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diff --git a/devtools/swigwin-1.3.34/Lib/ruby/rubyfragments.swg b/devtools/swigwin-1.3.34/Lib/ruby/rubyfragments.swg
new file mode 100644
index 0000000..3c3b658
--- /dev/null
+++ b/devtools/swigwin-1.3.34/Lib/ruby/rubyfragments.swg
@@ -0,0 +1,23 @@
+/*
+
+  Create a file with this name, 'rubyfragments.swg', in your working
+  directory and add all the %fragments you want to take precedence
+  over the ones defined by default by swig.
+
+  For example, if you add:
+  
+  %fragment(SWIG_AsVal_frag(int),"header") {
+   SWIGINTERNINLINE int
+   SWIG_AsVal(int)(VALUE obj, int *val)
+   { 
+     <your code here>;
+   }
+  }
+  
+  this will replace the code used to retrieve an integer value for all
+  the typemaps that need it, including:
+  
+    int, std::vector<int>, std::list<std::pair<int,int> >, etc.
+
+    
+*/