编译选项引发的ERROR C2275：illegal use of this type as an expression

error C2275: 'CONTACT_e_MYFAVES_Return' : illegal use of this type as an expression

: see declaration of 'CONTACT_e_MYFAVES_Return'

why ? The declaration of  'CONTACT_e_MYFAVES_Return' is ok, had been validated.

So, what's wrong with you,'CONTACT_e_MYFAVES_Return'?

Jesun's answer:

 

     if  ( a_MyFavesId  <   0   ||  a_MyFavesId  >=  MYFAVES_COUNT  ||   ! a_pBirthday)
     ... {
        return CONTACT_MYFAVES_INVALID_PARAM;
    }

    CONTACT_e_MYFAVES_Return state;

    state  =  CONTACT_MYFAVES_UNKNOWN_ERROR;

 

"    CONTACT_e_MYFAVES_Return state;" (declaration)must placed on the beginning of function, just like the followed:

 

    CONTACT_e_MYFAVES_Return state;

     if  ( a_MyFavesId  <   0   ||  a_MyFavesId  >=  MYFAVES_COUNT  ||   ! a_pIconName  ||   ! a_pIconNameSize)
     ... {
        return CONTACT_MYFAVES_INVALID_PARAM;
    }

    state  =  CONTACT_MYFAVES_UNKNOWN_ERROR;

In this case, the compile option is key. In VC default compile option, there no problem.

But when compile option is strict, this style of writting can not compile with success.