From 65f17438de5983ca010e10b4b24c5da65756a9b5 Mon Sep 17 00:00:00 2001
From: Teddy <ted.sybil@gmail.com>
Date: Sun, 4 Aug 2013 11:50:41 +0800
Subject: added exception facilities

---
 exc.h | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 exc.h

(limited to 'exc.h')

diff --git a/exc.h b/exc.h
new file mode 100644
index 0000000..7a6879d
--- /dev/null
+++ b/exc.h
@@ -0,0 +1,37 @@
+#ifndef EXC_H
+#define EXC_H
+
+#include "consts.h"
+#include <string>
+
+using std::string;
+
+/** @class GeneralError
+ * The top-level exception
+ */
+class GeneralError {
+    public:
+        virtual string get_msg() = 0;   /**< Extract error message */
+};
+
+class SyntaxError : public GeneralError {
+    protected:
+        string msg;                     /**< Error mesg */
+        ErrCode code;                   /**< Error code */
+    public:
+
+        SyntaxError(ErrCode code);          /**< Construct an SyntaxError */ 
+        string get_msg();                   /**< Get the error message */
+};
+
+class TokenError : public SyntaxError {
+    public:
+        TokenError(string token, ErrCode code);     /**< Construct an TokenError */
+};
+
+class NormalError : public SyntaxError {
+    public:
+        NormalError(ErrCode code);
+};
+
+#endif
-- 
cgit v1.2.3