Switch to Rust 2021 edition

Cargo.toml

@@ -3,7 +3,7 @@ name = "lombok"
 version = "0.3.3"
 description = "Lombok port for Rust"
 authors = ["sokomishalov <sokomishalov@mail.ru>"]
-edition = "2018"
+edition = "2021"
 readme = "README.md"
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/sokomishalov/lombok-rs"

src/equals_and_hash_code.rs

@@ -62,7 +62,7 @@ pub(crate) fn equals_and_hash_code(input: TokenStream) -> TokenStream {
         use std::hash::{Hash, Hasher};
 
         impl #impl_generics #name #ty_generics #where_clause {
-            fn equals(&self, other: &#name#ty_generics) -> bool {
+            fn equals(&self, other: &#name #ty_generics) -> bool {
                 self.eq(&other)
             }
 
@@ -74,7 +74,7 @@ pub(crate) fn equals_and_hash_code(input: TokenStream) -> TokenStream {
         }
 
         impl #impl_generics ::core::cmp::PartialEq for #name #ty_generics #where_clause {
-            fn eq(&self, other: &#name#ty_generics) -> bool {
+            fn eq(&self, other: &#name #ty_generics) -> bool {
                 match *other {
                     #name {
                         #(
@@ -94,7 +94,7 @@ pub(crate) fn equals_and_hash_code(input: TokenStream) -> TokenStream {
                 }
             }
 
-            fn ne(&self, other: &TestNamedStructure#ty_generics) -> bool {
+            fn ne(&self, other: &#name #ty_generics) -> bool {
                 match *other {
                     #name {
                         #(

src/to_string.rs

@@ -1,6 +1,5 @@
 use proc_macro::TokenStream;
 
-
 use quote::{format_ident, quote};
 
 use crate::utils::syn::{named_fields, parse_derive_input};

tests/tests.rs

@@ -18,7 +18,7 @@ pub struct TestNamedStructure<'a> {
     age: u8,
     nick: &'a str,
     languages: Vec<String>,
-    hobby: Box<String>,
+    hobby: Box<&'a str>,
 }
 
 #[cfg(test)]
@@ -42,7 +42,7 @@ mod tests {
         *default.get_age_mut() = 10;
         *default.get_nick_mut() = "another";
         *default.get_languages_mut() = vec!["python".to_string()];
-        *default.get_hobby_mut() = Box::new("tennis".to_string());
+        *default.get_hobby_mut() = Box::new("tennis");
 
         let copy = TestNamedStructure::default();