Enum question

**Bill 101** · 10-29-2002

Hi all!

Is it possible somoehow to fetch the name of an enumerated var?

eg: enum {foo=1,boo=2}

Well, I would like to get 'foo' from this and not its value to find out if that name is enumerated.

Is this possible, or stupid question? -

(Most likely the latter...-

Thanks

**Bill 101** · 10-29-2002

Hi,

Too bad, it would be useful sometimes.. Anyway, thanks, then I leave it alone.

Bye

**Magos** · 10-29-2002

Not from the enumeration, but you can make a string array to get it from:

Code:

enum {Alpha=0, Beta, Gamma};
char* Names[] = {"Alpha", "Beta", "Gamma"};

printf("%s", Names[Alpha]);

Make sure your enumeration starts at 0.

**Dave_Sinkula** · 10-29-2002

This is a variation of something I've used to do this.

Code:

#include <stdio.h>
#include <string.h>

enum EType
{
    #define GET_ENUM
    #include "test.mh"
    MY_TOTAL
};

static const char *const EnumText [ MY_TOTAL ] =
{
    #define GET_ENUM_TEXT
    #include "test.mh"
};

static const char *const Description [ MY_TOTAL ] =
{
    #define GET_DESCRIPTION
    #include "test.mh"
};

int main(void)
{
    enum EType i;
    for ( i = 0; i < MY_TOTAL; ++i )
    {
        printf("(%d) %-5s \"%s\"\n", i, EnumText [ i ], Description [ i ]);
    }
    return 0;
}

/* my output
(0) ALPHA "This is a description of this element."
(1) BETA  "The next item has no description."
(2) GAMMA ""
(3) DELTA ""
*/

The multiply-included [test.mh] is like the following.

Code:

/* Macro Definition */
#if   defined(GET_ENUM)
#define MACRO(tag,desc)  tag,
#elif defined(GET_ENUM_TEXT)
#define MACRO(tag,desc)  #tag,
#elif defined(GET_DESCRIPTION)
#define MACRO(tag,desc)  desc,
#else
#define MACRO(tag,desc)
#endif

/* Macro Binding */
MACRO(ALPHA, "This is a description of this element.")
MACRO(BETA,  "The next item has no description.")
MACRO(GAMMA, "")
MACRO(DELTA, "")

/* Macro Un-Definition */
#undef MACRO

#if   defined(GET_ENUM)
#undef        GET_ENUM
#elif defined(GET_ENUM_TEXT)
#undef        GET_ENUM_TEXT
#elif defined(GET_DESCRIPTION)
#undef        GET_DESCRIPTION
#endif

There are other variations as well.

**Bill 101** · 10-31-2002

Hi!

Wow sounds good, I will try this. Thanks for the help for everyone!

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