Imported Upstream version 1.51.0upstream/1.51.0

1 files changed, 34 insertions, 0 deletions

diff --git a/libs/local_function/example/add_cxx11_lambda.cpp b/libs/local_function/example/add_cxx11_lambda.cpp
new file mode 100644
index 0000000000..d7085bba17
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+++ b/libs/local_function/example/add_cxx11_lambda.cpp
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+
+// Copyright (C) 2009-2012 Lorenzo Caminiti
+// Distributed under the Boost Software License, Version 1.0
+// (see accompanying file LICENSE_1_0.txt or a copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+// Home at http://www.boost.org/libs/local_function
+
+#include <boost/config.hpp>
+#ifdef BOOST_NO_LAMBDAS
+#   error "lambda functions required"
+#else
+
+#include <boost/detail/lightweight_test.hpp>
+#include <algorithm>
+
+//[add_cxx11_lambda
+int main(void) {                            // Some local scope.
+    int sum = 0, factor = 10;               // Variables in scope to bind.
+    
+    auto add = [factor, &sum](int num) {    // C++11 only.
+        sum += factor * num;
+    };
+    
+    add(1);                                 // Call the lambda.
+    int nums[] = {2, 3};
+    std::for_each(nums, nums + 2, add);     // Pass it to an algorithm.
+    
+    BOOST_TEST(sum == 60);                  // Assert final summation value.
+    return boost::report_errors();
+}
+//]
+
+#endif
+