Address Clippy lints

43 files changed, 148 insertions, 173 deletions

diff --git a/clippy.toml b/clippy.toml
new file mode 100644
index 00000000..0d4e02f0
--- /dev/null
+++ b/clippy.toml
@@ -0,0 +1 @@
+too-many-arguments-threshold = 20
diff --git a/futures/src/subscription.rs b/futures/src/subscription.rs
index 0085886d..0479c63c 100644
--- a/futures/src/subscription.rs
+++ b/futures/src/subscription.rs
@@ -183,11 +183,7 @@ where
 
         let mapper = self.mapper;
 
-        Box::pin(
-            self.recipe
-                .stream(input)
-                .map(move |element| mapper(element)),
-        )
+        Box::pin(self.recipe.stream(input).map(mapper))
     }
 }
 
diff --git a/futures/src/subscription/tracker.rs b/futures/src/subscription/tracker.rs
index 2cf98284..5717fdb9 100644
--- a/futures/src/subscription/tracker.rs
+++ b/futures/src/subscription/tracker.rs
@@ -127,7 +127,7 @@ where
             futures.push(Box::pin(future));
         }
 
-        self.subscriptions.retain(|id, _| alive.contains(&id));
+        self.subscriptions.retain(|id, _| alive.contains(id));
 
         futures
     }
diff --git a/glow/src/program.rs b/glow/src/program.rs
index 9a02d578..1eb9c535 100644
--- a/glow/src/program.rs
+++ b/glow/src/program.rs
@@ -70,7 +70,7 @@ impl Shader {
         unsafe {
             let shader = gl.create_shader(stage).expect("Cannot create shader");
 
-            gl.shader_source(shader, &content);
+            gl.shader_source(shader, content);
             gl.compile_shader(shader);
 
             if !gl.get_shader_compile_status(shader) {
diff --git a/glow/src/quad/compatibility.rs b/glow/src/quad/compatibility.rs
index 76f98ab7..7224e206 100644
--- a/glow/src/quad/compatibility.rs
+++ b/glow/src/quad/compatibility.rs
@@ -110,10 +110,8 @@ impl Pipeline {
         bounds: Rectangle<u32>,
     ) {
         // TODO: Remove this allocation (probably by changing the shader and removing the need of two `position`)
-        let vertices: Vec<Vertex> = instances
-            .iter()
-            .flat_map(|quad| Vertex::from_quad(quad))
-            .collect();
+        let vertices: Vec<Vertex> =
+            instances.iter().flat_map(Vertex::from_quad).collect();
 
         // TODO: Remove this allocation (or allocate only when needed)
         let indices: Vec<i32> = (0..instances.len().min(MAX_QUADS) as i32)
@@ -187,13 +185,13 @@ impl Pipeline {
                 gl.buffer_sub_data_u8_slice(
                     glow::ARRAY_BUFFER,
                     0,
-                    bytemuck::cast_slice(&vertices),
+                    bytemuck::cast_slice(vertices),
                 );
 
                 gl.buffer_sub_data_u8_slice(
                     glow::ELEMENT_ARRAY_BUFFER,
                     0,
-                    bytemuck::cast_slice(&indices),
+                    bytemuck::cast_slice(indices),
                 );
 
                 gl.draw_elements(
diff --git a/glow/src/quad/core.rs b/glow/src/quad/core.rs
index f37300f6..3e51b1ca 100644
--- a/glow/src/quad/core.rs
+++ b/glow/src/quad/core.rs
@@ -154,7 +154,7 @@ impl Pipeline {
                 gl.buffer_sub_data_u8_slice(
                     glow::ARRAY_BUFFER,
                     0,
-                    bytemuck::cast_slice(&instances),
+                    bytemuck::cast_slice(instances),
                 );
 
                 gl.draw_arrays_instanced(
diff --git a/glow/src/text.rs b/glow/src/text.rs
index 0d45d61b..37ccdece 100644
--- a/glow/src/text.rs
+++ b/glow/src/text.rs
@@ -54,7 +54,7 @@ impl Pipeline {
         #[cfg(target_arch = "wasm32")]
         let draw_brush_builder = draw_brush_builder.draw_cache_align_4x4(true);
 
