Enable the clippy::pedantic lint group (#8429)

Instead of opting in to pedantic lints one by one, enable the whole
group and opt out of the noisy ones.

64% of the pedantic lints were already listed individually. This deletes
90 explicit lint lines, enables 51 pedantic lints we never listed, and
picks up new pedantic lints for free. Each opt-out carries its hit
count, so the cost of turning one back on is visible.

`restriction` and `nursery` stay opt-in per lint.

Stacked on top of #8430, which fixes the one real bug the new lints
found.

* [x] I have followed the instructions in the PR template

---------

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

crates/ecolor/src/hsva.rs

@@ -41,7 +41,6 @@ impl Hsva {
     /// From linear RGBA with premultiplied alpha
     #[inline]
     pub fn from_rgba_premultiplied(r: f32, g: f32, b: f32, a: f32) -> Self {
-        #![expect(clippy::many_single_char_names)]
         if a <= 0.0 {
             if r == 0.0 && b == 0.0 && a == 0.0 {
                 Self::default()
@@ -57,7 +56,6 @@ impl Hsva {
     /// From linear RGBA without premultiplied alpha
     #[inline]
     pub fn from_rgba_unmultiplied(r: f32, g: f32, b: f32, a: f32) -> Self {
-        #![expect(clippy::many_single_char_names)]
         let (h, s, v) = hsv_from_rgb([r, g, b]);
         Self { h, s, v, a }
     }
@@ -189,7 +187,6 @@ impl From<Color32> for Hsva {
 /// All ranges in 0-1, rgb is linear.
 #[inline]
 pub fn hsv_from_rgb([r, g, b]: [f32; 3]) -> (f32, f32, f32) {
-    #![expect(clippy::many_single_char_names)]
     let min = r.min(g.min(b));
     let max = r.max(g.max(b)); // value
 
@@ -213,7 +210,6 @@ pub fn hsv_from_rgb([r, g, b]: [f32; 3]) -> (f32, f32, f32) {
 /// All ranges in 0-1, rgb is linear.
 #[inline]
 pub fn rgb_from_hsv((h, s, v): (f32, f32, f32)) -> [f32; 3] {
-    #![expect(clippy::many_single_char_names)]
     let h = (h.fract() + 1.0).fract(); // wrap
     let s = s.clamp(0.0, 1.0);
 

crates/eframe/src/native/app_icon.rs

@@ -161,16 +161,16 @@ fn set_app_icon_windows(icon_data: &IconData) -> AppIconStatus {
         if icon_big.is_null() {
             log::warn!("Failed to create HICON (for big icon) from embedded png data.");
             return AppIconStatus::NotSetIgnored; // We could try independently with the small icon but what's the point, it would look bad!
-        } else {
-            // SAFETY: Unsafe WinApi function, takes objects previously created with WinAPI, all checked for null prior.
-            unsafe {
-                SendMessageW(
-                    window_handle,
-                    WM_SETICON,
-                    ICON_BIG as usize,
-                    icon_big as isize,
-                );
-            }
+        }
+
+        // SAFETY: Unsafe WinApi function, takes objects previously created with WinAPI, all checked for null prior.
+        unsafe {
+            SendMessageW(
+                window_handle,
+                WM_SETICON,
+                ICON_BIG as usize,
+                icon_big as isize,
+            );
         }
     }
     {
@@ -180,16 +180,16 @@ fn set_app_icon_windows(icon_data: &IconData) -> AppIconStatus {
         if icon_small.is_null() {
             log::warn!("Failed to create HICON (for small icon) from embedded png data.");
             return AppIconStatus::NotSetIgnored;
-        } else {
-            // SAFETY: Unsafe WinApi function, takes objects previously created with WinAPI, all checked for null prior.
-            unsafe {
-                SendMessageW(
-                    window_handle,
-                    WM_SETICON,
-                    ICON_SMALL as usize,
-                    icon_small as isize,
-                );
-            }
+        }
+
+        // SAFETY: Unsafe WinApi function, takes objects previously created with WinAPI, all checked for null prior.
+        unsafe {
+            SendMessageW(
+                window_handle,
+                WM_SETICON,
+                ICON_SMALL as usize,
+                icon_small as isize,
+            );
         }
     }
 

