diff options
Diffstat (limited to 'doc/src/snippets/code/src_corelib_tools_qscopedpointer.cpp')
| -rw-r--r-- | doc/src/snippets/code/src_corelib_tools_qscopedpointer.cpp | 138 |
1 files changed, 0 insertions, 138 deletions
diff --git a/doc/src/snippets/code/src_corelib_tools_qscopedpointer.cpp b/doc/src/snippets/code/src_corelib_tools_qscopedpointer.cpp deleted file mode 100644 index fd9cd3e4b0..0000000000 --- a/doc/src/snippets/code/src_corelib_tools_qscopedpointer.cpp +++ /dev/null @@ -1,138 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). -** Contact: http://www.qt-project.org/ -** -** This file is part of the documentation of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:BSD$ -** You may use this file under the terms of the BSD license as follows: -** -** "Redistribution and use in source and binary forms, with or without -** modification, are permitted provided that the following conditions are -** met: -** * Redistributions of source code must retain the above copyright -** notice, this list of conditions and the following disclaimer. -** * Redistributions in binary form must reproduce the above copyright -** notice, this list of conditions and the following disclaimer in -** the documentation and/or other materials provided with the -** distribution. -** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor -** the names of its contributors may be used to endorse or promote -** products derived from this software without specific prior written -** permission. -** -** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -//! [0] -void myFunction(bool useSubClass) -{ - MyClass *p = useSubClass ? new MyClass() : new MySubClass; - QIODevice *device = handsOverOwnership(); - - if (m_value > 3) { - delete p; - delete device; - return; - } - - try { - process(device); - } - catch (...) { - delete p; - delete device; - throw; - } - - delete p; - delete device; -} -//! [0] - -//! [1] -void myFunction(bool useSubClass) -{ - // assuming that MyClass has a virtual destructor - QScopedPointer<MyClass> p(useSubClass ? new MyClass() : new MySubClass); - QScopedPointer<QIODevice> device(handsOverOwnership()); - - if (m_value > 3) - return; - - process(device); -} -//! [1] - -//! [2] - const QWidget *const p = new QWidget(); - // is equivalent to: - const QScopedPointer<const QWidget> p(new QWidget()); - - QWidget *const p = new QWidget(); - // is equivalent to: - const QScopedPointer<QWidget> p(new QWidget()); - - const QWidget *p = new QWidget(); - // is equivalent to: - QScopedPointer<const QWidget> p(new QWidget()); -//! [2] - -//! [3] -if (scopedPointer) { - ... -} -//! [3] - -//! [4] -class MyPrivateClass; // forward declare MyPrivateClass - -class MyClass -{ -private: - QScopedPointer<MyPrivateClass> privatePtr; // QScopedPointer to forward declared class - -public: - MyClass(); // OK - inline ~MyClass() {} // VIOLATION - Destructor must not be inline - -private: - Q_DISABLE_COPY(MyClass) // OK - copy constructor and assignment operators - // are now disabled, so the compiler won't implicitely - // generate them. -}; -//! [4] - -//! [5] -// this QScopedPointer deletes its data using the delete[] operator: -QScopedPointer<int, QScopedPointerArrayDeleter<int> > arrayPointer(new int[42]); - -// this QScopedPointer frees its data using free(): -QScopedPointer<int, QScopedPointerPodDeleter> podPointer(reinterpret_cast<int *>(malloc(42))); - -// this struct calls "myCustomDeallocator" to delete the pointer -struct ScopedPointerCustomDeleter -{ - static inline void cleanup(MyCustomClass *pointer) - { - myCustomDeallocator(pointer); - } -}; - -// QScopedPointer using a custom deleter: -QScopedPointer<MyCustomClass, ScopedPointerCustomDeleter> customPointer(new MyCustomClass); -//! [5] |