Utils/Statistics: added operator[] member to get const & Collector in StatisticsBase

[senf.git] / senf / Utils / Statistics.cc

diff --git a/senf/Utils/Statistics.cc b/senf/Utils/Statistics.cc
index 10f603e..5c24563 100644 (file)
--- a/senf/Utils/Statistics.cc
+++ b/senf/Utils/Statistics.cc
@@ -62,6 +62,15 @@ prefix_ senf::Collector & senf::StatisticsBase::operator[](unsigned rank)
     return i->second;
 }
 
+prefix_ senf::Collector const & senf::StatisticsBase::operator[](unsigned rank)
+    const
+{
+    Children::const_iterator i (children_.find(rank));
+    if (i == children_.end())
+        throw InvalidRankException();
+    return i->second;
+}
+
 prefix_ senf::Collector & senf::StatisticsBase::collect(unsigned rank)
 {
     std::pair<Children::iterator, bool> state (