Enable and fix some more clippy lints (#7426)

One can never have too many lints

Cargo.toml

@@ -159,8 +159,8 @@ disallowed_types = "warn"                   # See clippy.toml
 doc_link_with_quotes = "warn"
 doc_markdown = "warn"
 empty_enum = "warn"
-empty_line_after_outer_attr = "warn"
 empty_enum_variants_with_brackets = "warn"
+empty_line_after_outer_attr = "warn"
 enum_glob_use = "warn"
 equatable_if_let = "warn"
 exit = "warn"
@@ -180,6 +180,7 @@ if_let_mutex = "warn"
 implicit_clone = "warn"
 implied_bounds_in_impls = "warn"
 imprecise_flops = "warn"
+inconsistent_struct_constructor = "warn"
 index_refutable_slice = "warn"
 inefficient_to_string = "warn"
 infinite_loop = "warn"
@@ -295,8 +296,21 @@ verbose_file_reads = "warn"
 wildcard_dependencies = "warn"
 zero_sized_map_values = "warn"
 
+# Enable these when we update MSRV:
+# doc_comment_double_space_linebreaks = "warn"
+# elidable_lifetime_names = "warn"
+# ignore_without_reason = "warn"
+# manual_midpoint = "warn"
+# non_std_lazy_statics = "warn"
+# precedence_bits = "warn"
+# return_and_then = "warn"
+# single_option_map = "warn"
+# unnecessary_debug_formatting = "warn"
+# unnecessary_semicolon = "warn"
+
 
 # TODO(emilk): maybe enable more of these lints?
+comparison_chain = "allow"
 should_panic_without_expect = "allow"
 too_many_lines = "allow"
 unwrap_used = "allow"                 # TODO(emilk): We really wanna warn on this one

crates/ecolor/src/hsva.rs

@@ -234,7 +234,7 @@ pub fn rgb_from_hsv((h, s, v): (f32, f32, f32)) -> [f32; 3] {
 }
 
 #[test]
-#[ignore] // a bit expensive
+#[ignore = "too expensive"]
 fn test_hsv_roundtrip() {
     for r in 0..=255 {
         for g in 0..=255 {

crates/eframe/src/epi.rs

@@ -893,16 +893,15 @@ pub trait Storage {
 #[cfg(feature = "ron")]
 pub fn get_value<T: serde::de::DeserializeOwned>(storage: &dyn Storage, key: &str) -> Option<T> {
     profiling::function_scope!(key);
-    storage
-        .get_string(key)
-        .and_then(|value| match ron::from_str(&value) {
-            Ok(value) => Some(value),
-            Err(err) => {
-                // This happens on when we break the format, e.g. when updating egui.
-                log::debug!("Failed to decode RON: {err}");
-                None
-            }
-        })
+    let value = storage.get_string(key)?;
+    match ron::from_str(&value) {
+        Ok(value) => Some(value),
+        Err(err) => {
+            // This happens on when we break the format, e.g. when updating egui.
+            log::debug!("Failed to decode RON: {err}");
+            None
+        }
+    }
 }
 
 /// Serialize the given value as [RON](https://github.com/ron-rs/ron) and store with the given key.

crates/eframe/src/native/glow_integration.rs

@@ -336,10 +336,10 @@ impl<'app> GlowWinitApp<'app> {
         }
 
         Ok(self.running.insert(GlowWinitRunning {
-            glutin,
-            painter,
             integration,
             app,
+            glutin,
+            painter,
         }))
     }
 }
@@ -362,8 +362,12 @@ impl WinitApp for GlowWinitApp<'_> {
 
     fn window_id_from_viewport_id(&self, id: ViewportId) -> Option<WindowId> {
         self.running
-            .as_ref()
-            .and_then(|r| r.glutin.borrow().window_from_viewport.get(&id).copied())
+            .as_ref()?
+            .glutin
+            .borrow()
+            .window_from_viewport
+            .get(&id)
+            .copied()
     }
 
