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Description

Merge combines two sorted ranges [first1, last1) and [first2, last2) into a single sorted range. That is, it copies elements from [first1, last1) and [first2, last2) into [result, result + (last1 – first1) + (last2 – first2)) such that the resulting range is in ascending order. Merge is stable, meaning both that the relative order of elements within each input range is preserved, and that for equivalent [1] elements in both input ranges the element from the first range precedes the element from the second. The return value is result + (last1 – first1) + (last2 – first2).

The two versions of merge differ in how elements are compared. The first version uses operator<. That is, the input ranges and the output range satisfy the condition that for every pair of iterators i and j such that i precedes j, *j < *i is false. The second version uses the function object comp. That is, the input ranges and the output range satisfy the condition that for every pair of iterators i and j such that i precedes j, comp(*j, *i) is false.


Prototype | Standard Template Library Programmer`s Guide | Definition







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