-        let draw_brush = draw_brush_builder.build(&gl);
+        let draw_brush = draw_brush_builder.build(gl);
 
         let measure_brush =
             glyph_brush::GlyphBrushBuilder::using_font(font).build();
@@ -180,7 +180,8 @@ impl Pipeline {
                 }
                 b_count += utf8_len;
             }
-            return byte_index;
+
+            byte_index
         };
 
         if !nearest_only {
diff --git a/graphics/src/layer.rs b/graphics/src/layer.rs
index 93506258..af545713 100644
--- a/graphics/src/layer.rs
+++ b/graphics/src/layer.rs
@@ -202,7 +202,7 @@ impl<'a> Layer<'a> {
                 Self::process_primitive(
                     layers,
                     translation + *new_translation,
-                    &content,
+                    content,
                     current_layer,
                 );
             }
@@ -210,7 +210,7 @@ impl<'a> Layer<'a> {
                 Self::process_primitive(
                     layers,
                     translation,
-                    &cache,
+                    cache,
                     current_layer,
                 );
             }
diff --git a/graphics/src/widget/canvas/path.rs b/graphics/src/widget/canvas/path.rs
index 1728f060..47786224 100644
--- a/graphics/src/widget/canvas/path.rs
+++ b/graphics/src/widget/canvas/path.rs
@@ -74,7 +74,7 @@ impl Path {
 pub(super) fn dashed(path: &Path, line_dash: LineDash<'_>) -> Path {
     Path::new(|builder| {
         let segments_odd = (line_dash.segments.len() % 2 == 1).then(|| {
-            [&line_dash.segments[..], &line_dash.segments[..]].concat()
+            [line_dash.segments, line_dash.segments].concat()
         });
 
         let mut draw_line = false;
@@ -103,8 +103,7 @@ pub(super) fn dashed(path: &Path, line_dash: LineDash<'_>) -> Path {
                 },
                 index: line_dash.offset,
                 intervals: segments_odd
-                    .as_ref()
-                    .map(Vec::as_slice)
+                    .as_deref()
                     .unwrap_or(line_dash.segments),
             },
         );
diff --git a/graphics/src/widget/canvas/path/builder.rs b/graphics/src/widget/canvas/path/builder.rs
index d04dbdde..2f1f85a0 100644
--- a/graphics/src/widget/canvas/path/builder.rs
+++ b/graphics/src/widget/canvas/path/builder.rs
@@ -53,7 +53,7 @@ impl Builder {
             let _ = self.raw.line_to(a);
         }
 
-        let _ = self.raw.arc_to(
+        self.raw.arc_to(
             math::Vector::new(radius, radius),
             math::Angle::radians(0.0),
             path::ArcFlags::default(),
diff --git a/graphics/src/widget/qr_code.rs b/graphics/src/widget/qr_code.rs
index 1eb862ba..86a27fd0 100644
--- a/graphics/src/widget/qr_code.rs
+++ b/graphics/src/widget/qr_code.rs
@@ -67,10 +67,7 @@ where
         let side_length = (self.state.width + 2 * QUIET_ZONE) as f32
             * f32::from(self.cell_size);
 
-        layout::Node::new(Size::new(
-            f32::from(side_length),
-            f32::from(side_length),
-        ))
+        layout::Node::new(Size::new(side_length, side_length))
     }
 
     fn draw(
diff --git a/native/src/hasher.rs b/native/src/hasher.rs
index 9f6aacce..fa52f16d 100644
--- a/native/src/hasher.rs
+++ b/native/src/hasher.rs
@@ -1,13 +1,7 @@
 /// The hasher used to compare layouts.
-#[derive(Debug)]
+#[derive(Debug, Default)]
 pub struct Hasher(twox_hash::XxHash64);
 
-impl Default for Hasher {
-    fn default() -> Self {
-        Hasher(twox_hash::XxHash64::default())
-    }
-}
-
 impl core::hash::Hasher for Hasher {
     fn write(&mut self, bytes: &[u8]) {
         self.0.write(bytes)
diff --git a/native/src/overlay/menu.rs b/native/src/overlay/menu.rs
index 979a13c3..0c25200c 100644
--- a/native/src/overlay/menu.rs
+++ b/native/src/overlay/menu.rs
@@ -174,9 +174,9 @@ where
 
         Self {
             container,
-            width: width,
+            width,
             target_height,
-            style: style,
+            style,
         }
     }
 }
@@ -230,7 +230,7 @@ where
         shell: &mut Shell<'_, Message>,
     ) -> event::Status {
         self.container.on_event(
-            event.clone(),
+            event,
             layout,
             cursor_position,
             renderer,
@@ -326,7 +326,8 @@ where
         use std::f32;
 
         let limits = limits.width(Length::Fill).height(Length::Shrink);
-        let text_size = self.text_size.unwrap_or(renderer.default_size());
+        let text_size =
+            self.text_size.unwrap_or_else(|| renderer.default_size());
 
         let size = {
             let intrinsic = Size::new(
@@ -366,8 +367,9 @@ where
                 let bounds = layout.bounds();
 
                 if bounds.contains(cursor_position) {
-                    let text_size =
-                        self.text_size.unwrap_or(renderer.default_size());
+                    let text_size = self
+                        .text_size
+                        .unwrap_or_else(|| renderer.default_size());
 
