Merge pull request #16289 from jketema/reuse-improve

C++: Improve handling of re-use expressions

Author: jketema

cpp/ql/lib/semmle/code/cpp/exprs/Expr.qll

@@ -1371,17 +1371,7 @@ class ReuseExpr extends Expr, @reuseexpr {
   /**
    * Gets the expression that is being re-used.
    */
-  Expr getReusedExpr() {
-    // In the case of a prvalue, the extractor outputs the expression
-    // before conversion, but the converted expression is intended.
-    if this.isPRValueCategory()
-    then result = this.getBaseReusedExpr().getFullyConverted()
-    else result = this.getBaseReusedExpr()
-  }
-
-  private Expr getBaseReusedExpr() {
-    expr_reuse(underlyingElement(this), unresolveElement(result), _)
-  }
+  Expr getReusedExpr() { expr_reuse(underlyingElement(this), unresolveElement(result), _) }
 
   override Type getType() { result = this.getReusedExpr().getType() }