Logical

Functions
template<class InputIterator , class Predicate >
bool	thrust::all_of (InputIterator first, InputIterator last, Predicate pred)
template<class InputIterator , class Predicate >
bool	thrust::any_of (InputIterator first, InputIterator last, Predicate pred)
template<class InputIterator , class Predicate >
bool	thrust::none_of (InputIterator first, InputIterator last, Predicate pred)

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Function Documentation

template<class InputIterator , class Predicate >

bool thrust::all_of	(	InputIterator	first,
		InputIterator	last,
		Predicate	pred
	)

all_of determines whether all elements in a range satify a predicate. Specifically, all_of returns true if pred(*i) is true for every iterator i in the range [first, last) and false otherwise.

Parameters:

first	The beginning of the sequence.
last	The end of the sequence.
pred	A predicate used to test range elements.

Returns:

true, if all elements satisfy the predicate; false, otherwise.

Template Parameters:

InputIterator	is a model of Input Iterator,
Predicate	must be a model of Predicate.

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

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

  // empty range
  thrust::all_of(A, A, thrust::identity<bool>()); // returns false

See also:

any_of

none_of

transform_reduce

template<class InputIterator , class Predicate >

bool thrust::any_of	(	InputIterator	first,
		InputIterator	last,
		Predicate	pred
	)

any_of determines whether any element in a range satifies a predicate. Specifically, any_of returns true if pred(*i) is true for any iterator i in the range [first, last) and false otherwise.

Parameters:

first	The beginning of the sequence.
last	The end of the sequence.
pred	A predicate used to test range elements.

Returns:

true, if any element satisfies the predicate; false, otherwise.

Template Parameters:

InputIterator	is a model of Input Iterator,
Predicate	must be a model of Predicate.

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

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

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

  // empty range
  thrust::any_of(A, A, thrust::identity<bool>()); // returns false

See also:

all_of

none_of

transform_reduce

template<class InputIterator , class Predicate >

bool thrust::none_of	(	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.

Parameters:

first	The beginning of the sequence.
last	The end of the sequence.
pred	A predicate used to test range elements.

Returns:

true, if no element satisfies the predicate; false, otherwise.

Template Parameters:

InputIterator	is a model of Input Iterator,
Predicate	must be a model of Predicate.

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

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

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

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

See also:

all_of

any_of

transform_reduce