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occt/src/IVtkDraw/IVtkDraw.hxx
abv 1bd04b5a02 0031060: Configuration - Support building with CLang compiler under VS 2019
Build tools are updated to support building with Visual Studion 2019 toolset ClangCL (LLVM clang-cl):
- In CMake builds, use of unsupported option "-std=c++0x" is avoided
- Tool genconf recognizes availability of ClangCL toolset and proposes it in the list
- Tool genproj recognizes new compiler specification VCVER=vclang and generates VS 2019 projects for it

Note that vclang configuration puts binaries to folder "vc14" as it is compatible with vc14 CRT.

Code is updated to build with Clang for Windows without errors and warnings:
- In BVH classes, pure virtual destructors are replaced by empty ones, to avoid bogus compiler warning
- In .lex files, pragmas are added to disable warnings in parser code
- In OSD, signature of function _osd_wnt_set_error() is corrected to avoid warning on incorrect use of va_args (undefined behavior)
- In OSD_Host, OSD_Parallel_TBB, warnings on usage of deprecated function are disabled
- In Quantity_ColorRGBA and ViewerTest_CmdParser, incorrect use of predefined macro __FUNCTION__ assuming it was a string literal is avoided
- In Standard_Macro.hxx, code is reordered to handle Clang for Windows appropriately
- In AdvApp2Var_SysBase.hxx, inclusion of obsolete (MSVC-specific) header file is replaced by Standard_TypeDef.hxx
- In Standard_ErrorHandler.hxx, empty statements added to avoid warning on unused class fields
- In IVtkDraw and ViewerTest, interface is corrected to use actual type avoiding unnecessary type casts

Off-topic: corrections of some errors (uninitialized class fields) reported by VS Code Analysis in TKernel
2019-11-03 21:47:59 +03:00

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// Created on: 2012-02-03
//
// Copyright (c) 2012-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.
#ifndef _IVtkDraw_HeaderFile
#define _IVtkDraw_HeaderFile
#include <Standard_Transient.hxx>
#include <Standard.hxx>
#include <Standard_Macro.hxx>
class Draw_Interpretor;
class WNT_WClass;
class IVtkDraw
{
public:
DEFINE_STANDARD_ALLOC
Standard_EXPORT static void ViewerInit (Standard_Integer thePxLeft,
Standard_Integer thePxTop,
Standard_Integer thePxWidth,
Standard_Integer thePxHeight);
Standard_EXPORT static void Factory (Draw_Interpretor& theDI);
Standard_EXPORT static void Commands (Draw_Interpretor& theCommands);
private:
Standard_EXPORT static const Handle(WNT_WClass)& WClass();
};
#endif