Make clippy happy

Author: sgrif

diesel/src/lib.rs

@@ -32,6 +32,8 @@
 #[macro_use]
 extern crate bitflags;
 extern crate byteorder;
+// This is required to make `diesel_derives` re-export, but clippy thinks its unused
+#[cfg_attr(feature = "clippy", allow(useless_attribute))]
 #[allow(unused_imports)]
 #[macro_use]
 extern crate diesel_derives;

diesel/src/pg/types/numeric.rs

@@ -127,7 +127,7 @@ mod bigdecimal {
             // First digit got factor 10_000^(digits.len() - 1), but should get 10_000^weight
             let correction_exp = 4 * (i64::from(weight) - count + 1);
             let result = BigDecimal::new(BigInt::from_biguint(sign, result), -correction_exp)
-                .with_scale(scale as i64);
+                .with_scale(i64::from(scale));
             Ok(result)
         }
     }

diesel_infer_schema/src/lib.rs

@@ -9,6 +9,7 @@
            warn(wrong_pub_self_convention, mut_mut, non_ascii_literal, similar_names,
                   unicode_not_nfc, if_not_else, items_after_statements, used_underscore_binding))]
 
+#[cfg_attr(feature = "clippy", allow(useless_attribute))]
 #[allow(unused_imports)]
 #[macro_use]
 extern crate infer_schema_macros;

diesel_migrations/src/lib.rs

@@ -10,6 +10,7 @@
                   unicode_not_nfc, if_not_else, items_after_statements, used_underscore_binding))]
 
 extern crate migrations_internals;
+#[cfg_attr(feature = "clippy", allow(useless_attribute))]
 #[allow(unused_imports)]
 #[macro_use]
 extern crate migrations_macros;