thrust::none_of

Defined in thrust/logical.h

template<typename DerivedPolicy, typename InputIterator, typename Predicate> bool thrust::none_of(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, InputIterator first, InputIterator last, Predicate pred)

none_of determines whether no element in a range satifies a predicate. Specifically, none_of returns true if there is no iterator i in the range [first, last) such that pred(*i) is true, and false otherwise.

The algorithm’s execution is parallelized as determined by exec.

#include <thrust/logical.h>
#include <thrust/functional.h>
#include <thrust/execution_policy.h>
...
bool A[3] = {true, true, false};

thrust::none_of(thrust::host, A, A + 2, thrust::identity<bool>()); // returns false
thrust::none_of(thrust::host, A, A + 3, thrust::identity<bool>()); // returns false

thrust::none_of(thrust::host, A + 2, A + 3, thrust::identity<bool>()); // returns true

// empty range
thrust::none_of(thrust::host, A, A, thrust::identity<bool>()); // returns true