Remove #[allow(missing_docs)] in generated code.

Author: Yamakaky

.travis.yml

@@ -21,6 +21,7 @@ before_script:
 script:
 - cargo build --verbose $FEATURES
 - cargo test --verbose $FEATURES
+- cd test-doc && cargo build
 
 after_success:
 - travis-cargo --only stable doc

src/error_chain.rs

@@ -166,9 +166,9 @@ macro_rules! error_chain_processed {
         quick_error! {
             /// The kind of an error
             #[derive(Debug)]
-            #[allow(missing_docs)]
             pub enum $error_kind_name {
 
+                /// A convenient variant for String.
                 Msg(s: String) {
                     description(&s)
                     display("{}", s)

test-doc/src/lib.rs

@@ -12,9 +12,13 @@ pub mod doc {
 
     error_chain! {
         links {
-            inner::Error, Test;
+            inner::Error, Test, #[doc = "Doc"];
+        }
+        foreign_links {
+            ::std::io::Error, Io, #[doc = "Io"];
         }
         errors {
+            /// Doc
             Test2 {
 
             }

tests/tests.rs

@@ -407,3 +407,23 @@ fn without_result() {
     }
     let _: Result<(), ()> = Ok(());
 }
+
+#[test]
+fn documentation() {
+    mod inner {
+        error_chain! {}
+    }
+
+    error_chain! {
+        links {
+            inner::Error, Inner, #[doc = "Doc"];
+        }
+        foreign_links {
+            ::std::io::Error, Io, #[doc = "Doc"];
+        }
+        errors {
+            /// Doc
+            Variant
+        }
+    }
+}