VS15: Add Visual Studio 15 generator

Call the generator "Visual Studio 15" without any year because the
preview version of VS 15 does not provide a year in the product name.

Copy cmGlobalVisualStudio14Generator to cmGlobalVisualStudio15Generator
and update version numbers accordingly.  Add the VS15 enumeration value.
Note that we do not need to add a MSVC15 variable or v150 toolset
because Visual Studio 15 comes with an updated version of the v140
toolset and remains ABI-compatible.

Teach tests VSExternalInclude, RunCMake.GeneratorPlatform, and
RunCMake.GeneratorToolset to treat VS 15 as they do VS 10-14.

Closes: #16143

1 files changed, 46 insertions, 0 deletions

diff --git a/Source/cmGlobalVisualStudio15Generator.h b/Source/cmGlobalVisualStudio15Generator.h
new file mode 100644
index 0000000..f673883
--- /dev/null
+++ b/Source/cmGlobalVisualStudio15Generator.h
@@ -0,0 +1,46 @@
+/*============================================================================
+  CMake - Cross Platform Makefile Generator
+  Copyright 2000-2016 Kitware, Inc., Insight Software Consortium
+
+  Distributed under the OSI-approved BSD License (the "License");
+  see accompanying file Copyright.txt for details.
+
+  This software is distributed WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the License for more information.
+============================================================================*/
+#ifndef cmGlobalVisualStudio15Generator_h
+#define cmGlobalVisualStudio15Generator_h
+
+#include "cmGlobalVisualStudio14Generator.h"
+
+/** \class cmGlobalVisualStudio15Generator  */
+class cmGlobalVisualStudio15Generator : public cmGlobalVisualStudio14Generator
+{
+public:
+  cmGlobalVisualStudio15Generator(cmake* cm, const std::string& name,
+                                  const std::string& platformName);
+  static cmGlobalGeneratorFactory* NewFactory();
+
+  virtual bool MatchesGeneratorName(const std::string& name) const;
+
+  virtual void WriteSLNHeader(std::ostream& fout);
+
+  virtual const char* GetToolsVersion() { return "15.0"; }
+protected:
+  virtual bool SelectWindowsStoreToolset(std::string& toolset) const;
+
+  virtual const char* GetIDEVersion() { return "15.0"; }
+
+  // Used to verify that the Desktop toolset for the current generator is
+  // installed on the machine.
+  virtual bool IsWindowsDesktopToolsetInstalled() const;
+
+  // These aren't virtual because we need to check if the selected version
+  // of the toolset is installed
+  bool IsWindowsStoreToolsetInstalled() const;
+
+private:
+  class Factory;
+};
+#endif