[Positioning] Fix/add some Doxygen comments

owlps-positioning/src/result.cc

@@ -31,6 +31,9 @@ bool Result::operator==(const Result &source) const
 
 
 
+/**
+ * @return the result as a CSV string, \em without trailing '\n'.
+ */
 const string Result::to_csv() const
 {
   ostringstream csv_line ;

owlps-positioning/src/resultlist.cc

@@ -45,6 +45,9 @@ bool ResultList::operator==(const ResultList &source) const
 /* *** Conversion accessors *** */
 
 
+/**
+ * @return the results as a CSV string, \em without trailing '\n'.
+ */
 const string ResultList::to_csv() const
 {
   ostringstream csv_line ;

owlps-positioning/src/resultlist.hh

@@ -7,6 +7,8 @@ class Request ;
 #include <vector>
 #include <ostream>
 
+/// \brief List of \link Result results \endlink of a single Request,
+/// computed by one or more positioning algorithm
 class ResultList
 {
 protected:

owlps-positioning/src/waypoint.cc

@@ -76,7 +76,7 @@ bool Waypoint::operator==(const Waypoint &wp) const
 }
 
 
-Waypoint::operator string() const
+Waypoint::operator std::string() const
 {
   ostringstream csv ;
   csv << (Point3D) *this ;