rename overlay[caller] to 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))