                     *self.hovered_option = Some(
                         ((cursor_position.y - bounds.y)
@@ -380,8 +382,9 @@ where
                 let bounds = layout.bounds();
 
                 if bounds.contains(cursor_position) {
-                    let text_size =
-                        self.text_size.unwrap_or(renderer.default_size());
+                    let text_size = self
+                        .text_size
+                        .unwrap_or_else(|| renderer.default_size());
 
                     *self.hovered_option = Some(
                         ((cursor_position.y - bounds.y)
@@ -430,7 +433,8 @@ where
         let appearance = theme.appearance(self.style);
         let bounds = layout.bounds();
 
-        let text_size = self.text_size.unwrap_or(renderer.default_size());
+        let text_size =
+            self.text_size.unwrap_or_else(|| renderer.default_size());
         let option_height = (text_size + self.padding.vertical()) as usize;
 
         let offset = viewport.y - bounds.y;
diff --git a/native/src/program/state.rs b/native/src/program/state.rs
index 7ec2a04f..2ddde2c2 100644
--- a/native/src/program/state.rs
+++ b/native/src/program/state.rs
@@ -113,7 +113,7 @@ where
             &mut messages,
         );
 
-        messages.extend(self.queued_messages.drain(..));
+        messages.append(&mut self.queued_messages);
         self.queued_events.clear();
         debug.event_processing_finished();
 
diff --git a/native/src/user_interface.rs b/native/src/user_interface.rs
index 97a004e7..ef6f437e 100644
--- a/native/src/user_interface.rs
+++ b/native/src/user_interface.rs
@@ -430,7 +430,7 @@ where
         overlay
             .as_ref()
             .and_then(|layout| {
-                root.overlay(Layout::new(&base), renderer).map(|overlay| {
+                root.overlay(Layout::new(base), renderer).map(|overlay| {
                     let overlay_interaction = overlay.mouse_interaction(
                         Layout::new(layout),
                         cursor_position,
diff --git a/native/src/widget/checkbox.rs b/native/src/widget/checkbox.rs
index 9e7f183a..a49d2fa2 100644
--- a/native/src/widget/checkbox.rs
+++ b/native/src/widget/checkbox.rs
@@ -158,7 +158,10 @@ where
                 Text::new(&self.label)
                     .font(self.font.clone())
                     .width(self.width)
-                    .size(self.text_size.unwrap_or(renderer.default_size())),
+                    .size(
+                        self.text_size
+                            .unwrap_or_else(|| renderer.default_size()),
+                    ),
             )
             .layout(renderer, limits)
     }
diff --git a/native/src/widget/pane_grid.rs b/native/src/widget/pane_grid.rs
index eb969dbf..70ca772c 100644
--- a/native/src/widget/pane_grid.rs
+++ b/native/src/widget/pane_grid.rs
@@ -835,8 +835,7 @@ fn hovered_split<'a>(
 ) -> Option<(Split, Axis, Rectangle)> {
     splits
         .filter_map(|(split, (axis, region, ratio))| {
-            let bounds =
-                axis.split_line_bounds(*region, *ratio, f32::from(spacing));
+            let bounds = axis.split_line_bounds(*region, *ratio, spacing);
 
             if bounds.contains(cursor_position) {
                 Some((*split, *axis, bounds))
diff --git a/native/src/widget/pane_grid/node.rs b/native/src/widget/pane_grid/node.rs
index af6573a0..cc304b96 100644
--- a/native/src/widget/pane_grid/node.rs
+++ b/native/src/widget/pane_grid/node.rs
@@ -36,14 +36,11 @@ impl Node {
 
         std::iter::from_fn(move || {
             while let Some(node) = unvisited_nodes.pop() {
-                match node {
-                    Node::Split { id, a, b, .. } => {
-                        unvisited_nodes.push(a);
-                        unvisited_nodes.push(b);
+                if let Node::Split { id, a, b, .. } = node {
+                    unvisited_nodes.push(a);
+                    unvisited_nodes.push(b);
 
-                        return Some(id);
-                    }
-                    _ => {}
+                    return Some(id);
                 }
             }
 
@@ -124,12 +121,9 @@ impl Node {
     }
 
     pub(crate) fn update(&mut self, f: &impl Fn(&mut Node)) {
-        match self {
-            Node::Split { a, b, .. } => {
-                a.update(f);
-                b.update(f);
-            }
-            _ => {}
+        if let Node::Split { a, b, .. } = self {
+            a.update(f);
+            b.update(f);
         }
 
         f(self);
diff --git a/native/src/widget/pane_grid/state.rs b/native/src/widget/pane_grid/state.rs
index 6a282d24..4e90f645 100644
--- a/native/src/widget/pane_grid/state.rs
+++ b/native/src/widget/pane_grid/state.rs
@@ -66,6 +66,11 @@ impl<T> State<T> {
         self.panes.len()
     }
 
