1 files changed, 23 insertions, 1 deletions

diff --git a/Parser.h b/Parser.h
index 58d062f..2124eab 100644
--- a/Parser.h
+++ b/Parser.h
@@ -2,16 +2,38 @@
 
 #include <iostream>
 #include <istream>
+#include <exception>
+#include <vector>
 
 using std::istream;
 using std::string;
+using std::vector;
+
+class ParserException : public std::exception {
+public:
+	ParserException(const char * fmt, ...);
+	~ParserException();
+	const char * what();
+
+private:
+	char * error = NULL;
+};
 
 class Parser {
 public:
 	void parse(string input) const;
+	void parse(istream & input) const;
+
+	/**
+	 * \brief preprocess (filter) line of input
+	 *
+	 * normalize whitespace and remove comments
+	 */
+	static size_t filter(char * input);
+
+	void handle_line(string label, vector<string> nodes) const;
 
 private:
-	istream & parse(const Parser & parser, istream & s) const;
 	friend istream & operator << (const Parser & parser, istream & s);
 	friend istream & operator >> (istream & s, const Parser & parser);
 };