Defined in header
template< class BidirIt, class UnaryPredicate >
BidirIt stable_partition( BidirIt first, BidirIt last, UnaryPredicate p );
template< class ExecutionPolicy, class BidirIt, class UnaryPredicate >
BidirIt stable_partition( ExecutionPolicy&& policy, BidirIt first, BidirIt last, UnaryPredicate p );
[first, last)in such a way that all elements for which the predicate
preturns true precede the elements for which predicate
preturns false. Relative order of the elements is preserved.
policy. This overload does not participate in overload resolution unless std::is_execution_policy_v<std::decay_t<ExecutionPolicy>> is true
|first, last||-||the range of elements to reorder|
|policy||-||the execution policy to use. See execution policy for details.|
|p||-|| unary predicate which returns true if the element should be ordered before other elements. |
The signature of the predicate function should be equivalent to the following:
bool pred(const Type &a);
The signature does not need to have const &, but the function must not modify the objects passed to it.
| -The type of dereferenced |
 Return value
Iterator to the first element of the second group
last-first applications of the predicate and at most
(last-first)*log(last-first) swaps if there is insufficient memory or linear number of swaps if sufficient memory is available.
The overload with a template parameter named
ExecutionPolicy reports errors as follows:
- If execution of a function invoked as part of the algorithm throws an exception,
policyis std::parallel_vector_execution_policy, std::terminate is called
policyis std::sequential_execution_policy or std::parallel_execution_policy, the algorithm exits with an std::exception_list containing all uncaught exceptions. If there was only one uncaught exception, the algorithm may rethrow it without wrapping in std::exception_list. It is unspecified how much work the algorithm will perform before returning after the first exception was encountered.
policyis some other type, the behavior is implementation-defined
- If the algorithm fails to allocate memory (either for itself or to construct an std::exception_list when handling a user exception), std::bad_alloc is thrown.
This function attempts to allocate a temporary buffer, typically by calling std::get_temporary_buffer. If the allocation fails, the less efficient algorithm is chosen.
3 2 4 5 7 0 0 0 0
 See also
| divides a range of elements into two groups |
| parallelized version of |