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upper_bound
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const_iterator upper_bound(const key_type &x) const
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<p>Find the least key greater than x. </p>
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x </h5>
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<p>The target key to find. </p>
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<p>The valid iterator sitting on the key, or an invalid one. </p>
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<p><a class="ulink" href="http://www.cplusplus.com/reference/stl/map/upper_bound/" target="_top">http://www.cplusplus.com/reference/stl/map/upper_bound/</a> </p>
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iterator upper_bound(const key_type &x,
bool readonly=false)
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<p>Find the least key greater than x. </p>
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x </h5>
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<p>The target key to find. </p>
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readonly </h5>
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<p>Whether the returned iterator is readonly. </p>
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Return Value</h4>
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<p>The valid iterator sitting on the key, or an invalid one. </p>
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<p><a class="ulink" href="http://www.cplusplus.com/reference/stl/map/upper_bound/" target="_top">http://www.cplusplus.com/reference/stl/map/upper_bound/</a> </p>
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Group: Searching Functions</h3>
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<p>The following functions are returning iterators, and they by default return read-write iterators.</p>
<p>If you intend to use the returned iterator only to read, you should call the const version of each function using a const reference to this container. Using const iterators can potentially promote concurrency a lot. You can also set the readonly parameter to each non-const version of the functions to true if you don't use the returned iterator to write, which also promotes concurrency and overall performance. </p>
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