+    /// Returns `true` if the amount of panes in the [`State`] is 0.
+    pub fn is_empty(&self) -> bool {
+        self.len() == 0
+    }
+
     /// Returns the internal state of the given [`Pane`], if it exists.
     pub fn get(&self, pane: &Pane) -> Option<&T> {
         self.panes.get(pane)
diff --git a/native/src/widget/pick_list.rs b/native/src/widget/pick_list.rs
index c6cfcc01..e735151e 100644
--- a/native/src/widget/pick_list.rs
+++ b/native/src/widget/pick_list.rs
@@ -160,7 +160,7 @@ where
 
     let limits = limits.width(width).height(Length::Shrink).pad(padding);
 
-    let text_size = text_size.unwrap_or(renderer.default_size());
+    let text_size = text_size.unwrap_or_else(|| renderer.default_size());
 
     let max_width = match width {
         Length::Shrink => {
@@ -407,10 +407,9 @@ pub fn draw<T, Renderer>(
 
     let label = selected.map(ToString::to_string);
 
-    if let Some(label) =
-        label.as_ref().map(String::as_str).or_else(|| placeholder)
-    {
-        let text_size = f32::from(text_size.unwrap_or(renderer.default_size()));
+    if let Some(label) = label.as_deref().or(placeholder) {
+        let text_size =
+            f32::from(text_size.unwrap_or_else(|| renderer.default_size()));
 
         renderer.fill_text(Text {
             content: label,
@@ -460,7 +459,7 @@ where
             self.padding,
             self.text_size,
             &self.font,
-            self.placeholder.as_ref().map(String::as_str),
+            self.placeholder.as_deref(),
             &self.options,
         )
     }
@@ -513,7 +512,7 @@ where
             self.padding,
             self.text_size,
             &self.font,
-            self.placeholder.as_ref().map(String::as_str),
+            self.placeholder.as_deref(),
             self.selected.as_ref(),
             self.style,
         )
diff --git a/native/src/widget/radio.rs b/native/src/widget/radio.rs
index ba45a0f4..647e3c5a 100644
--- a/native/src/widget/radio.rs
+++ b/native/src/widget/radio.rs
@@ -168,11 +168,9 @@ where
                     .width(Length::Units(self.size))
                     .height(Length::Units(self.size)),
             )
-            .push(
-                Text::new(&self.label)
-                    .width(self.width)
-                    .size(self.text_size.unwrap_or(renderer.default_size())),
-            )
+            .push(Text::new(&self.label).width(self.width).size(
+                self.text_size.unwrap_or_else(|| renderer.default_size()),
+            ))
             .layout(renderer, limits)
     }
 
diff --git a/native/src/widget/rule.rs b/native/src/widget/rule.rs
index 26285df4..f0fda8a9 100644
--- a/native/src/widget/rule.rs
+++ b/native/src/widget/rule.rs
@@ -36,7 +36,7 @@ where
     /// Creates a vertical [`Rule`] with the given width.
     pub fn vertical(width: u16) -> Self {
         Rule {
-            width: Length::from(Length::Units(width)),
+            width: Length::Units(width),
             height: Length::Fill,
             is_horizontal: false,
             style: Default::default(),
diff --git a/native/src/widget/slider.rs b/native/src/widget/slider.rs
index bda31327..c75c1e99 100644
--- a/native/src/widget/slider.rs
+++ b/native/src/widget/slider.rs
@@ -303,7 +303,7 @@ pub fn draw<T, R>(
         HandleShape::Rectangle {
             width,
             border_radius,
-        } => (f32::from(width), f32::from(bounds.height), border_radius),
+        } => (f32::from(width), bounds.height, border_radius),
     };
 
     let value = value.into() as f32;
@@ -447,7 +447,7 @@ where
         _viewport: &Rectangle,
         _renderer: &Renderer,
     ) -> mouse::Interaction {
-        mouse_interaction(layout, cursor_position, &self.state)
+        mouse_interaction(layout, cursor_position, self.state)
     }
 }
 
diff --git a/native/src/widget/text.rs b/native/src/widget/text.rs
index 242247b0..8d173b8a 100644
--- a/native/src/widget/text.rs
+++ b/native/src/widget/text.rs
@@ -131,7 +131,7 @@ where
     ) -> layout::Node {
         let limits = limits.width(self.width).height(self.height);
 
-        let size = self.size.unwrap_or(renderer.default_size());
+        let size = self.size.unwrap_or_else(|| renderer.default_size());
 
         let bounds = limits.max();
 
