The number of comparisons will be logarithmic (and as few as possible). The number of steps through the sequence will be logarithmic for random-access iterators (e.g., pointers), and linear otherwise.
The LWG has passed Defect Report 270, which notes: The proposed resolution reinterprets binary search. Instead of thinking about searching for a value in a sorted range, we view that as an important special case of a more general algorithm: searching for the partition point in a partitioned range. We also add a guarantee that the old wording did not: we ensure that the upper bound is no earlier than the lower bound, that the pair returned by equal_range is a valid range, and that the first part of that pair is the lower bound.
The actual effect of the first sentence is that a comparison functor passed by the user doesn't necessarily need to induce a strict weak ordering relation. Rather, it partitions the range.
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Determines whether an element exists in a range.
The comparison function should have the same effects on ordering as the function used for the initial sort. Definition at line 3941 of file stl_algo.h. References std::lower_bound(). |
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Determines whether an element exists in a range.
Definition at line 3909 of file stl_algo.h. References std::lower_bound(). |
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Finds the largest subrange in which val could be inserted at any place in it without changing the ordering.
but does not actually call those functions. Definition at line 3851 of file stl_algo.h. References std::advance(), std::distance(), std::lower_bound(), and std::upper_bound(). |
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Finds the largest subrange in which val could be inserted at any place in it without changing the ordering.
but does not actually call those functions. Definition at line 3789 of file stl_algo.h. References std::advance(), std::distance(), std::lower_bound(), and std::upper_bound(). |
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Finds the first position in which val could be inserted without changing the ordering.
Definition at line 2665 of file stl_algo.h. References std::advance(), and std::distance(). Referenced by map< Key, Type, Compare, Allocator >::operator[](). |
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Finds the first position in which val could be inserted without changing the ordering.
Definition at line 2610 of file stl_algo.h. References std::advance(), and std::distance(). Referenced by std::binary_search(), and std::equal_range(). |
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Finds the last position in which val could be inserted without changing the ordering.
Definition at line 2764 of file stl_algo.h. References std::advance(), and std::distance(). |
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Finds the last position in which val could be inserted without changing the ordering.
Definition at line 2712 of file stl_algo.h. References std::advance(), and std::distance(). Referenced by std::equal_range(). |