Some lint fixes for newer Rust

rslib/src/cloze.rs

@@ -146,10 +146,7 @@ impl ExtractedCloze<'_> {
 
     /// If cloze starts with image-occlusion:, return the text following that.
     fn image_occlusion(&self) -> Option<&str> {
-        let Some(first_node) = self.nodes.first() else {
+        let TextOrCloze::Text(text) = self.nodes.first()? else {
-            return None;
-        };
-        let TextOrCloze::Text(text) = first_node else {
             return None;
         };
         text.strip_prefix("image-occlusion:")

rslib/src/config/bool.rs

@@ -55,7 +55,11 @@ pub enum BoolKey {
 /// This is a workaround for old clients that used ints to represent boolean
 /// values. For new config items, prefer using a bool directly.
 #[derive(Deserialize, Default)]
-struct BoolLike(#[serde(deserialize_with = "deserialize_bool_from_anything")] bool);
+struct BoolLike(
+    #[serde(deserialize_with = "deserialize_bool_from_anything")]
+    #[allow(dead_code)]
+    bool,
+);
 
 impl Collection {
     pub fn get_config_bool(&self, key: BoolKey) -> bool {

rslib/src/image_occlusion/imagedata.rs

@@ -97,10 +97,12 @@ impl Collection {
         let idxs = nt.get_io_field_indexes()?;
 
         cloze_note.occlusions = parse_image_occlusions(fields[idxs.occlusions as usize].as_str());
-        cloze_note.header = fields[idxs.header as usize].clone();
+        cloze_note.header.clone_from(&fields[idxs.header as usize]);
-        cloze_note.back_extra = fields[idxs.back_extra as usize].clone();
+        cloze_note
+            .back_extra
+            .clone_from(&fields[idxs.back_extra as usize]);
         cloze_note.image_data = "".into();
-        cloze_note.tags = note.tags.clone();
+        cloze_note.tags.clone_from(&note.tags);
 
         let image_file_name = &fields[idxs.image as usize];
         let src = self

rslib/src/import_export/package/apkg/import/decks.rs

@@ -157,7 +157,7 @@ impl Deck {
 fn update_normal_with_other(normal: &mut NormalDeck, other: &NormalDeck) {
     if !other.description.is_empty() {
         normal.markdown_description = other.markdown_description;
-        normal.description = other.description.clone();
+        normal.description.clone_from(&other.description);
     }
     if other.config_id != 1 {
         normal.config_id = other.config_id;

rslib/src/notes/mod.rs

@@ -663,7 +663,7 @@ mod test {
         // match the python implementation for now
         assert_eq!(anki_base91(0), "");
         assert_eq!(anki_base91(1), "b");
-        assert_eq!(anki_base91(u64::max_value()), "Rj&Z5m[>Zp");
+        assert_eq!(anki_base91(u64::MAX), "Rj&Z5m[>Zp");
         assert_eq!(anki_base91(1234567890), "saAKk");
     }
 

rslib/src/scheduler/fsrs/retention.rs

@@ -71,8 +71,7 @@ impl Collection {
                         .is_ok()
                 },
             )?
-            .max(0.75)
+            .clamp(0.75, 0.95) as f32)
-            .min(0.95) as f32)
     }
 
     pub fn get_optimal_retention_parameters(
@@ -226,10 +225,10 @@ impl Collection {
     }
 }
 
-fn median_secs(group: &Vec<u32>) -> f64 {
+fn median_secs(group: &[u32]) -> f64 {
     let length = group.len();
     if length > 0 {
-        let mut group_vec = group.clone();
+        let mut group_vec = group.to_vec();
         group_vec.sort_unstable();
         let median_millis = if length % 2 == 0 {
             let mid = length / 2;