C++11 algorithms with multiple predicates

问题

Functions such as std::find_if from the algorithm header are really useful, but 1 serious limit for me is the fact that I can only use 1 predicate for each call to count_if.

For example given a container like an std::vector I would like to apply, at the same time, with the same iteration of find_if, multiple predicates; there is something in the standard library that makes this possible while keeping this functional approach ?

回答1:

Just combine them with a lambda:

std::find_if(begin(vec), end(vec),
    [](elem_t val) {
        return f1(val) || f2(val);
    });

来源：https://stackoverflow.com/questions/20754848/c11-algorithms-with-multiple-predicates