4f4c5fcfdf
This is a combination of running clang-tidy with modernize-use-nullptr check for some ports (GTK, X11, OSX) and manual changes to the ports for which it couldn't be used easily (MSW, DFB) and also manually updating the docs. Also replace NULL with null or nullptr in the comments as this is more consistent with the use of nullptr in the code and makes it simpler to grep for the remaining occurrences of NULL itself. And also use null in the assert messages. Only a few occurrences of "NULL" are still left in non-C files, mostly corresponding to unclear comments or string output which it might not be safe to change.
61 lines
2 KiB
C++
61 lines
2 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: wx/itemid.h
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// Purpose: wxItemId class declaration.
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// Author: Vadim Zeitlin
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// Created: 2011-08-17
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// Copyright: (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_ITEMID_H_
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#define _WX_ITEMID_H_
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// ----------------------------------------------------------------------------
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// wxItemId: an opaque item identifier used with wx{Tree,TreeList,DataView}Ctrl.
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// ----------------------------------------------------------------------------
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// The template argument T is typically a pointer to some opaque type. While
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// wxTreeItemId and wxDataViewItem use a pointer to void, this is dangerous and
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// not recommended for the new item id classes.
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template <typename T>
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class wxItemId
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{
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public:
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typedef T Type;
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// This ctor is implicit which is fine for non-void* types, but if you use
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// this class with void* you're strongly advised to make the derived class
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// ctor explicit as implicitly converting from any pointer is simply too
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// dangerous.
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wxItemId(Type item = nullptr) : m_pItem(item) { }
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// Default copy ctor, assignment operator and dtor are ok.
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bool IsOk() const { return m_pItem != nullptr; }
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Type GetID() const { return m_pItem; }
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operator const Type() const { return m_pItem; }
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// This is used for implementation purposes only.
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Type operator->() const { return m_pItem; }
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void Unset() { m_pItem = nullptr; }
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// This field is public *only* for compatibility with the old wxTreeItemId
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// implementation and must not be used in any new code.
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//private:
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Type m_pItem;
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};
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template <typename T>
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bool operator==(const wxItemId<T>& left, const wxItemId<T>& right)
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{
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return left.GetID() == right.GetID();
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}
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template <typename T>
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bool operator!=(const wxItemId<T>& left, const wxItemId<T>& right)
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{
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return !(left == right);
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}
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#endif // _WX_ITEMID_H_
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