Initial boost-regex++ release

[SVN r7845]

old_include/tests/snip5.cpp

@@ -0,0 +1,36 @@
+#include <string>
+#include <map>
+#include <regex>
+
+// purpose:
+// takes the contents of a file in the form of a string
+// and searches for all the C++ class definitions, storing
+// their locations in a map of strings/int's
+
+typedef std::map<std::string, int, std::less<std::string> > map_type;
+
+regex expression("^(template[[:space:]]*<[^;:{]+>[[:space:]]*)?(class|struct)[[:space:]]*(\\<\\w+\\>([[:blank:]]*\\([^)]*\\))?[[:space:]]*)*(\\<\\w*\\>)[[:space:]]*(<[^;:{]+>[[:space:]]*)?(\\{|:[^;\\{()]*\\{)");
+map_type class_index;
+std::string::const_iterator base;
+
+bool grep_callback(const reg_match<std::string::const_iterator, regex::alloc_type>& what)
+{
+   // what[0] contains the whole string
+   // what[5] contains the class name.
+   // what[6] contains the template specialisation if any.
+   // add class name and position to map:
+   class_index[std::string(what[5].first, what[5].second) + std::string(what[6].first, what[6].second)] = 
+               what[5].first - base;
+   return true;
+}
+
+void IndexClasses(const std::string& file)
+{
+   std::string::const_iterator start, end;
+   start = file.begin();
+   end = file.end();
+   base = start;
+   reg_grep(grep_callback, start, end, expression, match_default);
+}
+
+