6 replies to this topic

[Flying Dutchman]

Before you ask, va_list doesn't cut it because arguments are objects (va_list only works for plain data types) and I also don't intend to wait for C++0x.

So, I'm looking for a way to pass a variable number of arguments to a class method. I'd like to pass arguments not in array/vector or anything like that. If anyone has idea(s), do tell!

[BlaineSch]

Is there a reason you can't use vectors?

[dargueta]

You could:
1) Using BlainSch's idea, make a superclass of everything that doesn't do anything and use that for the vector
2) Use pointers to all classes passed instead of passing the classes themselves. Since pointers are primitives, you should be fine.

[Smilex]

you can't do function(int count, ...) ? Haven't tried it myself for some time, but I think I remember doing this before C++0x

[dargueta]

Smilex said:

you can't do function(int count, ...) ? Haven't tried it myself for some time, but I think I remember doing this before C++0x

Yes you can, which is why I was saying to pass pointers so you could get primitive datatypes. You'll need va_args to access the rest of the arguments.

[Flying Dutchman]

@BlaineSch, no reason really, I just think it looks prettier that way. :)

Solved with pointers, thanks. I have another sub question: I'm parsing a text file and some lines may have 3 or 4 (or more, but highly unlikely) integer values. Best method to parse them I can think of is to read whole line, split that line by spaces (values are separated by spaces) and then count elements. Any better ideas?

[dargueta]

Do you need to keep track of what integers are on which lines? If not, you can use fscanf() for C, and an std::ifstream object (include <fstream>) for C++. Both use spaces as delimiters by default. If you do need to keep track of lines, you can read in a line and use strtok() or an std::istringstream object (include <sstream>) to do the job.