std::any_of is an STL algorithm since the C++11 standard to check if there is an element in a container that satisfies a certain predicate.
#include <algorithm> #include <cassert> int main() { //Create a std::vector with only positive values const std::vector<int> v = { 0,1,2,3,4,5 }; //Assume any of these has the value of three assert(std::any_of(v.begin(),v.end(),[](const int i){ return i == 3; } )); }