     fn save(&mut self) {

crates/eframe/src/native/run.rs

@@ -145,7 +145,7 @@ impl<T: WinitApp> WinitAppWrapper<T> {
             log::error!("Exiting because of error: {err}");
             exit = true;
             self.return_result = Err(err);
-        };
+        }
 
         if save {
             log::debug!("Received an EventResult::Save - saving app state");
@@ -176,7 +176,7 @@ impl<T: WinitApp> WinitAppWrapper<T> {
             .retain(|window_id, repaint_time| {
                 if now < *repaint_time {
                     return true; // not yet ready
-                };
+                }
 
                 event_loop.set_control_flow(ControlFlow::Poll);
 
@@ -192,7 +192,7 @@ impl<T: WinitApp> WinitAppWrapper<T> {
         let next_repaint_time = self.windows_next_repaint_times.values().min().copied();
         if let Some(next_repaint_time) = next_repaint_time {
             event_loop.set_control_flow(ControlFlow::WaitUntil(next_repaint_time));
-        };
+        }
     }
 }
 

crates/eframe/src/native/wgpu_integration.rs

@@ -333,10 +333,8 @@ impl WinitApp for WgpuWinitApp<'_> {
             .as_ref()
             .and_then(|r| {
                 let shared = r.shared.borrow();
-                shared
-                    .viewport_from_window
-                    .get(&window_id)
-                    .and_then(|id| shared.viewports.get(id).map(|v| v.window.clone()))
+                let id = shared.viewport_from_window.get(&window_id)?;
+                shared.viewports.get(id).map(|v| v.window.clone())
             })
             .flatten()
     }
@@ -821,17 +819,16 @@ impl WgpuWinitRunning<'_> {
             }
 
             _ => {}
-        };
+        }
 
         let event_response = viewport_id
             .and_then(|viewport_id| {
-                shared.viewports.get_mut(&viewport_id).and_then(|viewport| {
-                    Some(integration.on_window_event(
-                        viewport.window.as_deref()?,
-                        viewport.egui_winit.as_mut()?,
-                        event,
-                    ))
-                })
+                let viewport = shared.viewports.get_mut(&viewport_id)?;
+                Some(integration.on_window_event(
+                    viewport.window.as_deref()?,
+                    viewport.egui_winit.as_mut()?,
+                    event,
+                ))
             })
             .unwrap_or_default();
 

crates/egui-wgpu/src/renderer.rs

@@ -873,7 +873,7 @@ impl Renderer {
                             callbacks.push(c.0.as_ref());
                         } else {
                             log::warn!("Unknown paint callback: expected `egui_wgpu::Callback`");
-                        };
+                        }
                         acc
                     }
                 }

crates/egui-wgpu/src/winit.rs

@@ -328,7 +328,7 @@ impl Painter {
                     })
                     .create_view(&wgpu::TextureViewDescriptor::default()),
             );
-        };
+        }
     }
 
     pub fn on_window_resized(

crates/egui-winit/src/lib.rs

@@ -372,7 +372,7 @@ impl State {
                     winit::event::Ime::Disabled | winit::event::Ime::Preedit(_, None) => {
                         self.ime_event_disable();
                     }
-                };
+                }
 
                 EventResponse {
                     repaint: true,
@@ -583,7 +583,7 @@ impl State {
                             pos,
                             force: None,
                         });
-                    };
+                    }
                 }
             }
         }

crates/egui/src/containers/popup.rs

@@ -458,7 +458,7 @@ impl<'a> Popup<'a> {
 
     /// Get the expected size of the popup.
     pub fn get_expected_size(&self) -> Option<Vec2> {
-        AreaState::load(&self.ctx, self.id).and_then(|area| area.size)
+        AreaState::load(&self.ctx, self.id)?.size
     }
 
     /// Calculate the best alignment for the popup, based on the last size and screen rect.

