTaint(DataFlow::exprNode(src), DataFlow::exprNode(sink))
@@ -74,7 +74,7 @@ module LocalTaintFlow<nodeSig/1 source, nodeSig/1 sink> {
    * (intra-procedural) steps that are restricted to be part of a path between
    * `source` and `sink`.
    */
-  overlay[caller]
+  overlay[caller?]
   pragma[inline]
   predicate hasFlow(DataFlow::Node n1, DataFlow::Node n2) { step*(n1, n2) }
 
@@ -83,7 +83,7 @@ module LocalTaintFlow<nodeSig/1 source, nodeSig/1 sink> {
    * (intra-procedural) steps that are restricted to be part of a path between
    * `source` and `sink`.
    */
-  overlay[caller]
+  overlay[caller?]
   pragma[inline]
   predicate hasExprFlow(Expr n1, Expr n2) {
     hasFlow(DataFlow::exprNode(n1), DataFlow::exprNode(n2))

shared/dataflow/codeql/dataflow/internal/DataFlowImpl.qll

@@ -744,7 +744,7 @@ module MakeImpl<LocationSig Location, InputSig<Location> Lang> {
             viableImplNotCallContextReducedInlineLate(call, outercc)
           }
 
-          overlay[caller]
+          overlay[caller?]
           pragma[inline]
           private predicate fwdFlowInCand(
             Call call, ArgNd arg, Cc outercc, Callable inner, ParamNd p, SummaryCtx summaryCtx,
@@ -759,7 +759,7 @@ module MakeImpl<LocationSig Location, InputSig<Location> Lang> {
             callEdgeArgParamRestrictedInlineLate(call, inner, arg, p, emptyAp)
           }
 
-          overlay[caller]
+          overlay[caller?]
           pragma[inline]
           private predicate fwdFlowInCandTypeFlowDisabled(
             Call call, ArgNd arg, Cc outercc, Callable inner, ParamNd p, SummaryCtx summaryCtx,
@@ -796,7 +796,7 @@ module MakeImpl<LocationSig Location, InputSig<Location> Lang> {
             innercc = getCallContextCall(call, inner)
           }
 
-          overlay[caller]
+          overlay[caller?]
           pragma[inline]
           predicate fwdFlowIn(
             Call call, ArgNd arg, Callable inner, ParamNd p, Cc outercc, CcCall innercc,
@@ -2326,7 +2326,7 @@ module MakeImpl<LocationSig Location, InputSig<Location> Lang> {
                * For more information, see
                * [Locations](https://codeql.github.com/docs/writing-codeql-queries/providing-locations-in-codeql-queries/).
                */
-              overlay[caller]
+              overlay[caller?]
               pragma[inline]
               deprecated final predicate hasLocationInfo(
                 string filepath, int startline, int startcolumn, int endline, int endcolumn
@@ -2530,7 +2530,7 @@ module MakeImpl<LocationSig Location, InputSig<Location> Lang> {
 
       class ApHeadContent = Unit;
 
-      overlay[caller]
+      overlay[caller?]
       pragma[inline]
       ApHeadContent getHeadContent(Ap ap) { exists(result) and ap = true }
 

shared/dataflow/codeql/dataflow/internal/DataFlowImplCommon.qll

@@ -678,7 +678,7 @@ module MakeImplCommon<LocationSig Location, InputSig<Location> Lang> {
 
       class CcCall = CallContextCall;
 
-      overlay[caller]
+      overlay[caller?]
       pragma[inline]
       predicate matchesCall(CcCall cc, Call call) {
         cc = Input2::getSpecificCallContextCall(call, _) or
@@ -890,7 +890,7 @@ module MakeImplCommon<LocationSig Location, InputSig<Location> Lang> {
     pragma[nomagic]
     private Callable getEnclosingCallable0() { nodeEnclosingCallable(this.projectToNode(), result) }
 
