Fix linting (#1245)

Cargo.toml

@@ -1,10 +1,11 @@
 [workspace]
+resolver = "2"
 members = [
   "cmd/ein",
   "lib/app",
   "lib/ffi",
   "lib/infra",
   "lib/lang",
-  "lib/prelude/ffi"
+  "lib/prelude/ffi",
 ]
 exclude = ["tmp"]

cmd/ein/Cargo.toml

@@ -2,7 +2,7 @@
 name = "ein"
 version = "0.1.0"
 authors = ["Yota Toyama <[email protected]>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]
 app = { path = "../../lib/app" }

lib/app/Cargo.toml

@@ -2,7 +2,7 @@
 name = "app"
 version = "0.1.0"
 authors = ["Yota Toyama <[email protected]>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]
 lang = { path = "../lang" }

lib/app/src/common/file_path.rs

@@ -30,15 +30,12 @@ impl FilePath {
             format!(".{extension}")
         };
 
-        Self::new(
-            self.components().take(self.components.len() - 1).chain(
-                vec![regex::Regex::new(r"(\..*)?$")
+        Self::new(self.components().take(self.components.len() - 1).chain(
+            vec![regex::Regex::new(r"(\..*)?$")
                     .unwrap()
                     .replace(self.components.iter().last().unwrap(), replacement.as_str())
-                    .deref()]
-                .into_iter(),
-            ),
-        )
+                    .deref()],
+        ))
     }
 
     pub fn join(&self, file_path: &Self) -> Self {

lib/ffi/Cargo.toml

@@ -3,7 +3,7 @@ name = "ein-ffi"
 description = "FFI library for Ein programming language"
 version = "0.6.0"
 publish = true
-edition = "2018"
+edition = "2021"
 license = "MIT"
 authors = ["Yota Toyama <[email protected]>"]
 repository = "https://github.com/ein-lang/ein"

lib/ffi/src/arc.rs

@@ -22,7 +22,7 @@ impl<T> Arc<T> {
 
         Self {
             block,
-            phantom: PhantomData::default(),
+            phantom: PhantomData,
         }
     }
 }
@@ -45,7 +45,7 @@ impl<T> Clone for Arc<T> {
     fn clone(&self) -> Self {
         Self {
             block: self.block.clone(),
-            phantom: PhantomData::default(),
+            phantom: PhantomData,
         }
     }
 }

lib/infra/Cargo.toml

@@ -2,7 +2,7 @@
 name = "infra"
 version = "0.1.0"
 authors = ["Yota Toyama <[email protected]>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]
 app = { path = "../app" }

lib/lang/src/compile/transform/let_error_transformer.rs

@@ -39,8 +39,8 @@ impl LetErrorTransformer {
             let_.source_information().clone(),
         );
 
-        let_.definitions().iter().rev().fold(
-            Ok(let_.expression().clone()),
+        let_.definitions().iter().rev().try_fold(
+            let_.expression().clone(),
             |expression, variable_definition| {
                 let ok_type = variable_definition.type_().clone();
 
@@ -55,7 +55,7 @@ impl LetErrorTransformer {
                     variable_definition.name(),
                     variable_definition.body().clone(),
                     vec![
-                        Alternative::new(ok_type, expression?),
+                        Alternative::new(ok_type, expression),
                         Alternative::new(
                             error_type.clone(),
                             self.coerce_type(

lib/lang/src/path/module_path.rs

@@ -56,7 +56,7 @@ impl ModulePath {
         .into_iter()
         .chain(self.components.iter())
         .map(|component| component.as_str())
-        .chain(vec![name].into_iter())
+        .chain(vec![name])
         .collect::<Vec<_>>()
         .join(".")
     }

lib/prelude/ffi/Cargo.toml

@@ -2,7 +2,7 @@
 name = "prelude"
 version = "0.1.0"
 publish = false
-edition = "2018"
+edition = "2021"
 
 [lib]
 name = "prelude"