How to use std::foreach with parameters/modification

Question

I\'ve found myself writing

for(int i=0;iDoWhatever(param);

a lot, and I\'d like to compress this into

Answer 1

Oh, also, for various reasons, I don't want to use boost.

Valid decision, but most likely the wrong one. Consider Boost as an extension to the STL. C++ is a library-driven language. If you don't take this into account, your code will be qualitatively inferior.

While std::for_each can be used here, the absence of lambda expressions in C++ until C++0x makes this tedious. I advocate using Boost.ForEach! It makes this much easier:

foreach (yourtype x, yourvec)
    if (x.IsOK())
        x.Whatever();