crates/eframe/src/native/file_storage.rs

@@ -67,7 +67,7 @@ fn roaming_appdata() -> Option<PathBuf> {
             &FOLDERID_RoamingAppData,
             KF_FLAG_DONT_VERIFY as u32,
             core::ptr::null_mut(),
-            &mut path_raw,
+            &raw mut path_raw,
         )
     };
 

crates/egui/src/context.rs

@@ -1761,11 +1761,11 @@ impl Context {
                 .get(&id)
                 .map(|v| v.repaint.cumulative_frame_nr)
                 .unwrap_or_else(|| {
-                    if cfg!(debug_assertions) {
-                        panic!("cumulative_frame_nr_for failed to find the viewport {id:?}");
-                    } else {
-                        0
-                    }
+                    debug_assert!(
+                        false,
+                        "cumulative_frame_nr_for failed to find the viewport {id:?}"
+                    );
+                    0
                 })
         })
     }

crates/egui/src/id.rs

@@ -41,6 +41,13 @@ impl<T: core::hash::Hash + core::fmt::Debug> AsId for T {}
 /// This is niche-optimized to that `Option<Id>` is the same size as `Id`.
 #[derive(Clone, Copy, Hash, Eq, PartialEq)]
 #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))]
+#[cfg_attr(
+    feature = "serde",
+    expect(
+        clippy::unsafe_derive_deserialize,
+        reason = "`from_high_entropy_bits` is only `unsafe` about entropy, not memory safety"
+    )
+)]
 pub struct Id(NonZeroU64);
 
 impl nohash_hasher::IsEnabled for Id {}

crates/egui_demo_lib/src/easy_mark/easy_mark_parser.rs

@@ -118,15 +118,15 @@ impl<'a> Parser<'a> {
         {
             let language = &language_start[..newline];
             let code_start = &language_start[newline + 1..];
-            if let Some(end) = code_start.find("\n```") {
+            return if let Some(end) = code_start.find("\n```") {
                 let code = &code_start[..end].trim();
                 self.s = &code_start[end + 4..];
                 self.start_of_line = false;
-                return Some(Item::CodeBlock(language, code));
+                Some(Item::CodeBlock(language, code))
             } else {
                 self.s = "";
-                return Some(Item::CodeBlock(language, code_start));
-            }
+                Some(Item::CodeBlock(language, code_start))
+            };
         }
         None
     }
@@ -138,18 +138,18 @@ impl<'a> Parser<'a> {
             self.start_of_line = false;
             self.style.code = true;
             let rest_of_line = &self.s[..self.s.find('\n').unwrap_or(self.s.len())];
-            if let Some(end) = rest_of_line.find('`') {
+            return if let Some(end) = rest_of_line.find('`') {
                 let item = Item::Text(self.style, &self.s[..end]);
                 self.s = &self.s[end + 1..];
                 self.style.code = false;
-                return Some(item);
+                Some(item)
             } else {
                 let end = rest_of_line.len();
                 let item = Item::Text(self.style, rest_of_line);
                 self.s = &self.s[end..];
                 self.style.code = false;
-                return Some(item);
-            }
+                Some(item)
+            };
         }
         None
     }

crates/egui_extras/src/syntax_highlighting.rs

@@ -210,6 +210,13 @@ impl SyntectTheme {
     derive(serde::Deserialize, serde::Serialize),
     serde(default)
 )]
+#[cfg_attr(
+    all(feature = "serde", not(feature = "syntect")),
+    expect(
+        clippy::unsafe_derive_deserialize,
+        reason = "the `enum_map!` macro expands to `unsafe` code"
+    )
+)]
 pub struct CodeTheme {
     dark_mode: bool,
 

crates/egui_kittest/src/lib.rs

@@ -247,16 +247,16 @@ impl<'a, State> Harness<'a, State> {
     pub fn step(&mut self) {
         let events = core::mem::take(&mut *self.queued_events.lock());
         if events.is_empty() {
-            self._step(false);
+            self.step_impl(false);
         }
         for event in events {
             self.input.events.push(event);
-            self._step(false);
+            self.step_impl(false);
         }
     }
 
