fixed clippy warnings

proc-macros/src/config_source/mod.rs

@@ -10,10 +10,9 @@ use proc_macro::TokenStream;
 use syn::{parse_macro_input, DeriveInput};
 
 use generate::generate;
+use parse::parse_input;
 use process::process;
 
-use self::parse::parse_input;
-
 /// Implements the ConfigSource derive macro
 ///
 /// # Arguments:

proc-macros/src/config_source/process.rs

@@ -72,8 +72,5 @@ fn path_is_option(path: &Path) -> bool {
 /// # Arguments
 /// * `ty` - Struct field type to check.
 fn is_option(ty: &Type) -> bool {
-    match ty {
-        Type::Path(typepath) if typepath.qself.is_none() && path_is_option(&typepath.path) => true,
-        _ => false,
-    }
+    matches!(ty, Type::Path(typepath) if typepath.qself.is_none() && path_is_option(&typepath.path))
 }

proc-macros/src/lib.rs

@@ -55,5 +55,5 @@ use proc_macro::TokenStream;
 /// This allows for Structs to be used as a `Source` for configuration through the `config` crate.
 #[proc_macro_derive(ConfigSource)]
 pub fn config_source(ts: TokenStream) -> TokenStream {
-    config_source::config_source(ts).into()
+    config_source::config_source(ts)
 }