Log Class **advice**
Members - Reputation: 119
Posted 13 March 2011 - 08:29 PM
Log( std::wstring error1 );
Log( std::wstring error1, std::wstring error2 );
Log( std::wstring error1, std::wstring error2, std::wstring error3 );
Log( std::wstring error1, std::wstring error2, std::wstring error3,....... );
here is my problem...i have a custom exception class with the decleration below
class InvalidArgumentException : public std::exception
InvalidArgumentException( const std::wstring& argumentName );
virtual std::wstring what();
i have 2 functions that return strings.... what() and getOtherInfo()...obviously i could make my log class except 2 std::wstrings and implement it like that....but then the class MUST EXCEPT 2 strings...what if i or another user wants to use my log class later on and it only has 1 string i need to record info on? say if i or another user wants to use this log class in another program and my/their custom exception returns 3 strings....then they have to edit my class to accomodate for accepting more strings in the constructor. My question is how can i implement it so my log class will except any # of strings and be able to log the info accordingly in a .txt file? is this even possible? i guess im asking is it possible to have a variable number of arguments? or does anyone have any ideas to achieve what im trying to achieve?i dont wanna have to destroy and recreate the object each time i wanna insert a string in my file....plus it will keep printing the time for each time i open then log object! -thx for any advice
Members - Reputation: 152
Posted 13 March 2011 - 08:47 PM
Log my_error_log; //... std::vector<std::string> error_messages; error_messages.push_back("Great-scott!\n"); error_messages.push_back("There was an error!"); my_error_log.writeToLog(error_messages);
Though it's a bit confusing how the only functions your log prototype there provides are constructors.
And use code tags, makes stuff easier to read.
GDNet+ - Reputation: 13208
Posted 13 March 2011 - 09:16 PM
Provide the common, expected cases -- 1, 2 or 3 strings, and then provide some kind of back-door to cater to people who might need more -- this might mean writing a version which takes a variable arguments list of strings, or it might simply mean saying "if you want to show more information, you'll have to concatenate some of your strings manually. You are responsible for your own formatting."
Perhaps more to the point, unless you're developing an established library or middleware platform, code for your own use -- this doesn't mean to throw out all thought of what your future needs may be (ie don't choose the easy way and paint yourself into a corner), but it does mean throw out all concerns of what others might need. The simple and blunt fact is that, in all likelihood, no one's going to see, much less use or adapt, your code. Don't make it anything more than you need for your own purposes unless it is being designed explicitly for public consumption (keeping in mind, for example, that "my professor has to grade this" is a form of public consumption). When your code *does* have an audience, understand their needs, don't speculate about them.
throw table_exception("(ノ ゜Д゜)ノ ︵ ┻━┻");