Enums reference in C++

[fabrice.gautier]

Hi,

I found some Visual C++ that looked like this:

enum colors { red, blue, green };

void f(void)
{
colors C;

C = colors::red /* Is this valid ?? */
}


Is the last assigment a valid C++ syntax? It looks as if defining an
enum also define a namespace of the same name.
This code doesnt compile with gcc. Is it some MS only extension or is
that defined in some revision of the C++ language spec ?

Thanks

-- Fox

 

[hyperfusion]

seems like a m$ extension to me (I only see it in Windows code)

 

[Ioannis Vranos]

Hi,

I found some Visual C++ that looked like this:

enum colors { red, blue, green };

void f(void)
{
colors C;

C = colors::red /* Is this valid ?? */
}


Is the last assigment a valid C++ syntax? It looks as if defining an
enum also define a namespace of the same name.
This code doesnt compile with gcc. Is it some MS only extension or is
that defined in some revision of the C++ language spec ?

This looks like a managed enum of C++ "managed extensions" (.NET) and is not part of ISO C++.


With the upcoming C++/CLI and VS 2005, CLI types are provided with a separate syntax than
ISO C++ facilities, to reduce confusion and preserve semantics (now with managed
extensions is "on context" and is upon he programmer to know exactly what is going on).