@@ -205,7 +205,7 @@ pub fn draw<Renderer>(
 
     renderer.fill_text(crate::text::Text {
         content,
-        size: f32::from(size.unwrap_or(renderer.default_size())),
+        size: f32::from(size.unwrap_or_else(|| renderer.default_size())),
         bounds: Rectangle { x, y, ..bounds },
         color: appearance.color.unwrap_or(style.text_color),
         font,
diff --git a/native/src/widget/text_input.rs b/native/src/widget/text_input.rs
index d345cec3..835b2b4d 100644
--- a/native/src/widget/text_input.rs
+++ b/native/src/widget/text_input.rs
@@ -198,7 +198,7 @@ pub fn layout<Renderer>(
 where
     Renderer: text::Renderer,
 {
-    let text_size = size.unwrap_or(renderer.default_size());
+    let text_size = size.unwrap_or_else(|| renderer.default_size());
 
     let limits = limits
         .pad(padding)
@@ -498,7 +498,7 @@ where
                                 None => {
                                     let content: String = clipboard
                                         .read()
-                                        .unwrap_or(String::new())
+                                        .unwrap_or_default()
                                         .chars()
                                         .filter(|c| !c.is_control())
                                         .collect();
@@ -597,7 +597,7 @@ pub fn draw<Renderer>(
     Renderer::Theme: StyleSheet,
 {
     let secure_value = is_secure.then(|| value.secure());
-    let value = secure_value.as_ref().unwrap_or(&value);
+    let value = secure_value.as_ref().unwrap_or(value);
 
     let bounds = layout.bounds();
     let text_bounds = layout.children().next().unwrap().bounds();
@@ -623,16 +623,16 @@ pub fn draw<Renderer>(
     );
 
     let text = value.to_string();
-    let size = size.unwrap_or(renderer.default_size());
+    let size = size.unwrap_or_else(|| renderer.default_size());
 
     let (cursor, offset) = if state.is_focused() {
-        match state.cursor.state(&value) {
+        match state.cursor.state(value) {
             cursor::State::Index(position) => {
                 let (text_value_width, offset) =
                     measure_cursor_and_scroll_offset(
                         renderer,
                         text_bounds,
-                        &value,
+                        value,
                         size,
                         position,
                         font.clone(),
@@ -664,7 +664,7 @@ pub fn draw<Renderer>(
                     measure_cursor_and_scroll_offset(
                         renderer,
                         text_bounds,
-                        &value,
+                        value,
                         size,
                         left,
                         font.clone(),
@@ -674,7 +674,7 @@ pub fn draw<Renderer>(
                     measure_cursor_and_scroll_offset(
                         renderer,
                         text_bounds,
-                        &value,
+                        value,
                         size,
                         right,
                         font.clone(),
@@ -998,16 +998,16 @@ fn find_cursor_position<Renderer>(
 where
     Renderer: text::Renderer,
 {
-    let size = size.unwrap_or(renderer.default_size());
+    let size = size.unwrap_or_else(|| renderer.default_size());
 
     let offset =
-        offset(renderer, text_bounds, font.clone(), size, &value, &state);
+        offset(renderer, text_bounds, font.clone(), size, value, state);
 
     renderer
         .hit_test(
             &value.to_string(),
             size.into(),
-            font.clone(),
+            font,
             Size::INFINITY,
             Point::new(x + offset, text_bounds.height / 2.0),
             true,
diff --git a/native/src/widget/text_input/editor.rs b/native/src/widget/text_input/editor.rs
index bac530e1..d53fa8d9 100644
--- a/native/src/widget/text_input/editor.rs
+++ b/native/src/widget/text_input/editor.rs
@@ -15,12 +15,9 @@ impl<'a> Editor<'a> {
     }
 
     pub fn insert(&mut self, character: char) {
-        match self.cursor.selection(self.value) {
-            Some((left, right)) => {
-                self.cursor.move_left(self.value);
-                self.value.remove_many(left, right);
-            }
-            _ => {}
+        if let Some((left, right)) = self.cursor.selection(self.value) {
+            self.cursor.move_left(self.value);
+            self.value.remove_many(left, right);
         }
 
         self.value.insert(self.cursor.end(self.value), character);
@@ -29,13 +26,9 @@ impl<'a> Editor<'a> {
 
     pub fn paste(&mut self, content: Value) {
         let length = content.len();
-
-        match self.cursor.selection(self.value) {
-            Some((left, right)) => {
-                self.cursor.move_left(self.value);
-                self.value.remove_many(left, right);
-            }
-            _ => {}
+        if let Some((left, right)) = self.cursor.selection(self.value) {
+            self.cursor.move_left(self.value);
+            self.value.remove_many(left, right);
         }
 
         self.value.insert_many(self.cursor.end(self.value), content);
diff --git a/native/src/widget/text_input/value.rs b/native/src/widget/text_input/value.rs
index 2034cca4..cf4da562 100644
--- a/native/src/widget/text_input/value.rs
+++ b/native/src/widget/text_input/value.rs
@@ -37,7 +37,7 @@ impl Value {
         let previous_string =
             &self.graphemes[..index.min(self.graphemes.len())].concat();
 
