add errorcode names

errorcode/errorcode.go

@@ -2,6 +2,10 @@ package errorcode
 
 type ErrorCode int
 
+func (code ErrorCode) String() string {
+	return ErrorNames[code]
+}
+
 const (
 	E_OK         ErrorCode = 10 /* No error */
 	E_EOF        ErrorCode = 11 /* End Of File */
@@ -21,5 +25,4 @@ const (
 	E_LINECONT   ErrorCode = 25 /* Unexpected characters after a line continuation */
 	E_IDENTIFIER ErrorCode = 26 /* Invalid characters in identifier */
 	E_BADSINGLE  ErrorCode = 27 /* Ill-formed single statement input */
-
 )

errorcode/names.go

@@ -0,0 +1,22 @@
+package errorcode
+
+var ErrorNames = [...]string{
+	E_OK:         "E_OK",
+	E_EOF:        "E_EOF",
+	E_INTR:       "E_INTR",
+	E_TOKEN:      "E_TOKEN",
+	E_SYNTAX:     "E_SYNTAX",
+	E_NOMEM:      "E_NOMEM",
+	E_DONE:       "E_DONE",
+	E_ERROR:      "E_ERROR",
+	E_TABSPACE:   "E_TABSPACE",
+	E_OVERFLOW:   "E_OVERFLOW",
+	E_TOODEEP:    "E_TOODEEP",
+	E_DEDENT:     "E_DEDENT",
+	E_DECODE:     "E_DECODE",
+	E_EOFS:       "E_EOFS",
+	E_EOLS:       "E_EOLS",
+	E_LINECONT:   "E_LINECONT",
+	E_IDENTIFIER: "E_IDENTIFIER",
+	E_BADSINGLE:  "E_BADSINGLE",
+}