diff --git a/simplecpp.cpp b/simplecpp.cpp
index 1c006b0..6fdc03a 100755
--- a/simplecpp.cpp
+++ b/simplecpp.cpp
@@ -476,6 +476,13 @@ simplecpp::TokenList::TokenList(std::istream &istr, std::vector<std::string> &fi
     readfile(stream,filename,outputList);
 }
 
+simplecpp::TokenList::TokenList(const std::string &str, std::vector<std::string> &filenames, const std::string &filename, OutputList *outputList)
+    : frontToken(nullptr), backToken(nullptr), files(filenames)
+{
+    StdStringStream stream(str);
+    readfile(stream,filename,outputList);
+}
+
 simplecpp::TokenList::TokenList(const std::string &filename, std::vector<std::string> &filenames, OutputList *outputList)
         : frontToken(nullptr), backToken(nullptr), files(filenames)
 {
diff --git a/simplecpp.h b/simplecpp.h
index 8723837..f627c27 100755
--- a/simplecpp.h
+++ b/simplecpp.h
@@ -198,6 +198,8 @@ namespace simplecpp {
         explicit TokenList(std::vector<std::string> &filenames);
         /** generates a token list from the given std::istream parameter */
         TokenList(std::istream &istr, std::vector<std::string> &filenames, const std::string &filename=std::string(), OutputList *outputList = nullptr);
+        /** generates a token list from the given std::string parameter */
+        TokenList(const std::string &str, std::vector<std::string> &filenames, const std::string &filename=std::string(), OutputList *outputList = nullptr);
         /** generates a token list from the given filename parameter */
         TokenList(const std::string &filename, std::vector<std::string> &filenames, OutputList *outputList = nullptr);
         TokenList(const TokenList &other);