test file for using boost::function and BLL together

[SVN r12877]

test/bll_and_function.cpp

@@ -0,0 +1,64 @@
+//  bll_and_function.cpp  --------------------------------
+
+// test using BLL and boost::function
+
+#define BOOST_INCLUDE_MAIN  // for testing, include rather than link
+#include <boost/test/test_tools.hpp>    // see "Header Implementation Option"
+
+#include "boost/lambda/lambda.hpp"
+
+#include "boost/function.hpp"
+
+#include <vector>
+#include <map>
+#include <set>
+#include <string>
+
+
+using namespace boost::lambda;
+
+using namespace std;
+
+void test_function() {
+
+  boost::function<int, int, int> f;
+  f = unlambda(_1 + _2);
+
+  // unlambda must be used, because boost::function tries to take the 
+  // address of the function object that is assigned. However, the
+  // operator& is overloaded for lambda functors, which creates a conflict
+
+ BOOST_TEST(f(1, 2)== 3);
+
+ int i=1; int j=2;
+ boost::function<int&, int&, int> g = unlambda(_1 += _2);
+ g(i, j);
+ BOOST_TEST(i==3);
+
+
+
+  int* sum = new int();
+  *sum = 0;
+  boost::function<int&, int> counter = unlambda(*sum += _1);
+  counter(5); // ok, sum* = 5;
+  BOOST_TEST(*sum == 5);
+  delete sum; 
+  
+  // The next statement would lead to a dangling reference
+  // counter(3); // error, *sum does not exist anymore
+
+}
+
+
+int test_main(int, char *[]) {
+
+  test_function();
+
+  return 0;
+}
+
+
+
+
+
+