crates/egui/src/containers/scroll_area.rs

@@ -1059,7 +1059,7 @@ impl Prepared {
 
                     delta += delta_update;
                     animation = animation_update;
-                };
+                }
 
                 if delta != 0.0 {
                     let target_offset = state.offset[d] + delta;
@@ -1090,7 +1090,7 @@ impl Prepared {
             for d in 0..2 {
                 if saved_scroll_target[d].is_some() {
                     state.scroll_target[d] = saved_scroll_target[d].clone();
-                };
+                }
             }
         });
 

crates/egui/src/containers/window.rs

@@ -616,7 +616,7 @@ impl Window<'_> {
                             *where_to_put_header_background,
                             RectShape::filled(title_bar.inner_rect, round, header_color),
                         );
-                    };
+                    }
 
                     if false {
                         ctx.debug_painter().debug_rect(

crates/egui/src/context.rs

@@ -1259,7 +1259,7 @@ impl Context {
                             viewport.this_pass.scroll_delta.0 += DISTANCE * Vec2::RIGHT;
                         }
                         _ => return false,
-                    };
+                    }
                     true
                 });
         });

crates/egui/src/data/output.rs

@@ -729,7 +729,7 @@ impl WidgetInfo {
                 description = format!("{state} {description}");
             } else {
                 description += if *selected { "selected" } else { "" };
-            };
+            }
         }
 
         if let Some(label) = label {

crates/egui/src/interaction.rs

@@ -293,7 +293,7 @@ pub(crate) fn interact(
         drag_started,
         dragged,
         drag_stopped,
-        contains_pointer,
         hovered,
+        contains_pointer,
     }
 }

crates/egui/src/layout.rs

@@ -753,7 +753,7 @@ impl Layout {
                             pos2(frame_rect.max.x, f32::NAN),
                         );
                     }
-                };
+                }
             }
         } else {
             // Make sure we also expand where we consider adding things (the cursor):
@@ -779,7 +779,7 @@ impl Layout {
             Direction::BottomUp => {
                 cursor.max.y = widget_rect.min.y - item_spacing.y;
             }
-        };
+        }
     }
 
     /// Move to the next row in a wrapping layout.

crates/egui/src/memory/mod.rs

@@ -802,15 +802,12 @@ impl Memory {
 
     /// Top-most layer at the given position.
     pub fn layer_id_at(&self, pos: Pos2) -> Option<LayerId> {
-        self.areas()
-            .layer_id_at(pos, &self.to_global)
-            .and_then(|layer_id| {
-                if self.is_above_modal_layer(layer_id) {
-                    Some(layer_id)
-                } else {
-                    self.top_modal_layer()
-                }
-            })
+        let layer_id = self.areas().layer_id_at(pos, &self.to_global)?;
+        if self.is_above_modal_layer(layer_id) {
+            Some(layer_id)
+        } else {
+            self.top_modal_layer()
+        }
     }
 
     /// The currently set transform of a layer.
@@ -855,7 +852,7 @@ impl Memory {
 
     /// Which widget has keyboard focus?
     pub fn focused(&self) -> Option<Id> {
-        self.focus().and_then(|f| f.focused())
+        self.focus()?.focused()
     }
 
     /// Set an event filter for a widget.
@@ -1066,9 +1063,8 @@ impl Memory {
     /// Get the position for this popup.
     #[deprecated = "Use Popup::position_of_id instead"]
     pub fn popup_position(&self, id: Id) -> Option<Pos2> {
-        self.popups
-            .get(&self.viewport_id)
-            .and_then(|state| if state.id == id { state.pos } else { None })
+        let state = self.popups.get(&self.viewport_id)?;
+        if state.id == id { state.pos } else { None }
     }
 
     /// Close any currently open popup.