-        UnicodeSegmentation::split_word_bound_indices(&previous_string as &str)
+        UnicodeSegmentation::split_word_bound_indices(previous_string as &str)
             .filter(|(_, word)| !word.trim_start().is_empty())
             .next_back()
             .map(|(i, previous_word)| {
@@ -58,9 +58,8 @@ impl Value {
     pub fn next_end_of_word(&self, index: usize) -> usize {
         let next_string = &self.graphemes[index..].concat();
 
-        UnicodeSegmentation::split_word_bound_indices(&next_string as &str)
-            .filter(|(_, word)| !word.trim_start().is_empty())
-            .next()
+        UnicodeSegmentation::split_word_bound_indices(next_string as &str)
+            .find(|(_, word)| !word.trim_start().is_empty())
             .map(|(i, next_word)| {
                 index
                     + UnicodeSegmentation::graphemes(next_word, true).count()
diff --git a/native/src/widget/toggler.rs b/native/src/widget/toggler.rs
index 0936c271..3deaf287 100644
--- a/native/src/widget/toggler.rs
+++ b/native/src/widget/toggler.rs
@@ -162,7 +162,10 @@ where
                     .horizontal_alignment(self.text_alignment)
                     .font(self.font.clone())
                     .width(self.width)
-                    .size(self.text_size.unwrap_or(renderer.default_size())),
+                    .size(
+                        self.text_size
+                            .unwrap_or_else(|| renderer.default_size()),
+                    ),
             );
         }
 
@@ -239,7 +242,7 @@ where
                 renderer,
                 style,
                 label_layout,
-                &label,
+                label,
                 self.text_size,
                 self.font.clone(),
                 Default::default(),
diff --git a/pure/src/lib.rs b/pure/src/lib.rs
index 95aa3098..49b23e1b 100644
--- a/pure/src/lib.rs
+++ b/pure/src/lib.rs
@@ -146,7 +146,7 @@ where
         content: impl Into<Element<'a, Message, Renderer>>,
     ) -> Self {
         let element = content.into();
-        let _ = state.diff(&element);
+        state.diff(&element);
 
         Self { state, element }
     }
diff --git a/pure/src/widget/pick_list.rs b/pure/src/widget/pick_list.rs
index 2c465932..bba5391a 100644
--- a/pure/src/widget/pick_list.rs
+++ b/pure/src/widget/pick_list.rs
@@ -143,7 +143,7 @@ where
             self.padding,
             self.text_size,
             &self.font,
-            self.placeholder.as_ref().map(String::as_str),
+            self.placeholder.as_deref(),
             &self.options,
         )
     }
@@ -199,7 +199,7 @@ where
             self.padding,
             self.text_size,
             &self.font,
-            self.placeholder.as_ref().map(String::as_str),
+            self.placeholder.as_deref(),
             self.selected.as_ref(),
             self.style,
         )
diff --git a/wgpu/src/backend.rs b/wgpu/src/backend.rs
index 05b4af9b..b0aa13fe 100644
--- a/wgpu/src/backend.rs
+++ b/wgpu/src/backend.rs
@@ -93,7 +93,7 @@ impl Backend {
                 &layer,
                 staging_belt,
                 encoder,
-                &frame,
+                frame,
                 target_size.width,
                 target_size.height,
             );
diff --git a/wgpu/src/image.rs b/wgpu/src/image.rs
index 750ad62a..d964aed7 100644
--- a/wgpu/src/image.rs
+++ b/wgpu/src/image.rs
@@ -236,7 +236,7 @@ impl Pipeline {
             entries: &[wgpu::BindGroupEntry {
                 binding: 0,
                 resource: wgpu::BindingResource::TextureView(
-                    &texture_atlas.view(),
+                    texture_atlas.view(),
                 ),
             }],
         });
@@ -264,7 +264,7 @@ impl Pipeline {
     #[cfg(feature = "image_rs")]
     pub fn dimensions(&self, handle: &image::Handle) -> (u32, u32) {
         let mut cache = self.raster_cache.borrow_mut();
-        let memory = cache.load(&handle);
+        let memory = cache.load(handle);
 
         memory.dimensions()
     }
@@ -272,7 +272,7 @@ impl Pipeline {
     #[cfg(feature = "svg")]
     pub fn viewport_dimensions(&self, handle: &svg::Handle) -> (u32, u32) {
         let mut cache = self.vector_cache.borrow_mut();
-        let svg = cache.load(&handle);
+        let svg = cache.load(handle);
 