-    overlay[caller]
+    overlay[caller?]
     pragma[inline]
     Callable getEnclosingCallable() {
       pragma[only_bind_out](this).getEnclosingCallable0() = pragma[only_bind_into](result)
@@ -905,7 +905,7 @@ module MakeImplCommon<LocationSig Location, InputSig<Location> Lang> {
       isTopType(result) and this.isImplicitReadNode(_)
     }
 
-    overlay[caller]
+    overlay[caller?]
     pragma[inline]
     Type getType() { pragma[only_bind_out](this).getType0() = pragma[only_bind_into](result) }
 
@@ -2417,14 +2417,14 @@ module MakeImplCommon<LocationSig Location, InputSig<Location> Lang> {
    * predicate ensures that joins go from `n` to the result instead of the other
    * way around.
    */
-  overlay[caller]
+  overlay[caller?]
   pragma[inline]
   Callable getNodeEnclosingCallable(Node n) {
     nodeEnclosingCallable(pragma[only_bind_out](n), pragma[only_bind_into](result))
   }
 
   /** Gets the type of `n` used for type pruning. */
-  overlay[caller]
+  overlay[caller?]
   pragma[inline]
   Type getNodeDataFlowType(Node n) {
     nodeType(pragma[only_bind_out](n), pragma[only_bind_into](result))

shared/dataflow/codeql/dataflow/internal/DataFlowImplStage1.qll

@@ -1786,7 +1786,7 @@ module MakeImplStage1<LocationSig Location, InputSig<Location> Lang> {
            * For more information, see
            * [Locations](https://codeql.github.com/docs/writing-codeql-queries/providing-locations-in-codeql-queries/).
            */
-          overlay[caller]
+          overlay[caller?]
           pragma[inline]
           deprecated predicate hasLocationInfo(
             string filepath, int startline, int startcolumn, int endline, int endcolumn

shared/regex/codeql/regex/nfa/SuperlinearBackTracking.qll

@@ -101,7 +101,7 @@ module Make<RegexTreeViewSig TreeImpl> {
     /**
      * Holds if the tuple `(r1, r2, r3)` might be on path from a start-state to an end-state in the product automaton.
      */
-    overlay[caller]
+    overlay[caller?]
     pragma[inline]
     predicate isFeasibleTuple(State r1, State r2, State r3) {
       // The first element is either inside a repetition (or the start state itself)

shared/typeinference/codeql/typeinference/internal/TypeInference.qll

@@ -851,7 +851,7 @@ module Make1<LocationSig Location, InputSig1<Location> Input1> {
         )
       }
 
-      overlay[caller]
+      overlay[caller?]
       pragma[inline]
       predicate baseTypeMentionHasNonTypeParameterAt(
         Type sub, TypeMention baseMention, TypePath path, Type t
@@ -859,7 +859,7 @@ module Make1<LocationSig Location, InputSig1<Location> Input1> {
         not t = sub.getATypeParameter() and baseTypeMentionHasTypeAt(sub, baseMention, path, t)
       }
 
-      overlay[caller]
+      overlay[caller?]
       pragma[inline]
       predicate baseTypeMentionHasTypeParameterAt(
         Type sub, TypeMention baseMention, TypePath path, TypeParameter tp

shared/typetracking/codeql/typetracking/internal/TypeTrackingImpl.qll

@@ -512,7 +512,7 @@ module TypeTracking<LocationSig Location, TypeTrackingInput<Location> I> {
      * }
      * ```
      */
-    overlay[caller]
+    overlay[caller?]
     pragma[inline]
     TypeTracker smallstep(Node nodeFrom, Node nodeTo) {
       result = this.smallstepNoSimpleLocalFlowStep(nodeFrom, nodeTo)
@@ -657,7 +657,7 @@ module TypeTracking<LocationSig Location, TypeTrackingInput<Location> I> {
      * }
      * ```
      */
-    overlay[caller]
+    overlay[caller?]
     pragma[inline]
     TypeBackTracker smallstep(Node nodeFrom, Node nodeTo) {
       result = this.smallstepNoSimpleLocalFlowStep(nodeFrom, nodeTo)