File indexing completed on 2024-05-05 04:38:47

 /*
     SPDX-FileCopyrightText: 2007-2008 David Nolden <david.nolden.kdevelop@art-master.de>
 
     SPDX-License-Identifier: LGPL-2.0-only
 */
 
 #ifndef KDEVPLATFORM_PUSHVALUE_H
 #define KDEVPLATFORM_PUSHVALUE_H
 
 #include <QScopedValueRollback>
 
 /**
  * A simple helper-class that does the following:
  * Backup the given reference-value given through @p ptr,
  * replace it with the value given through @p push,
  * restore the backed up value back on destruction.
  *
  * NOTE: This is _not_ a direct alias of QScopedValueRollback,
  *       the behavior of the constructor is different:
  *       PushValue will *always* push, PushPositiveValue will only
  *       push if the value evaluates to true. QScopedValueRollback
  *       will *always* push with the ctor that takes a new value,
  *       and *never* with the ctor that just takes a ref.
  **/
 template<class Value>
 class PushValue : public QScopedValueRollback<Value>
 {
 public:
     explicit PushValue(Value& ref, const Value& newValue = Value())
         : QScopedValueRollback<Value>(ref, newValue)
     {
     }
 };
 
 ///Only difference to PushValue: The value is only replaced if the new value is positive
 template<class Value>
 class PushPositiveValue : public QScopedValueRollback<Value>
 {
 public:
     explicit PushPositiveValue(Value& ref, const Value& newValue = Value())
         : QScopedValueRollback<Value>(ref)
     {
         if (newValue) {
             ref = newValue;
         }
     }
 };
 
 #endif