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Per Westermark
10/25/11 03:28
Read: 716 times
Sweden


 
#184356 - Not all compilers are as good at generate warnings
Responding to: Marshall Brown's previous message
You shouldn't really assign numeric values - that kills much of the advantages with enumerators.

If the compiler will warn or not depends on used compiler, and what warning levels you have turned on.

Another question is - will your compiler warn about:

switch (my_enum_var) {
    case actionEmpty: break;
    case actionOn: break;
    case actionOff: break;
    //actionRegulate, <= case not handled
    case actionPulse: break;
}

With #define, the missing rule for actionRegulate can not be detected. Many compilers will inform that actionRegulate doesn't have an explicit match and that there isn't any garbage collect using a default case.

The difference between enum and #define is that good use of enum always gives more information to the programmer. And use of enum will allow better compiler to produce additional type checking. The #define search/replace does not give any information to programmer or compiler about what set of values that are intended for a variable.

List of 23 messages in thread
TopicAuthorDate
User entered recipes ???      Marshall Brown      10/24/11 13:35      
   Just create array of regular rules      Per Westermark      10/24/11 15:30      
      Thanks - that's great      Marshall Brown      10/24/11 17:35      
         programming language      Jan Waclawek      10/25/11 00:55      
            programming language - not really      Marshall Brown      10/25/11 01:21      
               consider enum        Per Westermark      10/25/11 01:48      
                  thanks - implemented.      Marshall Brown      10/25/11 02:23      
                     Intelligence      Per Westermark      10/25/11 02:34      
                        I must have a stupid compiler      Marshall Brown      10/25/11 03:05      
                           Not all compilers are as good at generate warnings      Per Westermark      10/25/11 03:28      
                              no warning/error on the compiler      Marshall Brown      10/25/11 03:55      
                                 response from Raisonance      Marshall Brown      10/27/11 09:51      
                  enumerations on 8051      Andy Peters      10/25/11 12:14      
                     enums are 8bit by default on Raisonance      Marshall Brown      10/25/11 12:42      
                        NULL      Jan Waclawek      10/26/11 04:08      
                           Could you show me the code      Marshall Brown      10/26/11 13:49      
                              compatibility et al      Jan Waclawek      10/27/11 04:15      
                                 why change pointer to CODE?      Marshall Brown      10/27/11 10:21      
                                    enum advantage      Michael Karas      10/27/11 11:18      
                                    user page does not work (at least for me)      Jan Waclawek      10/28/11 15:26      
                                       try it now      Marshall Brown      10/30/11 17:08      
                     re: enumerations on 8051      Andy Peters      11/01/11 15:22      
   Article on Hierarchical Menu Structure      Aubrey Kagan      11/02/11 09:42      

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