split LyXText::rowlist_ into individual Paragraph::rows_ chunks

[lyx.git] / src / support / lyxalgo.h

diff --git a/src/support/lyxalgo.h b/src/support/lyxalgo.h
index 6c6c7994ca3db5259403089d6e25c1d98ddbed85..6bccfb12966bd75906e70470d093882dd2d9965d 100644 (file)
--- a/src/support/lyxalgo.h
+++ b/src/support/lyxalgo.h
@@ -1,10 +1,24 @@
 // -*- C++ -*-
+/**
+ * \file lyxalgo.h
+ * This file is part of LyX, the document processor.
+ * Licence details can be found in the file COPYING.
+ *
+ * \author Lars Gullik Bjønnes
+ *
+ * Full author contact details are available in file CREDITS
+ *
+ * A variety of useful templates.
+ */
 
 #ifndef LYX_ALGO_H
 #define LYX_ALGO_H
 
 #include <utility>
 #include <iterator>
+#include <algorithm>
+#include <set>
+
 
 namespace lyx {
 
@@ -43,9 +57,13 @@ struct firster {
 };
 
 
+/**
+ * copy elements in the given range to the output iterator
+ * if the predicate evaluates as true
+ */
 template <class InputIter, class OutputIter, class Func>
 OutputIter copy_if(InputIter first, InputIter last,
-              OutputIter result, Func func) 
+              OutputIter result, Func func)
 {
        for (; first != last; ++first) {
                if (func(*first)) {
@@ -62,15 +80,31 @@ typename std::iterator_traits<Iterator>::difference_type
 count (Iterator first, Iterator last, T const & value)
 {
 #ifdef HAVE_STD_COUNT
-        return std::count(first, last, value);
+       return std::count(first, last, value);
 #else
-        std::iterator_traits<Iterator>::difference_type n = 0;
-       while (first != last) 
+       std::iterator_traits<Iterator>::difference_type n = 0;
+       while (first != last)
                if (*first++ == value) ++n;
        return n;
 #endif
 }
 
+/// Remove all duplicate entries in c.
+template<class C>
+void eliminate_duplicates(C & c)
+{
+       C unique_c;
+       std::set<typename C::value_type> s;
+
+       for (typename C::iterator p = c.begin(); p != c.end(); ++p) {
+               if (s.find(*p) == s.end()) {
+                       unique_c.push_back(*p);
+                       s.insert(*p);
+               }
+       }
+       swap(c, unique_c);
+}
+
 } // namespace lyx
 
-#endif
+#endif // LYX_ALGO_H