[c++/STL] Selective iterator
- by rubenvb
FYI: no boost, yes it has this, I want to reinvent the wheel ;)
Is there some form of a selective iterator (possible) in C++? What I want is to seperate strings like this:
some:word{or other
to a form like this:
some : word { or other
I can do that with two loops and find_first_of(":") and ("{") but this seems (very) inefficient to me. I thought that maybe there would be a way to create/define/write an iterator that would iterate over all these values with for_each. I fear this will have me writing a full-fledged custom way-too-complex iterator class for a std::string.
So I thought maybe this would do:
std::vector<size_t> list;
size_t index = mystring.find(":");
while( index != std::string::npos )
{
list.push_back(index);
index = mystring.find(":", list.back());
}
std::for_each(list.begin(), list.end(), addSpaces(mystring));
This looks messy to me, and I'm quite sure a more elegant way of doing this exists. But I can't think of it. Anyone have a bright idea? Thanks
PS: I did not test the code posted, just a quick write-up of what I would try
