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Posted to user@thrift.apache.org by Gianni Ambrosio <gi...@vi-grade.com> on 2019/08/05 08:01:47 UTC

map enum to strings

Dear All,
I have to share an enumerator, but also correspondent string value for 
each enumerator value, between server and client. Client and server are 
implemented in C++ and C#.

Here is my enum in a .thift file:
enum ViewerType {
    ON_BOARD = 0,
    MIRROR
}

I also need the client and server to map ON_BOARD enumerator to a 
"ON_BOARD" string (and similarly for each enum value).

In C++ there is a trick to convert enums to string 
(http://userpage.fu-berlin.de/~ram/pub/pub_jf47ht81Ht/c_preprocessor_applications_en) 
but unfortunately I guess this method can not be used when the 
enumerator is in a .thrift file.

So, is there anybody that already solved this case with thrift?

Cheers,
Gianni

Re: map enum to strings

Posted by Gianni Ambrosio <gi...@vi-grade.com>.

Hi,
I realized that in the thrift generated files there is a proper std::map:

extern const std::map<int, const char*> _ViewerType_VALUES_TO_NAMES;

That's exactly what I needed!

Gianni

On 05/08/2019 10:01, Gianni Ambrosio wrote:
> Dear All,
> I have to share an enumerator, but also correspondent string value for
> each enumerator value, between server and client. Client and server are
> implemented in C++ and C#.
>
> Here is my enum in a .thift file:
> enum ViewerType {
>      ON_BOARD = 0,
>      MIRROR
> }
>
> I also need the client and server to map ON_BOARD enumerator to a
> "ON_BOARD" string (and similarly for each enum value).
>
> In C++ there is a trick to convert enums to string
> (http://userpage.fu-berlin.de/~ram/pub/pub_jf47ht81Ht/c_preprocessor_applications_en)
> but unfortunately I guess this method can not be used when the
> enumerator is in a .thrift file.
>
> So, is there anybody that already solved this case with thrift?
>
> Cheers,
> Gianni