safe alternative to va_arg

=?Utf-8?B?RmFiaWFu?= <>
Thu, 17 Apr 2008 04:56:00 -0700

for my error handling I have a class with static method overloads to print
error messages (I will probably make this a bit more general with some
pattern later). But for the start it is enough to print messages with
different numbers of arguments. I don't want to write endless overloads for
different numbers of arguments. So my first design looks like this:

// header file:

class ErrorHandler
    static inline void PrintError(const char* source, const int& numMsgParams,
    explicit ErrorHandler(){};

// cpp file:

void ErrorHandler::PrintError(const char* source, const int& numMsgParams,
    cerr << source << ": ";

    if (numMsgParams > 0)
        va_list params;
        va_start(params, numMsgParams);

        char* addParam = NULL;

        for (int i=0; i< numMsgParams; i++)
            addParam = va_arg(params, char*);
            cerr << addParam << ", ";

    cerr << endl;

Having to provide the number of arguments to the method call looks pretty
error-prone over maintenance time to me. Is there an alternative?

Thx for your suggestions,


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