[C++-sig] Re: Wrapping #define's and anonymous enum's

[David Abrahams]

"Mike Rovner" <mike at bindkey.com> writes:

> "William Trenker" <wtrenker at hotmail.com> wrote in message
> news:F62JMYRF7luM8gbvdBR000026c2 at hotmail.com...
>> Many C/C++ libraries contain one or more .h/.hpp files that define various
>> constants used by that library's API.
>>
>> What is the prescribed method for wrapping #defines that are used to
>> represent constants?
>>
>> Also, how do I wrap anonymous enums?
>>
>> For example, I have a project with an Constants.h file containing:
>>
>> #define MSG_A 23
>> #define MSG_B 25
>> enum {Red, White, Blue = 40 };
>>
>> What would the boost wrapper code for the above look like?
>>
>
>   #include <boost/python.hpp>
>
>   BOOST_PYTHON_MODULE(my_module)
>   {
>     scope().attr("MSG_A") = 23;
>     scope().attr("MSG_B") = 25;
>     scope().attr("Red") = 0;
>    ...
>   }
>
> But you really DON'T WANT to do this.
> Think twice about your code.

Why not, Mike?

FYI, there's also:

        enum_<my_enum>("my_enum")
                .value("Red", Red)
                .value("White", White)
                .value("Blue", Blue)
                ;

But of course, you have to have a name for the enum type to do that.


-- 
                       David Abrahams
   dave at boost-consulting.com * http://www.boost-consulting.com
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