完善代码

core/codes/codes.go

@@ -1,11 +1,14 @@
 package codes
 
+// A Code is an unsigned 32-bit error code as defined in the beego spec.
 type Code uint32
 
 const (
+	// SessionSessionStartError means func SessionStart error in session module.
 	SessionSessionStartError Code = 5001001
 )
 
+// CodeToStr is a map about Code and Code's message
 var CodeToStr = map[Code]string{
 	SessionSessionStartError : `"SESSION_MODULE_SESSION_START_ERROR"`,
-}
+}