         svg.viewport_dimensions()
     }
@@ -358,7 +358,7 @@ impl Pipeline {
                     entries: &[wgpu::BindGroupEntry {
                         binding: 0,
                         resource: wgpu::BindingResource::TextureView(
-                            &self.texture_atlas.view(),
+                            self.texture_atlas.view(),
                         ),
                     }],
                 });
diff --git a/wgpu/src/image/atlas.rs b/wgpu/src/image/atlas.rs
index c1347e55..a5bfd9c0 100644
--- a/wgpu/src/image/atlas.rs
+++ b/wgpu/src/image/atlas.rs
@@ -118,7 +118,7 @@ impl Atlas {
                     height,
                     padding,
                     0,
-                    &allocation,
+                    allocation,
                     encoder,
                 );
             }
diff --git a/wgpu/src/image/atlas/layer.rs b/wgpu/src/image/atlas/layer.rs
index b1084ed9..cf089601 100644
--- a/wgpu/src/image/atlas/layer.rs
+++ b/wgpu/src/image/atlas/layer.rs
@@ -9,9 +9,6 @@ pub enum Layer {
 
 impl Layer {
     pub fn is_empty(&self) -> bool {
-        match self {
-            Layer::Empty => true,
-            _ => false,
-        }
+        matches!(self, Layer::Empty)
     }
 }
diff --git a/wgpu/src/image/raster.rs b/wgpu/src/image/raster.rs
index ec5e911f..bd6c1f45 100644
--- a/wgpu/src/image/raster.rs
+++ b/wgpu/src/image/raster.rs
@@ -59,7 +59,7 @@ impl Cache {
                 }
             }
             image::Data::Bytes(bytes) => {
-                if let Ok(image) = image_rs::load_from_memory(&bytes) {
+                if let Ok(image) = image_rs::load_from_memory(bytes) {
                     let operation =
                         Operation::from_exif(&mut std::io::Cursor::new(bytes))
                             .ok()
diff --git a/wgpu/src/image/vector.rs b/wgpu/src/image/vector.rs
index 4c830913..b08a0aa2 100644
--- a/wgpu/src/image/vector.rs
+++ b/wgpu/src/image/vector.rs
@@ -60,7 +60,7 @@ impl Cache {
             }
             svg::Data::Bytes(bytes) => {
                 match usvg::Tree::from_data(
-                    &bytes,
+                    bytes,
                     &usvg::Options::default().to_ref(),
                 ) {
                     Ok(tree) => Svg::Loaded(tree),
@@ -112,7 +112,7 @@ impl Cache {
                 // It would be cool to be able to smooth resize the `svg` example.
                 let mut img = tiny_skia::Pixmap::new(width, height)?;
 
-                let _ = resvg::render(
+                resvg::render(
                     tree,
                     if width > height {
                         usvg::FitTo::Width(width)
diff --git a/wgpu/src/text.rs b/wgpu/src/text.rs
index 45f1f2de..e17b84c1 100644
--- a/wgpu/src/text.rs
+++ b/wgpu/src/text.rs
@@ -188,7 +188,8 @@ impl Pipeline {
                 }
                 b_count += utf8_len;
             }
-            return byte_index;
+
+            byte_index
         };
 
         if !nearest_only {
diff --git a/wgpu/src/triangle.rs b/wgpu/src/triangle.rs
index 40e2f855..fd06dddf 100644
--- a/wgpu/src/triangle.rs
+++ b/wgpu/src/triangle.rs
@@ -173,9 +173,7 @@ impl Pipeline {
                 },
                 depth_stencil: None,
                 multisample: wgpu::MultisampleState {
-                    count: u32::from(
-                        antialiasing.map(|a| a.sample_count()).unwrap_or(1),
-                    ),
+                    count: antialiasing.map(|a| a.sample_count()).unwrap_or(1),
                     mask: !0,
                     alpha_to_coverage_enabled: false,
                 },
@@ -272,47 +270,43 @@ impl Pipeline {
             let vertices = bytemuck::cast_slice(&mesh.buffers.vertices);
             let indices = bytemuck::cast_slice(&mesh.buffers.indices);
 
