C++ LINQ-like iterator operations

Question

Having been tainted by Linq, I\'m reluctant to give it up. However, for some things I just need to use C++.

The real strength of linq as a linq-consumer (i.e. to me) li

Answer 1

Here is another alternative that is simply a wrapper around boost and stl algorithms, and thus you get all the performance benefits of those implementations.

It works like this:

std::vector xs;
auto count = from(xs)
   .select([](int x){return x*x;})
   .where([](int x){return x > 16;})
   .count();
auto xs2 = from(xs)
   .select([](int x){return x*x;})
   .to>();

Note that some methods return a proxy for empty ranges, e.g.

std::vector xs;
auto max = from(xs)
   .select([](int x){return x*x;})
   .where([](int x){return x > 16;})
   .max()
   .value_or(0);