fixup! C++: Move the 'getArgumentIndex' into the abstract 'Position' class. It is implemented in all subclasses anyway.

Author: MathiasVP

cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/DataFlowUtil.qll

@@ -1445,7 +1445,7 @@ private class ExplicitParameterInstructionNode extends AbstractExplicitParameter
   ExplicitParameterInstructionNode() { exists(instr.getParameter()) }
 
   override predicate isSourceParameterOf(Function f, ParameterPosition pos) {
-    f.getParameter(pos.(DirectPosition).getIndex()) = instr.getParameter()
+    f.getParameter(pos.(DirectPosition).getArgumentIndex()) = instr.getParameter()
   }
 
   override string toStringImpl() { result = instr.getParameter().toString() }
@@ -1460,7 +1460,7 @@ class ThisParameterInstructionNode extends AbstractExplicitParameterNode,
   ThisParameterInstructionNode() { instr.getIRVariable() instanceof IRThisVariable }
 
   override predicate isSourceParameterOf(Function f, ParameterPosition pos) {
-    pos.(DirectPosition).getIndex() = -1 and
+    pos.(DirectPosition).getArgumentIndex() = -1 and
     instr.getEnclosingFunction() = f
   }
 
@@ -1494,7 +1494,7 @@ private class DirectBodyLessParameterNode extends AbstractExplicitParameterNode,
 
   override predicate isSourceParameterOf(Function f, ParameterPosition pos) {
     this.getFunction() = f and
-    f.getParameter(pos.(DirectPosition).getIndex()) = p
+    f.getParameter(pos.(DirectPosition).getArgumentIndex()) = p
   }
 
   override Parameter getParameter() { result = p }