Книга: Standard Template Library Programmer

remove_copy_if

remove_copy_if

Category: algorithms

Component type: function

template <class InputIterator, class OutputIterator, class Predicate>
OutputIterator remove_copy_if(InputIterator first, InputIterator last, OutputIterator result, Predicate pred);

Remove_copy_if copies elements from the range [first, last) to a range beginning at result , except that elements for which pred is true are not copied. The return value is the end of the resulting range. This operation is stable, meaning that the relative order of the elements that are copied is the same as in the range [first, last).

Defined in the standard header algorithm, and in the nonstandard backward-compatibility header algo.h.

• InputIterator is a model of Input Iterator.

• OutputIterator is a model of Output Iterator.

• InputIterator's value type is convertible to a type in OutputIterator's set of value types.

• Predicate is a model of Predicate.

• InputIterator's value type is convertible to Predicate's argument type.

• [first, last) is a valid range.

• There is enough space in the output range to store the copied values. That is, if there are n elements in [first, last) that do not satisfy pred, then [result, result+n) is a valid range.

• result is not an iterator in the range [first, last).

Linear. Exactly last – first applications of pred , and at most last – first assignments.

Fill a vector with the nonnegative elements of another vector.

vector<int> V1;
V.push_back(-2);
V.push_back(0);
V.push_back(-1);
V.push_back(0);
V.push_back(1);
V.push_back(2);
vector<int> V2; remove_copy_if(V1.begin(), V1.end(), back_inserter(V2), bind2nd(less<int>(), 0));

copy, remove, remove_if, remove_copy, unique, unique_copy.

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