From 0bd31d33ade9eb7aaaccdf111b589ae264964eee Mon Sep 17 00:00:00 2001
From: Wolfgang Bangerth <bangerth@math.tamu.edu>
Date: Wed, 9 Mar 2016 07:49:29 -0600
Subject: [PATCH] Add another test.

---
 tests/base/task_12_capture.cc                 | 71 +++++++++++++++++++
 .../task_12_capture.with_cxx11=true.output    |  6 ++
 2 files changed, 77 insertions(+)
 create mode 100644 tests/base/task_12_capture.cc
 create mode 100644 tests/base/task_12_capture.with_cxx11=true.output

diff --git a/tests/base/task_12_capture.cc b/tests/base/task_12_capture.cc
new file mode 100644
index 0000000000..21c533061e
--- /dev/null
+++ b/tests/base/task_12_capture.cc
@@ -0,0 +1,71 @@
+// ---------------------------------------------------------------------
+//
+// Copyright (C) 2016 by the deal.II authors
+//
+// This file is part of the deal.II library.
+//
+// The deal.II library is free software; you can use it, redistribute
+// it, and/or modify it under the terms of the GNU Lesser General
+// Public License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+// The full text of the license can be found in the file LICENSE at
+// the top level of the deal.II distribution.
+//
+// ---------------------------------------------------------------------
+
+
+// verify that we can create tasks both via lambdas and via std::bind
+// expressions. this obviously requires C++11
+//
+// like the _12 test, but using lambda captures
+
+
+#include "../tests.h"
+#include <iomanip>
+#include <fstream>
+#include <unistd.h>
+
+#include <deal.II/base/thread_management.h>
+
+
+// return a double, to make sure we correctly identify the return type
+// of the expressions used in new_task(...)
+double test (int i)
+{
+  deallog << "Task " << i << " starting..." << std::endl;
+  sleep (1);
+  deallog << "Task " << i << " finished!" << std::endl;
+
+  return 3.141;
+}
+
+
+
+
+int main()
+{
+  std::ofstream logfile("output");
+  deallog.attach(logfile);
+  deallog.threshold_double(1.e-10);
+
+  int arg1=1;
+  int arg2=2;
+
+  Threads::TaskGroup<double> tg;
+  tg += Threads::new_task ([arg1]()   // capture arg1 by value
+  {
+    return test(arg1);
+  });
+  tg += Threads::new_task ([&arg2]()  // capture arg2 by reference
+  {
+    return test(arg2);
+  });
+
+  tg.join_all ();
+
+  deallog << "OK" << std::endl;
+
+  deallog.detach ();
+  logfile.close ();
+  sort_file_contents ("output");
+}
diff --git a/tests/base/task_12_capture.with_cxx11=true.output b/tests/base/task_12_capture.with_cxx11=true.output
new file mode 100644
index 0000000000..d239d4dd83
--- /dev/null
+++ b/tests/base/task_12_capture.with_cxx11=true.output
@@ -0,0 +1,6 @@
+DEAL::OK
+DEAL::Task 1 finished!
+DEAL::Task 1 starting...
+DEAL::Task 2 finished!
+DEAL::Task 2 starting...
+
-- 
2.39.5