crates/egui/src/menu.rs

@@ -766,9 +766,8 @@ impl MenuState {
     }
 
     fn submenu(&self, id: Id) -> Option<&Arc<RwLock<Self>>> {
-        self.sub_menu
-            .as_ref()
-            .and_then(|(k, sub)| if id == *k { Some(sub) } else { None })
+        let (k, sub) = self.sub_menu.as_ref()?;
+        if id == *k { Some(sub) } else { None }
     }
 
     /// Open submenu at position, if not already open.

crates/egui/src/style.rs

@@ -2136,7 +2136,7 @@ impl Visuals {
                     ui.color_edit_button_srgba(color);
                 } else {
                     *color = None;
-                };
+                }
             });
 
             ui.end_row();

crates/egui/src/widgets/button.rs

@@ -325,7 +325,7 @@ impl<'a> Button<'a> {
                     .fill(fill)
                     .stroke(stroke)
                     .corner_radius(corner_radius.unwrap_or(visuals.corner_radius));
-            };
+            }
 
             prepared.paint(ui)
         } else {

crates/egui/src/widgets/label.rs

@@ -250,7 +250,7 @@ impl Label {
             } else {
                 layout_job.halign = self.halign.unwrap_or(ui.layout().horizontal_placement());
                 layout_job.justify = ui.layout().horizontal_justify();
-            };
+            }
 
             let galley = ui.fonts(|fonts| fonts.layout_job(layout_job));
             let (rect, mut response) = ui.allocate_exact_size(galley.size(), sense);

crates/egui/src/widgets/slider.rs

@@ -806,7 +806,7 @@ impl Slider<'_> {
                     SliderOrientation::Vertical => {
                         trailing_rail_rect.min.y = center.y - corner_radius.se as f32;
                     }
-                };
+                }
 
                 ui.painter().rect_filled(
                     trailing_rail_rect,
@@ -936,7 +936,7 @@ impl Slider<'_> {
 
             if let Some(fmt) = &self.custom_formatter {
                 dv = dv.custom_formatter(fmt);
-            };
+            }
             if let Some(parser) = &self.custom_parser {
                 dv = dv.custom_parser(parser);
             }

crates/egui_demo_app/src/apps/fractal_clock.rs

@@ -73,7 +73,7 @@ impl FractalClock {
             ));
         } else {
             ui.label("The fractal_clock clock is not showing the correct time");
-        };
+        }
         ui.label(format!("Painted line count: {}", self.line_count));
 
         ui.checkbox(&mut self.paused, "Paused");

crates/egui_demo_app/src/apps/image_viewer.rs

@@ -61,7 +61,7 @@ impl eframe::App for ImageViewer {
                     ctx.forget_image(&self.current_uri);
                     self.uri_edit_text = self.uri_edit_text.trim().to_owned();
                     self.current_uri = self.uri_edit_text.clone();
-                };
+                }
 
                 #[cfg(not(target_arch = "wasm32"))]
                 if ui.button("file…").clicked() {

crates/egui_demo_app/src/main.rs

@@ -91,5 +91,5 @@ fn start_puffin_server() {
         Err(err) => {
             log::error!("Failed to start puffin server: {err}");
         }
-    };
+    }
 }

crates/egui_demo_lib/src/demo/misc_demo_window.rs

@@ -805,7 +805,7 @@ impl TextRotation {
                 if let egui::epaint::Shape::Text(ts) = &mut t {
                     let new = ts.clone().with_angle_and_anchor(self.angle, self.align);
                     *ts = new;
-                };
+                }
 
                 t
             });
@@ -814,7 +814,7 @@ impl TextRotation {
                 let align_pt =
                     rect.min + start_pos + self.align.pos_in_rect(&ts.galley.rect).to_vec2();
                 painter.circle(align_pt, 2.0, Color32::RED, (0.0, Color32::RED));
-            };
+            }
 
             painter.rect(
                 rect,

crates/egui_demo_lib/src/demo/paint_bezier.rs

@@ -152,7 +152,7 @@ impl PaintBezier {
             _ => {
                 unreachable!();
             }
-        };
+        }
 
