2011-09-13 17:44:24 +00:00
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
< html xmlns = "http://www.w3.org/1999/xhtml" >
< head >
< meta http-equiv = "Content-Type" content = "text/html; charset=UTF-8" / >
< title > lower_bound< / title >
< link rel = "stylesheet" href = "apiReference.css" type = "text/css" / >
< meta name = "generator" content = "DocBook XSL Stylesheets V1.73.2" / >
< link rel = "start" href = "index.html" title = "Berkeley DB C++ Standard Template Library API Reference" / >
< link rel = "up" href = "db_map.html" title = "Chapter / >
< link rel = "prev" href = "stldb_mapfind.html" title = "find" / >
< link rel = "next" href = "stldb_mapequal_range.html" title = "equal_range" / >
< / head >
< body >
< div xmlns = "" class = "navheader" >
< div class = "libver" >
< p > Library Version 11.2.5.2< / p >
< / div >
< table width = "100%" summary = "Navigation header" >
< tr >
< th colspan = "3" align = "center" > lower_bound< / th >
< / tr >
< tr >
< td width = "20%" align = "left" > < a accesskey = "p" href = "stldb_mapfind.html" > Prev< / a > < / td >
< th width = "60%" align = "center" > Chapter
Db_map < / th >
< td width = "20%" align = "right" > < a accesskey = "n" href = "stldb_mapequal_range.html" > Next< / a > < / td >
< / tr >
< / table >
< hr / >
< / div >
< div class = "sect1" lang = "en" xml:lang = "en" >
< div class = "titlepage" >
< div >
< div >
< h2 class = "title" style = "clear: both" > < a id = "stldb_maplower_bound" > < / a > lower_bound< / h2 >
< / div >
< / div >
< / div >
< div class = "sect2" lang = "en" xml:lang = "en" >
< div class = "titlepage" >
< div >
< div >
< h3 class = "title" > < a id = "stldb_maplower_bound_details" > < / a > Function Details< / h3 >
< / div >
< / div >
< / div >
< pre class = "programlisting" >
const_iterator lower_bound(const key_type & x) const
< / pre >
< p > Find the greatest key less than or equal to x. < / p >
< div class = "sect3" lang = "en" xml:lang = "en" >
< div class = "titlepage" >
< div >
< div >
2011-12-20 00:07:10 +00:00
< h4 class = "title" > < a id = "id3602401" > < / a > Parameters< / h4 >
2011-09-13 17:44:24 +00:00
< / div >
< / div >
< / div >
< div class = "sect4" lang = "en" xml:lang = "en" >
< div class = "titlepage" >
< div >
< div >
2011-12-20 00:07:10 +00:00
< h5 class = "title" > < a id = "id3602880" > < / a > x< / h5 >
2011-09-13 17:44:24 +00:00
< / div >
< / div >
< / div >
< p > The target key to find. < / p >
< / div >
< / div >
< div class = "sect3" lang = "en" xml:lang = "en" >
< div class = "titlepage" >
< div >
< div >
2011-12-20 00:07:10 +00:00
< h4 class = "title" > < a id = "id3602858" > < / a > Return Value< / h4 >
2011-09-13 17:44:24 +00:00
< / div >
< / div >
< / div >
< p > The valid const iterator sitting on the key, or an invalid one. < / p >
< / div >
< div class = "sect3" lang = "en" xml:lang = "en" >
< div class = "titlepage" >
< div >
< div >
2011-12-20 00:07:10 +00:00
< h4 class = "title" > < a id = "id3602864" > < / a > See Also< / h4 >
2011-09-13 17:44:24 +00:00
< / div >
< / div >
< / div >
< p >
< / p >
< p > < a class = "ulink" href = "http://www.cplusplus.com/reference/stl/map/lower_bound/" target = "_top" > http://www.cplusplus.com/reference/stl/map/lower_bound/< / a > < / p >
< p >
< / p >
