fix: compile error

Author: hengfeiyang

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "dotenv_config"
-version = "0.2.0"
+version = "0.2.1"
 edition = "2021"
 authors = ["Hengfei Yang <[email protected]>"]
 description = "parse `env` to config struct for Rust"

examples/config.rs

@@ -24,7 +24,7 @@ struct Redis {
 
 fn main() {
     dotenv().ok();
-    let cfg = Config::init().unwrap();
+    let cfg = Config::init().expect("config init error");
     println!("{:#?}", cfg);
     assert!(cfg.server_addr == "192.168.2.1");
     assert!(!cfg.server_mode);

src/lib.rs

@@ -80,7 +80,7 @@ mod builder;
 pub fn derive_env_config(input: TokenStream) -> TokenStream {
     // println!("{:#?}", input);
     builder::BuilderContext::render(input)
-        .unwrap()
+        .expect("render error")
         .parse()
-        .unwrap()
+        .expect("parse error")
 }

templates/builder.j2

@@ -25,7 +25,7 @@ impl {{ name }} {
         help_map
     }
 
-    pub fn init() -> Result<{{ name }}, String> {
+    pub fn init() -> Result<{{ name }}, &'static str> {
         let mut key: &str;
         {% for field in fields %}
         {% if field.attr_name.is_empty() %}
@@ -37,7 +37,9 @@ impl {{ name }} {
         let {{ field.name }}: Option<{{ field.typ }}> = match std::env::var(key) {
             Ok(val) => match val.to_lowercase().parse() {
                 Ok(v) => Some(v),
-                Err(_) => {return Err(format!("{}: except a value of [{{ field.typ }}]", key));},
+                Err(_) => {
+                    panic!("EnvConfig: {} except a value of [{{ field.typ }}]", key);
+                },
             },
             Err(err) => {
                 {% if field.attr_default.is_empty() %}
@@ -62,7 +64,9 @@ impl {{ name }} {
         let {{ field.name }}: Option<{{ field.typ }}> = match std::env::var(key) {
             Ok(val) => match val.parse::<{{ field.typ }}>() {
                 Ok(v) => Some(v),
-                Err(_) => {return Err(format!("{}: except a value of [{{ field.typ }}]", key));},
+                 Err(_) => {
+                    panic!("EnvConfig: {} except a value of [{{ field.typ }}]", key);
+                },
             },
             Err(_) => {
                 {% if field.attr_default.is_empty() %}