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e7195ab476
Macro defining Handle class is replaced by template class implementing the same concept (defined in Standard_Handle.hxx and Standard_Transient.hxx), opencascade::handle<>. Header file Standard_DefineHandle.hxx becomes deprecated: the only useful macro DEFINE_STANDARD_RTTI is defined now in Standard_Type.hxx. Standard_DefineHandle.hxx is kept for compatibility, it defines macros previously used for definition of Handles and RTTI as empty. Macro DEFINE_STANDARD_HANDLE(C1,C2) is also kept for compatibility; now it expands to typedef "Handle_C1" to corresponding handle class. Definitions of macro Handle() and STANDARD_TYPE() moved from Standard_Macro.hxx to Standard_Handle.hxx (new file) and Standard_Type.hxx, respectively. New template class NCollection_Shared added, allowing to define sub-class manipulated by handle, for any non-transient class. Adaptations for compiling with GCC 4.7
63 lines
2.1 KiB
C++
63 lines
2.1 KiB
C++
// Created on: 2015-06-26
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// Created by: Andrey Betenev
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// Copyright (c) 2015 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#ifndef NCollection_Shared_HeaderFile
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#define NCollection_Shared_HeaderFile
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#include <Standard_Type.hxx>
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//! Template defining a class derived from the specified base class and
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//! Standard_Transient, and supporting OCCT RTTI.
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//!
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//! This provides possibility to use Handes for types not initially intended
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//! to be dynamically allocated.
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//!
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//! Current limitation is that only copy and constructors with 1-3 arguments are defined,
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//! calling those of the argument class (default constructor must be available).
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//! It can be improved when perfect forwarding of template arguments is supported
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//! by all compilers used for OCCT.
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//!
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//! The intent is similar to std::make_shared<> in STL, except that this
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//! implementation defines a separate type.
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template <class T, typename = typename std::enable_if<! std::is_base_of<Standard_Transient, T>::value>::type>
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class NCollection_Shared : public Standard_Transient, public T
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{
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public:
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DEFINE_STANDARD_ALLOC
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DEFINE_NCOLLECTION_ALLOC
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//! Default constructor
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NCollection_Shared () {}
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//! Constructor with single argument
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template <typename T1>
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NCollection_Shared (T1 arg1) : T(arg1) {}
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//! Constructor with two arguments
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template <typename T1, typename T2>
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NCollection_Shared (T1 arg1, T2 arg2) : T(arg1, arg2) {}
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/* this could work...
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//! Forwarding constructor
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template<typename... Args>
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NCollection_Shared (Args&&... args)
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: T (std::forward<Args>(args)...)
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{}
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*/
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};
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#endif
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