Add a new example.

[SVN r18925]

v2/example/customization/codegen.cpp

@@ -0,0 +1,37 @@
+// (C) Copyright Vladimir Prus, 2003
+// Permission to copy, use, modify, sell and distribute this software
+// is granted provided this copyright notice appears in all copies.
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+
+// Please see 'usage.verbatim' file for usage notes.
+
+#include <iostream>
+#include <string>
+#include <cstring>
+using std::cout;
+using std::string;
+using std::strlen;
+
+extern const char class_template[];
+extern const char usage[];
+
+int main(int ac, char* av[])
+{
+    if (av[1]) {        
+
+        string class_name = av[1];
+        string s = class_template;
+        
+        string::size_type n;
+        while((n = s.find("%class_name%")) != string::npos) {
+            s.replace(n, strlen("%class_name%"), class_name);
+        }
+        std::cout << "Output is:\n";
+        std::cout << s << "\n";        
+        return 0;
+    } else {
+        std::cout << usage << "\n";
+        return 1;
+    }
+}