The Visual C++ 2005 preprocessor contains the following new features:

• __CLR_VER predefined macro added. For more information, see Predefined Macros.

• The comment (C/C++) pragma now accepts /MANIFESTDEPENDENCY as a linker comment. The exestr option to comment is now deprecated.

• embedded_idl attribute (The #import Directive) now takes an optional parameter.

• fenv_access pragma

• float_control pragma

• fp_contract pragma

• Global variables will not be initialized in the order they are declared if you have global variables in pragma managed, unmanaged and unmanaged sections. This is a potential breaking change if, for example, an unmanaged global variable is initialized with a managed global variables, and a fully constructed managed object is required.

• Sections specified with init_seg are now read only, and not read/write as in previous versions.

• inline_depth default is now 16. A default of 16 was also in effect in Visual C++ .NET 2003.

• _INTEGRAL_MAX_BITS predefined macro added, see Predefined Macros.

• _M_CEE, _M_CEE_PURE, and _M_CEE_SAFE predefined macros added, see Predefined Macros.

• _M_IX86_FP predefined macro added. For more information, see Predefined Macros.

• _M_X64 predefined macro added. For more information, see Predefined Macros.

• make_public pragma

• managed, unmanaged pragma syntax updated (now has push and pop)

• mscorlib.dll is now implicitly referenced by The #using Directive in all /clr compilations.

• _OPENMP predefined macro added. For more information, see Predefined Macros.

• optimize pragma has been updated, a and w are no longer valid parameters.

• no_registry #import attribute has been added.

• region, endregion pragmas added

• _VC_NODEFAULTLIB predefined macro added. For more information, see Predefined Macros.

• Variadic Macros are now implemented.

• vtordisp is deprecated and will be removed in a future release of Visual C++.

• The warning pragma now has the suppress specifier.

Concepts