Run clippy

3 files changed, 29 insertions, 28 deletions

diff --git a/dhall/src/semantics/nze/env.rs b/dhall/src/semantics/nze/env.rs
index 55050ed..ef2bee6 100644
--- a/dhall/src/semantics/nze/env.rs
+++ b/dhall/src/semantics/nze/env.rs
@@ -72,14 +72,14 @@ impl<Type: Clone> ValEnv<Type> {
         env.items.push(EnvItem::Replaced(e, ty));
         env
     }
-    pub fn lookup_val(&self, var: &AlphaVar) -> NirKind {
+    pub fn lookup_val(&self, var: AlphaVar) -> NirKind {
         let idx = self.items.len() - 1 - var.idx();
         match &self.items[idx] {
             EnvItem::Kept(_) => NirKind::Var(NzVar::new(idx)),
             EnvItem::Replaced(x, _) => x.kind().clone(),
         }
     }
-    pub fn lookup_ty(&self, var: &AlphaVar) -> Type {
+    pub fn lookup_ty(&self, var: AlphaVar) -> Type {
         let idx = self.items.len() - 1 - var.idx();
         match &self.items[idx] {
             EnvItem::Kept(ty) | EnvItem::Replaced(_, ty) => ty.clone(),
diff --git a/dhall/src/semantics/nze/nir.rs b/dhall/src/semantics/nze/nir.rs
index 4ed66b7..32ef590 100644
--- a/dhall/src/semantics/nze/nir.rs
+++ b/dhall/src/semantics/nze/nir.rs
@@ -162,8 +162,8 @@ impl Nir {
             )
         };
 
-        let hir = match &*self.kind() {
-            NirKind::Var(v) => HirKind::Var(venv.lookup(v)),
+        let hir = match self.kind() {
+            NirKind::Var(v) => HirKind::Var(venv.lookup(*v)),
             NirKind::AppliedBuiltin(closure) => closure.to_hirkind(venv),
             self_kind => HirKind::Expr(match self_kind {
                 NirKind::Var(..) | NirKind::AppliedBuiltin(..) => {
@@ -317,13 +317,13 @@ impl NirKind {
                 }
             }
             NirKind::UnionType(kts) | NirKind::UnionConstructor(_, kts) => {
-                for x in kts.values().flat_map(|opt| opt) {
+                for x in kts.values().flatten() {
                     x.normalize();
                 }
             }
             NirKind::UnionLit(_, v, kts) => {
                 v.normalize();
-                for x in kts.values().flat_map(|opt| opt) {
+                for x in kts.values().flatten() {
                     x.normalize();
                 }
             }
@@ -503,7 +503,7 @@ impl std::fmt::Debug for Nir {
         if let NirKind::Const(c) = kind {
             return write!(fmt, "{:?}", c);
         }
-        let mut x = fmt.debug_struct(&format!("Nir@WHNF"));
+        let mut x = fmt.debug_struct("Nir");
         x.field("kind", kind);
         x.finish()
     }
diff --git a/dhall/src/semantics/nze/normalize.rs b/dhall/src/semantics/nze/normalize.rs
index 27862ee..08e3e87 100644
--- a/dhall/src/semantics/nze/normalize.rs
+++ b/dhall/src/semantics/nze/normalize.rs
@@ -209,6 +209,7 @@ fn apply_binop<'a>(o: BinOp, x: &'a Nir, y: &'a Nir) -> Option<Ret<'a>> {
     })
 }
 
+#[allow(clippy::cognitive_complexity)]
 pub(crate) fn normalize_one_layer(expr: ExprKind<Nir>, env: &NzEnv) -> NirKind {
     use LitKind::Bool;
     use NirKind::{
@@ -286,17 +287,17 @@ pub(crate) fn normalize_one_layer(expr: ExprKind<Nir>, env: &NzEnv) -> NirKind {
             None => Ret::Expr(expr),
         },
 