         painter.add(PathShape::line(points_in_screen, self.aux_stroke));
         painter.extend(control_point_shapes);

crates/egui_demo_lib/src/easy_mark/easy_mark_editor.rs

@@ -165,7 +165,7 @@ fn shortcuts(ui: &Ui, code: &mut dyn TextBuffer, ccursor_range: &mut CCursorRang
         if ui.input_mut(|i| i.consume_shortcut(&shortcut)) {
             any_change = true;
             toggle_surrounding(code, ccursor_range, surrounding);
-        };
+        }
     }
 
     any_change

crates/egui_demo_lib/src/easy_mark/easy_mark_viewer.rs

@@ -101,7 +101,7 @@ pub fn item_ui(ui: &mut Ui, item: easy_mark::Item<'_>) {
                 Shape::rect_filled(rect, 1.0, code_bg_color),
             );
         }
-    };
+    }
 }
 
 fn rich_text_from_style(text: &str, style: &easy_mark::Style) -> RichText {

crates/egui_extras/src/datepicker/popup.rs

@@ -336,7 +336,7 @@ impl DatePickerPopup<'_> {
                                                         if day.month() != popup_state.month {
                                                             text_color =
                                                                 text_color.linear_multiply(0.5);
-                                                        };
+                                                        }
 
                                                         let button_response = ui.add(
                                                             Button::new(

crates/egui_glow/src/painter.rs

@@ -528,7 +528,7 @@ impl Painter {
 
                 self.upload_texture_srgb(delta.pos, image.size, delta.options, data);
             }
-        };
+        }
     }
 
     fn upload_texture_srgb(

crates/egui_kittest/src/snapshot.rs

@@ -232,7 +232,8 @@ impl Display for SnapshotError {
                 let diff_path = std::path::absolute(diff_path).unwrap_or(diff_path.clone());
                 write!(
                     f,
-                    "'{name}' Image did not match snapshot. Diff: {diff}, {diff_path:?}. {HOW_TO_UPDATE_SCREENSHOTS}"
+                    "'{name}' Image did not match snapshot. Diff: {diff}, {}. {HOW_TO_UPDATE_SCREENSHOTS}",
+                    diff_path.display()
                 )
             }
             Self::OpenSnapshot { path, err } => {
@@ -240,19 +241,25 @@ impl Display for SnapshotError {
                 match err {
                     ImageError::IoError(io) => match io.kind() {
                         ErrorKind::NotFound => {
-                            write!(f, "Missing snapshot: {path:?}. {HOW_TO_UPDATE_SCREENSHOTS}")
+                            write!(
+                                f,
+                                "Missing snapshot: {}. {HOW_TO_UPDATE_SCREENSHOTS}",
+                                path.display()
+                            )
                         }
                         err => {
                             write!(
                                 f,
-                                "Error reading snapshot: {err:?}\nAt: {path:?}. {HOW_TO_UPDATE_SCREENSHOTS}"
+                                "Error reading snapshot: {err:?}\nAt: {}. {HOW_TO_UPDATE_SCREENSHOTS}",
+                                path.display()
                             )
                         }
                     },
                     err => {
                         write!(
                             f,
-                            "Error decoding snapshot: {err:?}\nAt: {path:?}. Make sure git-lfs is setup correctly. Read the instructions here: https://github.com/emilk/egui/blob/main/CONTRIBUTING.md#making-a-pr"
+                            "Error decoding snapshot: {err:?}\nAt: {}. Make sure git-lfs is setup correctly. Read the instructions here: https://github.com/emilk/egui/blob/main/CONTRIBUTING.md#making-a-pr",
+                            path.display()
                         )
                     }
                 }
@@ -269,7 +276,7 @@ impl Display for SnapshotError {
             }
             Self::WriteSnapshot { path, err } => {
                 let path = std::path::absolute(path).unwrap_or(path.clone());
-                write!(f, "Error writing snapshot: {err:?}\nAt: {path:?}")
+                write!(f, "Error writing snapshot: {err:?}\nAt: {}", path.display())
             }
             Self::RenderError { err } => {
                 write!(f, "Error rendering image: {err:?}")
@@ -363,7 +370,7 @@ fn try_image_snapshot_options_impl(
         // No need for an explicit `.new` file:
         std::fs::remove_file(&new_path).ok();
 