< / div >
< pre class = "programlisting" >
iterator lower_bound(const key_type & x,
bool readonly=false)
< / pre >
< p > Find the greatest key less than or equal to x. < / p >
< div class = "sect3" lang = "en" xml:lang = "en" >
< div class = "titlepage" >
< div >
< div >
2011-12-20 00:07:10 +00:00
< h4 class = "title" > < a id = "id3602691" > < / a > Parameters< / h4 >
2011-09-13 17:44:24 +00:00
< / div >
< / div >
< / div >
< div class = "sect4" lang = "en" xml:lang = "en" >
< div class = "titlepage" >
< div >
< div >
2011-12-20 00:07:10 +00:00
< h5 class = "title" > < a id = "id3602789" > < / a > x< / h5 >
2011-09-13 17:44:24 +00:00
< / div >
< / div >
< / div >
< p > The target key to find. < / p >
< / div >
< div class = "sect4" lang = "en" xml:lang = "en" >
< div class = "titlepage" >
< div >
< div >
2011-12-20 00:07:10 +00:00
< h5 class = "title" > < a id = "id3602756" > < / a > readonly< / h5 >
2011-09-13 17:44:24 +00:00
< / div >
< / div >
< / div >
< p > Whether the returned iterator is readonly. < / p >
< / div >
< / div >
< div class = "sect3" lang = "en" xml:lang = "en" >
< div class = "titlepage" >
< div >
< div >
2011-12-20 00:07:10 +00:00
< h4 class = "title" > < a id = "id3602761" > < / a > Return Value< / h4 >
2011-09-13 17:44:24 +00:00
< / div >
< / div >
< / div >
< p > The valid iterator sitting on the key, or an invalid one. < / p >
< / div >
< div class = "sect3" lang = "en" xml:lang = "en" >
< div class = "titlepage" >
< div >
< div >
2011-12-20 00:07:10 +00:00
< h4 class = "title" > < a id = "id3602874" > < / a > See Also< / h4 >
2011-09-13 17:44:24 +00:00
< / div >
< / div >
< / div >
< p >
< / p >
< p > < a class = "ulink" href = "http://www.cplusplus.com/reference/stl/map/lower_bound/" target = "_top" > http://www.cplusplus.com/reference/stl/map/lower_bound/< / a > < / p >
< p >
< / p >
< / div >
< / div >
< div class = "sect2" lang = "en" xml:lang = "en" >
< div class = "titlepage" >
< div >
< div >
2011-12-20 00:07:10 +00:00
< h3 class = "title" > < a id = "id3602441" > < / a > Group: Searching Functions< / h3 >
2011-09-13 17:44:24 +00:00
< / div >
< / div >
< / div >
< 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 >
< / div >
< div class = "sect2" lang = "en" xml:lang = "en" >
< div class = "titlepage" >
< div >
< div >
2011-12-20 00:07:10 +00:00
< h3 class = "title" > < a id = "id3602922" > < / a > Class< / h3 >
2011-09-13 17:44:24 +00:00
< / div >
< / div >
< / div >
< p >
< a class = "link" href = "db_map.html" title = "Chapter > db_map< / a >
< / p >
< / div >
< / div >
< div class = "navfooter" >
< hr / >
< table width = "100%" summary = "Navigation footer" >
< tr >
< td width = "40%" align = "left" > < a accesskey = "p" href = "stldb_mapfind.html" > Prev< / a > < / td >
< td width = "20%" align = "center" >
< a accesskey = "u" href = "db_map.html" > Up< / a >
< / td >
< td width = "40%" align = "right" > < a accesskey = "n" href = "stldb_mapequal_range.html" > Next< / a > < / td >
< / tr >
< tr >
< td width = "40%" align = "left" valign = "top" > find < / td >
< td width = "20%" align = "center" >
< a accesskey = "h" href = "index.html" > Home< / a >
< / td >
< td width = "40%" align = "right" valign = "top" > < / td >
< / tr >
< / table >
< / div >
< / body >
< / html >
