Re: unique identifiers for guard macros

[red floyd]

Angel Tsankov wrote:
> Can someone recommend a way to create "unique" identifiers for use in 
> guard macros:
>
> #if !defined (UNIQUE_GUARD)
> #define UNIQUE_GUARD
> ...
> #endif //!defined UNIQUE_GUARD

In VC6 MS tacked a GUID onto the end of the include guard e.g.

#if !defined(FILE_H_INSERT_128_BIT_GUID_HERE)

but in VC7 and later they came up with #pragma once.

If you do any MS/COM programming, or (I think) CORBA programming, you 
should have a GUID generator.