chore(tvix): fix trivial clippy lints

Relates to b/321.

Change-Id: I37284f89b186e469eb432e2bbedb37aa125a6ad4
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9961
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
Autosubmit: tazjin <tazjin@tvl.su>

tvix/eval/src/value/attrs.rs

@@ -301,7 +301,7 @@ impl NixAttrs {
 
     /// Same as iter(), but marks call sites which rely on the
     /// iteration being lexicographic.
-    pub fn iter_sorted<'a>(&'a self) -> Iter<KeyValue<'a>> {
+    pub fn iter_sorted(&self) -> Iter<KeyValue<'_>> {
         self.iter()
     }
 
@@ -399,7 +399,7 @@ impl NixAttrs {
             // /another/ set with a __toString attr.
             let s = generators::request_string_coerce(co, result, kind).await;
 
-            return Some(s.ok()?);
+            return s.ok();
         }
 
         None

tvix/eval/src/value/json.rs

@@ -12,7 +12,7 @@ use serde_json::Value as Json; // name clash with *our* `Value`
 use serde_json::{Map, Number};
 
 impl Value {
-    pub(crate) async fn to_json(
+    pub(crate) async fn into_json(
         self,
         co: &GenCo,
     ) -> Result<Result<Json, CatchableErrorKind>, ErrorKind> {
@@ -86,8 +86,8 @@ impl Value {
 
     /// Generator version of the above, which wraps responses in
     /// Value::Json.
-    pub(crate) async fn to_json_generator(self, co: GenCo) -> Result<Value, ErrorKind> {
-        match self.to_json(&co).await? {
+    pub(crate) async fn into_json_generator(self, co: GenCo) -> Result<Value, ErrorKind> {
+        match self.into_json(&co).await? {
             Err(cek) => Ok(Value::Catchable(cek)),
             Ok(json) => Ok(Value::Json(json)),
         }

tvix/eval/src/value/list.rs

@@ -59,7 +59,7 @@ impl NixList {
             stack_slice.len(),
         );
 
-        NixList(Rc::new(Vector::from_iter(stack_slice.into_iter())))
+        NixList(Rc::new(Vector::from_iter(stack_slice)))
     }
 
     pub fn iter(&self) -> vector::Iter<Value> {
@@ -76,7 +76,7 @@ impl NixList {
 
     #[deprecated(note = "callers should avoid constructing from Vec")]
     pub fn from_vec(vs: Vec<Value>) -> Self {
-        Self(Rc::new(Vector::from_iter(vs.into_iter())))
+        Self(Rc::new(Vector::from_iter(vs)))
     }
 
     /// Asynchronous sorting algorithm in which the comparator can make use of

tvix/eval/src/value/mod.rs

@@ -97,7 +97,7 @@ where
     Value: From<V>,
 {
     fn from(v: Result<V, CatchableErrorKind>) -> Value {
-        v.map_or_else(|cek| Value::Catchable(cek), |v| v.into())
+        v.map_or_else(Value::Catchable, |v| v.into())
     }
 }
 
@@ -362,7 +362,7 @@ impl Value {
                 kind,
             }),
 
-            (c @ Value::Catchable(_), _) => return Ok(c),
+            (c @ Value::Catchable(_), _) => Ok(c),
 
             (Value::AttrNotFound, _)
             | (Value::Blueprint(_), _)
@@ -762,11 +762,10 @@ fn total_fmt_float<F: std::fmt::Write>(num: f64, mut f: F) -> std::fmt::Result {
         if !new_s.is_empty() {
             s = &mut new_s
         }
-    }
-    // else, if this is not scientific notation, and there's a
-    // decimal point, make sure we really drop trailing zeroes.
-    // In some cases, lexical_core doesn't.
-    else if s.contains(&b'.') {
+    } else if s.contains(&b'.') {
+        // else, if this is not scientific notation, and there's a
+        // decimal point, make sure we really drop trailing zeroes.
+        // In some cases, lexical_core doesn't.
         for (i, c) in s.iter().enumerate() {
             // at `.``
             if c == &b'.' {

tvix/eval/src/value/string.rs

@@ -176,10 +176,10 @@ fn nix_escape_char(ch: char, next: Option<&char>) -> Option<&'static str> {
 /// parsed as identifiers.  See also cppnix commit
 /// b72bc4a972fe568744d98b89d63adcd504cb586c.
 fn is_keyword(s: &str) -> bool {
-    match s {
-        "if" | "then" | "else" | "assert" | "with" | "let" | "in" | "rec" | "inherit" => true,
-        _ => false,
-    }
+    matches!(
+        s,
+        "if" | "then" | "else" | "assert" | "with" | "let" | "in" | "rec" | "inherit"
+    )
 }
 
 /// Return true if this string can be used as an identifier in Nix.