1 files changed, 40 insertions, 0 deletions
diff --git a/parser.h b/parser.h
new file mode 100644
index 0000000..e4299dc
--- /dev/null
+++ b/parser.h
@@ -0,0 +1,40 @@
+#include <stack>
+#include <string>
+#include <sstream>
+#include <exception>
+#include <boost/lexical_cast.hpp>
+
+#include "tree.h"
+
+struct ParserResult 
+{
+	double result;
+	string tree;	
+};
+
+class Parser
+{
+	public:
+		ParserResult calculate(string, bool);
+	
+	private:
+	 	int getPriority(char);
+	 	vector<string>* lexer(string);
+	 	Node* buildTree(Tree**, string);
+};
+
+class parenthese_exception: public exception
+{
+	virtual const char* what() const throw()
+	{
+		return "Invalid parenthesized expression - check your input term.";
+	}
+};
+
+class operator_exception: public exception
+{
+	virtual const char* what() const throw()
+	{
+		return "Unexpected operator placement - check your input term.";
+	}
+};