Added file needed by utility/build/Jamfile.v2

[SVN r2631]

include/boost/utility/trace_scope_stk.hpp

@@ -0,0 +1,46 @@
+#ifndef UTILITY_TRACE_SCOPE_STK_HPP
+#define UTILITY_TRACE_SCOPE_STK_HPP
+#include <vector>
+#include "boost/utility/trace_scope.hpp"
+namespace utility
+{
+struct trace_scope_stk
+  : public trace_scope
+  //Purpose:
+  //  Simply keeps a stack variables of
+  //  type trace_scope_stk
+  {
+  public:
+        static
+      std::string const&
+    top_name(void)
+      { return c_scope_names.back()
+      ;}
+        static
+      std::string const
+    top_result(bool result_bool)
+      { std::string  result_string(c_scope_names.back())
+      ; result_string += std::string(":result=")
+      ; result_string += c_test_results[result_bool]
+      ; return result_string
+      ;}
+    trace_scope_stk(std::string const& a_name)
+      : trace_scope(a_name)
+      { c_scope_names.push_back(a_name)
+      ;}
+    ~trace_scope_stk(void)
+      { c_scope_names.pop_back()
+      ;}
+  private:
+        static
+      std::vector<std::string>
+    c_scope_names
+      ;
+        static
+      std::string const
+    c_test_results[2]
+      ;
+  };
+}//exit utility namespace
+#endif
+