-            match (
+            if let (Some(vertices_size), Some(indices_size)) = (
                 wgpu::BufferSize::new(vertices.len() as u64),
                 wgpu::BufferSize::new(indices.len() as u64),
             ) {
-                (Some(vertices_size), Some(indices_size)) => {
-                    {
-                        let mut vertex_buffer = staging_belt.write_buffer(
-                            encoder,
-                            &self.vertex_buffer.raw,
-                            (std::mem::size_of::<Vertex2D>() * last_vertex)
-                                as u64,
-                            vertices_size,
-                            device,
-                        );
-
-                        vertex_buffer.copy_from_slice(vertices);
-                    }
-
-                    {
-                        let mut index_buffer = staging_belt.write_buffer(
-                            encoder,
-                            &self.index_buffer.raw,
-                            (std::mem::size_of::<u32>() * last_index) as u64,
-                            indices_size,
-                            device,
-                        );
-
-                        index_buffer.copy_from_slice(indices);
-                    }
-
-                    uniforms.push(transform);
-                    offsets.push((
-                        last_vertex as u64,
-                        last_index as u64,
-                        mesh.buffers.indices.len(),
-                    ));
-
-                    last_vertex += mesh.buffers.vertices.len();
-                    last_index += mesh.buffers.indices.len();
+                {
+                    let mut vertex_buffer = staging_belt.write_buffer(
+                        encoder,
+                        &self.vertex_buffer.raw,
+                        (std::mem::size_of::<Vertex2D>() * last_vertex) as u64,
+                        vertices_size,
+                        device,
+                    );
+
+                    vertex_buffer.copy_from_slice(vertices);
+                }
+
+                {
+                    let mut index_buffer = staging_belt.write_buffer(
+                        encoder,
+                        &self.index_buffer.raw,
+                        (std::mem::size_of::<u32>() * last_index) as u64,
+                        indices_size,
+                        device,
+                    );
+
+                    index_buffer.copy_from_slice(indices);
                 }
-                _ => {}
+
+                uniforms.push(transform);
+                offsets.push((
+                    last_vertex as u64,
+                    last_index as u64,
+                    mesh.buffers.indices.len(),
+                ));
+
+                last_vertex += mesh.buffers.vertices.len();
+                last_index += mesh.buffers.indices.len();
             }
         }
 
diff --git a/wgpu/src/triangle/msaa.rs b/wgpu/src/triangle/msaa.rs
index 7edeeb94..a3016ff8 100644
--- a/wgpu/src/triangle/msaa.rs
+++ b/wgpu/src/triangle/msaa.rs
@@ -134,7 +134,7 @@ impl Blit {
         match &mut self.targets {
             None => {
                 self.targets = Some(Targets::new(
-                    &device,
+                    device,
                     self.format,
                     &self.texture_layout,
                     self.sample_count,
@@ -145,7 +145,7 @@ impl Blit {
             Some(targets) => {
                 if targets.width != width || targets.height != height {
                     self.targets = Some(Targets::new(
-                        &device,
+                        device,
                         self.format,
                         &self.texture_layout,
                         self.sample_count,
diff --git a/wgpu/src/window/compositor.rs b/wgpu/src/window/compositor.rs
index fa1f441a..a36d2a87 100644
--- a/wgpu/src/window/compositor.rs
+++ b/wgpu/src/window/compositor.rs
@@ -225,7 +225,7 @@ impl<Theme> iced_graphics::window::Compositor for Compositor<Theme> {
 
                 renderer.with_primitives(|backend, primitives| {
                     backend.present(
-                        &mut self.device,
+                        &self.device,
                         &mut self.staging_belt,
                         &mut encoder,
                         view,
diff --git a/winit/src/application.rs b/winit/src/application.rs
index 9c7dd74e..99402cf5 100644
--- a/winit/src/application.rs
+++ b/winit/src/application.rs
@@ -647,7 +647,7 @@ mod platform {
     {
         use winit::platform::run_return::EventLoopExtRunReturn;
 
-        let _ = event_loop.run_return(event_handler);
+        event_loop.run_return(event_handler);
 
         Ok(())
     }
diff --git a/winit/src/conversion.rs b/winit/src/conversion.rs
index 8e6c0b37..74f6f7a0 100644
--- a/winit/src/conversion.rs
+++ b/winit/src/conversion.rs
@@ -485,10 +485,10 @@ pub fn key_code(
 
 // As defined in: http://www.unicode.org/faq/private_use.html
 pub(crate) fn is_private_use_character(c: char) -> bool {
-    match c {
+    matches!(
+        c,
         '\u{E000}'..='\u{F8FF}'
         | '\u{F0000}'..='\u{FFFFD}'
-        | '\u{100000}'..='\u{10FFFD}' => true,
-        _ => false,
-    }
+        | '\u{100000}'..='\u{10FFFD}'
+    )
 }
diff --git a/winit/src/system.rs b/winit/src/system.rs
index 0ed61dc9..0303707e 100644
--- a/winit/src/system.rs
+++ b/winit/src/system.rs
@@ -24,7 +24,7 @@ pub(crate) fn information(
 
     let memory_used = sysinfo::get_current_pid()
         .and_then(|pid| system.process(pid).ok_or("Process not found"))
-        .and_then(|process| Ok(process.memory()))
+        .map(|process| process.memory())
         .ok();
 
     Information {