--- a/rust/src/config.rs	Thu Feb 23 23:27:09 2017 +0800
+++ b/rust/src/config.rs	Tue Feb 28 22:58:47 2017 +0800
@@ -5,6 +5,8 @@
 use std::io::Read;
 use serde::{Serialize,Deserialize,Deserializer,Serializer};
 
+use types::*;
+
 #[derive(Deserialize,Serialize,Debug,Clone)]
 #[allow(non_snake_case)]
 pub struct Config {
@@ -69,7 +71,7 @@
         toml::to_string(self).unwrap()
     }
 
-    pub fn merge(&self, conf: &str) -> Result<Self, Box<Error>> {
+    pub fn merge(&self, conf: &str) -> Result<Self, TemplogError> {
         // convert existing and new toml into tables, combine them.
         let mut new_toml = toml::from_str(conf)?;
         let mut ex_val = toml::Value::try_from(self).unwrap();
@@ -80,7 +82,7 @@
         Ok(ret)
     }
 
-    pub fn merge_file(&self, filename: &str) -> Result<Self, Box<Error>> {
+    pub fn merge_file(&self, filename: &str) -> Result<Self, TemplogError> {
 
         let mut s = String::new();
         File::open(filename)?.read_to_string(&mut s)?;