From 5a9eeba05f991e866c986a0bb1eaed912c083c91 Mon Sep 17 00:00:00 2001
From: "Brian M. Adams" <briadam@sandia.gov>
Date: Tue, 3 Oct 2017 14:15:39 -0600
Subject: [PATCH] Utility to convert container to whitespace-separated string

In support of libqueso/queso#569
---
 src/misc/inc/Miscellaneous.h |  4 ++++
 src/misc/src/Miscellaneous.C | 16 ++++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/src/misc/inc/Miscellaneous.h b/src/misc/inc/Miscellaneous.h
index 094db1a46..602631b79 100644
--- a/src/misc/inc/Miscellaneous.h
+++ b/src/misc/inc/Miscellaneous.h
@@ -80,6 +80,10 @@ void MiscComputePositionsBetweenMinMax(V minValues, V maxValues,
 template <class V1,class V2>
 void MiscCheckTheParallelEnvironment(const V1& vec1, const V2& vec2);
 
+//! Convert container contents to space-separated string, omitting trailing whitespace
+template<typename T>
+std::string container_to_string(const T& container);
+
 }  // End namespace QUESO
 
 #endif // UQ_MISCELLANEOUS_H
diff --git a/src/misc/src/Miscellaneous.C b/src/misc/src/Miscellaneous.C
index a8a00592c..6591ce6f4 100644
--- a/src/misc/src/Miscellaneous.C
+++ b/src/misc/src/Miscellaneous.C
@@ -30,6 +30,7 @@
 #include <sys/time.h>
 #include <iostream>
 #include <fstream>
+#include <sstream>
 #include <libgen.h>
 #include <sys/stat.h>
 #include <cmath>
@@ -595,8 +596,23 @@ MiscCheckTheParallelEnvironment(const V1& vec1, const V2& vec2)
   return;
 }
 
+
+template<typename T>
+std::string container_to_string(const T& container)
+{
+  std::ostringstream oss;
+  typename T::const_iterator it = container.begin();
+  for ( ; it != container.end(); ++it) {
+    if (it != container.begin())
+      oss << ' ';
+    oss << *it;
+  }
+  return oss.str();
+}
+
 }  // End namespace QUESO
 
 template void QUESO::MiscCheckTheParallelEnvironment<QUESO::GslVector, QUESO::GslVector>(QUESO::GslVector const&, QUESO::GslVector const&);
 template bool QUESO::MiscCheckForSameValueInAllNodes<bool>(bool&, double, QUESO::MpiComm const&, char const*);
 template bool QUESO::MiscCheckForSameValueInAllNodes<double>(double&, double, QUESO::MpiComm const&, char const*);
+template std::string QUESO::container_to_string(const std::set<unsigned int>& container);