Included previously missing exceptions header

2 files changed, 30 insertions, 1 deletions

diff --git a/README.md b/README.md
index 46284c9..a2745af 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ The implementation itself does not use any external libraries and relies fully o
 - Support for brackets
 - Export of the expression tree as [Graphviz](http://www.graphviz.org/) dot for visualization
 
-## Requirements
+## Requirements:
 
 - C++ compiler with support for new C++11 and STL features such as the auto keyword and unique_ptr (tested with GCC 4.7.2 on Linux)
 - [GoogleTest](http://code.google.com/p/googletest/) for tests
diff --git a/src/exceptions.h b/src/exceptions.h
new file mode 100644
index 0000000..cd76368
--- /dev/null
+++ b/src/exceptions.h
@@ -0,0 +1,29 @@
+#ifndef PARSER_SRC_EXCEPTIONS_H_
+#define PARSER_SRC_EXCEPTIONS_H_
+
+#include <exception>
+
+namespace SimpleParser {
+
+class parenthese_exception: public std::exception {
+	virtual const char* what() const throw() {
+		return "Invalid parenthesized expression - check your input term.";
+	}
+};
+
+class operator_exception: public std::exception {
+	virtual const char* what() const throw() {
+		return "Unexpected operator placement - check your input term.";
+	}
+};
+
+class divide_exception: public std::exception {
+	virtual const char* what() const throw()
+	{
+		return "A divison through zero had to be prevented by the parser - check your input term.";
+	}
+};
+
+}
+
+#endif  // PARSER_SRC_EXCEPTIONS_H_