     /// Run a single step. This will not process any events.
-    fn _step(&mut self, sizing_pass: bool) {
+    fn step_impl(&mut self, sizing_pass: bool) {
         self.input.predicted_dt = self.step_dt;
 
         let mut output = self.ctx.run_ui(self.input.take(), |ui| {
@@ -297,7 +297,7 @@ impl<'a, State> Harness<'a, State> {
     /// [`Harness::new_ui`] / [`Harness::new_ui_state`] or
     /// [`HarnessBuilder::build_ui`] / [`HarnessBuilder::build_ui_state`].
     pub fn fit_contents(&mut self) {
-        self._step(true);
+        self.step_impl(true);
 
         // Calculate size including all content (main UI + popups + tooltips)
         if let Some(rect) = self.compute_total_rect_with_popups() {
@@ -333,7 +333,7 @@ impl<'a, State> Harness<'a, State> {
         }
     }
 
-    fn _try_run(&mut self, sleep: bool) -> Result<u64, ExceededMaxStepsError> {
+    fn try_run_impl(&mut self, sleep: bool) -> Result<u64, ExceededMaxStepsError> {
         let mut steps = 0;
         loop {
             steps += 1;
@@ -374,7 +374,7 @@ impl<'a, State> Harness<'a, State> {
     /// - [`Harness::run_steps`].
     /// - [`Harness::try_run_realtime`].
     pub fn try_run(&mut self) -> Result<u64, ExceededMaxStepsError> {
-        self._try_run(false)
+        self.try_run_impl(false)
     }
 
     /// Run until
@@ -414,7 +414,7 @@ impl<'a, State> Harness<'a, State> {
     /// - [`Harness::run_steps`].
     /// - [`Harness::try_run`].
     pub fn try_run_realtime(&mut self) -> Result<u64, ExceededMaxStepsError> {
-        self._try_run(true)
+        self.try_run_impl(true)
     }
 
     /// Run a number of steps.

crates/egui_kittest/src/snapshot.rs

@@ -535,31 +535,31 @@ fn try_image_snapshot_options_impl(
         Ok(image) => image.to_rgba8(),
         Err(err) => {
             // No previous snapshot - probably a new test.
-            if mode.is_update() {
-                return update_snapshot();
+            return if mode.is_update() {
+                update_snapshot()
             } else {
                 write_new_png()?;
 
-                return Err(SnapshotError::OpenSnapshot {
+                Err(SnapshotError::OpenSnapshot {
                     path: snapshot_path.clone(),
                     err,
-                });
-            }
+                })
+            };
         }
     };
 
     if previous.dimensions() != new.dimensions() {
-        if mode.is_update() {
-            return update_snapshot();
+        return if mode.is_update() {
+            update_snapshot()
         } else {
             write_new_png()?;
 
-            return Err(SnapshotError::SizeMismatch {
+            Err(SnapshotError::SizeMismatch {
                 name,
                 expected: previous.dimensions(),
                 actual: new.dimensions(),
-            });
-        }
+            })
+        };
     }
 
     // Compare existing image to the new one:

crates/epaint/src/shapes/bezier_shape.rs

@@ -1,5 +1,3 @@
-#![expect(clippy::many_single_char_names)]
-
 use core::ops::Range;
 
 use crate::{Color32, PathShape, PathStroke, Shape};

crates/epaint/src/tessellator.rs

@@ -1519,11 +1519,11 @@ impl Tessellator {
 
                     if stroke.is_empty() {
                         return; // we are done
-                    } else {
-                        // we still need to do the stroke
-                        fill = Color32::TRANSPARENT; // don't fill again below
-                        break;
                     }
+
+                    // we still need to do the stroke
+                    fill = Color32::TRANSPARENT; // don't fill again below
+                    break;
                 }
             }
         }