Imported from /home/lorry/working-area/delta_boost-tarball/boost_1_54_0.tar.bz2.boost_1_54_0baserock/morph

1 files changed, 35 insertions, 0 deletions

diff --git a/libs/local_function/example/add_local_functor.cpp b/libs/local_function/example/add_local_functor.cpp
new file mode 100644
index 000000000..e75f83f76
--- /dev/null
+++ b/libs/local_function/example/add_local_functor.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/detail/lightweight_test.hpp>
+
+//[add_local_functor
+int main(void) {
+    int sum = 0, factor = 10;
+
+    struct local_add { // Unfortunately, boilerplate code to program the class.
+        local_add(int& _sum, int _factor): sum(_sum), factor(_factor) {}
+
+        inline void operator()(int num) { // Body uses C++ statement syntax.
+            sum += factor * num;
+        }
+
+    private: // Unfortunately, cannot bind so repeat variable types.
+        int& sum; // Access `sum` by reference.
+        const int factor; // Make `factor` constant.
+    } add(sum, factor);
+    
+    add(1);
+    int nums[] = {2, 3};
+    // Unfortunately, cannot pass as template parameter to `std::for_each`.
+    for(size_t i = 0; i < 2; ++i) add(nums[i]);
+
+    BOOST_TEST(sum == 60);
+    return boost::report_errors();
+}
+//]
+