-        println!("Updated snapshot: {snapshot_path:?}");
+        println!("Updated snapshot: {}", snapshot_path.display());
 
         Ok(())
     };

crates/egui_kittest/tests/menu.rs

@@ -50,7 +50,7 @@ impl TestMenu {
                                             .clicked()
                                         {
                                             ui.close();
-                                        };
+                                        }
                                     });
                                 });
                         });

crates/egui_kittest/tests/tests.rs

@@ -93,7 +93,7 @@ fn test_scroll_harness() -> Harness<'static, bool> {
                     }
                     if ui.button("Hidden Button").clicked() {
                         *state = true;
-                    };
+                    }
                 });
             },
             false,

crates/emath/src/align.rs

@@ -134,7 +134,7 @@ impl Align {
                 if size == f32::INFINITY {
                     Rangef::new(f32::NEG_INFINITY, f32::INFINITY)
                 } else {
-                    let left = (min + max) / 2.0 - size / 2.0;
+                    let left = f32::midpoint(min, max) - size / 2.0;
                     Rangef::new(left, left + size)
                 }
             }

crates/emath/src/rect.rs

@@ -331,8 +331,8 @@ impl Rect {
     #[inline(always)]
     pub fn center(&self) -> Pos2 {
         Pos2 {
-            x: (self.min.x + self.max.x) / 2.0,
-            y: (self.min.y + self.max.y) / 2.0,
+            x: f32::midpoint(self.min.x, self.max.x),
+            y: f32::midpoint(self.min.y, self.max.y),
         }
     }
 

crates/emath/src/smart_aim.rs

@@ -43,7 +43,7 @@ pub fn best_in_range_f64(min: f64, max: f64) -> f64 {
 
     if min_exponent.floor() != max_exponent.floor() {
         // pick the geometric center of the two:
-        let exponent = (min_exponent + max_exponent) / 2.0;
+        let exponent = f64::midpoint(min_exponent, max_exponent);
         return 10.0_f64.powi(exponent.round() as i32);
     }
 

crates/emath/src/ts_transform.rs

@@ -36,8 +36,8 @@ impl TSTransform {
     /// `(0, 0)`, then translates them.
     pub fn new(translation: Vec2, scaling: f32) -> Self {
         Self {
-            translation,
             scaling,
+            translation,
         }
     }
 

examples/puffin_profiler/src/main.rs

@@ -177,5 +177,5 @@ fn start_puffin_server() {
         Err(err) => {
             log::error!("Failed to start puffin server: {err}");
         }
-    };
+    }
 }

examples/screenshot/src/main.rs

@@ -57,7 +57,7 @@ impl eframe::App for MyApp {
                             ctx.set_theme(egui::Theme::Dark);
                         } else {
                             ctx.set_theme(egui::Theme::Light);
-                        };
+                        }
                         ctx.send_viewport_cmd(
                             egui::ViewportCommand::Screenshot(Default::default()),
                         );

xtask/src/utils.rs

@@ -32,7 +32,7 @@ pub fn ask_to_run(mut cmd: Command, ask: bool, reason: &str) -> Result<(), DynEr
             "" | "y" | "yes" => {}
             "n" | "no" => return Err("Aborting as per your request".into()),
             a => return Err(format!("Invalid answer `{a}`").into()),
-        };
+        }
     } else {
         println!("Running `{cmd:?}` to {reason}.");
     }