-        ExprKind::Field(ref v, ref l) => match v.kind() {
-            RecordLit(kvs) => match kvs.get(l) {
+        ExprKind::Field(ref v, ref field) => match v.kind() {
+            RecordLit(kvs) => match kvs.get(field) {
                 Some(r) => Ret::Nir(r.clone()),
                 None => Ret::Expr(expr),
             },
             UnionType(kts) => {
-                Ret::NirKind(UnionConstructor(l.clone(), kts.clone()))
+                Ret::NirKind(UnionConstructor(field.clone(), kts.clone()))
             }
             PartialExpr(ExprKind::Projection(x, _)) => {
                 return normalize_one_layer(
-                    ExprKind::Field(x.clone(), l.clone()),
+                    ExprKind::Field(x.clone(), field.clone()),
                     env,
                 )
             }
@@ -305,31 +306,31 @@ pub(crate) fn normalize_one_layer(expr: ExprKind<Nir>, env: &NzEnv) -> NirKind {
                 x,
                 y,
             )) => match (x.kind(), y.kind()) {
-                (_, RecordLit(kvs)) => match kvs.get(l) {
+                (_, RecordLit(kvs)) => match kvs.get(field) {
                     Some(r) => Ret::Nir(r.clone()),
                     None => {
                         return normalize_one_layer(
-                            ExprKind::Field(x.clone(), l.clone()),
+                            ExprKind::Field(x.clone(), field.clone()),
                             env,
                         )
                     }
                 },
-                (RecordLit(kvs), _) => match kvs.get(l) {
+                (RecordLit(kvs), _) => match kvs.get(field) {
                     Some(r) => Ret::Expr(ExprKind::Field(
                         Nir::from_kind(PartialExpr(ExprKind::BinOp(
                             BinOp::RightBiasedRecordMerge,
                             Nir::from_kind(RecordLit(
-                                Some((l.clone(), r.clone()))
+                                Some((field.clone(), r.clone()))
                                     .into_iter()
                                     .collect(),
                             )),
                             y.clone(),
                         ))),
-                        l.clone(),
+                        field.clone(),
                     )),
                     None => {
                         return normalize_one_layer(
-                            ExprKind::Field(y.clone(), l.clone()),
+                            ExprKind::Field(y.clone(), field.clone()),
                             env,
                         )
                     }
@@ -338,42 +339,42 @@ pub(crate) fn normalize_one_layer(expr: ExprKind<Nir>, env: &NzEnv) -> NirKind {
             },
             PartialExpr(ExprKind::BinOp(BinOp::RecursiveRecordMerge, x, y)) => {
                 match (x.kind(), y.kind()) {
-                    (RecordLit(kvs), _) => match kvs.get(l) {
+                    (RecordLit(kvs), _) => match kvs.get(field) {
                         Some(r) => Ret::Expr(ExprKind::Field(
                             Nir::from_kind(PartialExpr(ExprKind::BinOp(
                                 BinOp::RecursiveRecordMerge,
                                 Nir::from_kind(RecordLit(
-                                    Some((l.clone(), r.clone()))
+                                    Some((field.clone(), r.clone()))
                                         .into_iter()
                                         .collect(),
                                 )),
                                 y.clone(),
                             ))),
-                            l.clone(),
+                            field.clone(),
                         )),
                         None => {
                             return normalize_one_layer(
-                                ExprKind::Field(y.clone(), l.clone()),
+                                ExprKind::Field(y.clone(), field.clone()),
                                 env,
                             )
                         }
                     },
-                    (_, RecordLit(kvs)) => match kvs.get(l) {
+                    (_, RecordLit(kvs)) => match kvs.get(field) {
                         Some(r) => Ret::Expr(ExprKind::Field(
                             Nir::from_kind(PartialExpr(ExprKind::BinOp(
                                 BinOp::RecursiveRecordMerge,
                                 x.clone(),
                                 Nir::from_kind(RecordLit(
-                                    Some((l.clone(), r.clone()))
+                                    Some((field.clone(), r.clone()))
                                         .into_iter()
                                         .collect(),
                                 )),
                             ))),
-                            l.clone(),
+                            field.clone(),
                         )),
                         None => {
                             return normalize_one_layer(
-                                ExprKind::Field(x.clone(), l.clone()),
+                                ExprKind::Field(x.clone(), field.clone()),
                                 env,
                             )
                         }
@@ -452,7 +453,7 @@ pub(crate) fn normalize_one_layer(expr: ExprKind<Nir>, env: &NzEnv) -> NirKind {
             }
             RecordLit(kvs) => Ret::NirKind(NEListLit(
                 kvs.iter()
-                    .sorted_by_key(|(k, _)| k.clone())
+                    .sorted_by_key(|(k, _)| *k)
                     .map(|(k, v)| {
                         let mut rec = HashMap::new();
                         rec.insert("mapKey".into(), Nir::from_text(k));
@@ -476,13 +477,13 @@ pub(crate) fn normalize_one_layer(expr: ExprKind<Nir>, env: &NzEnv) -> NirKind {
 /// Normalize Hir into WHNF
 pub(crate) fn normalize_hir_whnf(env: &NzEnv, hir: &Hir) -> NirKind {
     match hir.kind() {
-        HirKind::Var(var) => env.lookup_val(var),
+        HirKind::Var(var) => env.lookup_val(*var),
         HirKind::Import(hir, _) => normalize_hir_whnf(env, hir),
         HirKind::Expr(ExprKind::Lam(binder, annot, body)) => {
             let annot = annot.eval(env);
             NirKind::LamClosure {
                 binder: Binder::new(binder.clone()),
-                annot: annot,
+                annot,
                 closure: Closure::new(env, body.clone()),
             }
         }