Fix release build

crates/egui/src/id.rs

@@ -1,7 +1,5 @@
 // TODO(emilk): have separate types `PositionId` and `UniqueId`. ?
 
-use crate::CollapsingHeader;
-use crate::id::id_source::IdSource;
 use epaint::Color32;
 use std::num::NonZeroU64;
 
@@ -39,6 +37,7 @@ pub struct Id(NonZeroU64);
 impl nohash_hasher::IsEnabled for Id {}
 
 pub trait AsId: std::hash::Hash + std::fmt::Debug {}
+
 impl<T: std::hash::Hash + std::fmt::Debug> AsId for T {}
 
 impl Id {
@@ -118,37 +117,6 @@ impl Id {
         Self(NonZeroU64::new(value).expect("Id must be non-zero."))
     }
 
-    fn tree_ui(ui: &mut crate::Ui, id: Self, prefix: &str, depth: usize) {
-        let info = id.info();
-        if let Some(info) = info {
-            let response =
-                CollapsingHeader::new(format!("{}Id({})", prefix, id.short_debug_format()))
-                    .default_open(depth < 4)
-                    .show(ui, |ui| {
-                        match info.source {
-                            IdSource::Id(id_source) => {
-                                Self::tree_ui(ui, id_source, "Source: ", depth + 1);
-                            }
-                            IdSource::Other(other) => {
-                                ui.horizontal(|ui| {
-                                    ui.add_space(ui.spacing().indent);
-                                    ui.label("Source:");
-                                    ui.code(other);
-                                });
-                            }
-                        }
-
-                        if let Some(parent) = info.parent {
-                            Self::tree_ui(ui, parent, "Parent: ", depth + 1);
-                        }
-                    });
-
-            if response.header_response.hovered() {
-                id.try_highlight(ui.ctx());
-            }
-        }
-    }
-
     pub fn try_highlight(self, ctx: &crate::Context) {
         let response = ctx.read_response(self);
         if let Some(response) = response {
@@ -166,13 +134,16 @@ impl Id {
     }
 
     pub fn ui(self, ui: &mut crate::Ui) -> crate::Response {
-        let data = self.info();
-        let label = if let Some(data) = &data {
-            format!("{} ({})", self.short_debug_format(), data.source)
-        } else {
-            self.short_debug_format()
-        };
-        let response = ui.code(label).on_hover_ui(|ui| {
+        #[cfg(debug_assertions)]
+        let debug_label = self
+            .info()
+            .map(|info| format!("{} ({})", self.short_debug_format(), info.source));
+        #[cfg(not(debug_assertions))]
+        let debug_label: Option<String> = None;
+        let response = ui.code(debug_label.unwrap_or_else(|| self.short_debug_format()));
+
+        #[cfg(debug_assertions)]
+        let response = response.on_hover_ui(|ui| {
             Self::tree_ui(ui, self, "", 0);
         });
 
@@ -186,7 +157,7 @@ impl Id {
 
 #[cfg(debug_assertions)]
 mod id_source {
-    use crate::{AsId, Id};
+    use crate::{AsId, CollapsingHeader, Id};
     use ahash::HashMap;
     use epaint::mutex::RwLock;
     use std::fmt::{Display, Formatter};
@@ -197,6 +168,7 @@ mod id_source {
     pub struct IdInfo {
         /// What was this Id generated from?
         pub source: IdSource,
+
         /// If the Id was crated via [`Id::with`], what was the parent Id?
         pub parent: Option<Id>,
     }
@@ -303,9 +275,43 @@ mod id_source {
     }
 
     impl Id {
+        /// Get info about this id (what source was it generated from, what parent does it have)?
+        ///
+        /// Only available with `#[cfg(debug_assertions)]`.
         pub fn info(&self) -> Option<IdInfo> {
             ID_MAP.read().get(self).cloned()
         }
+
+        pub(super) fn tree_ui(ui: &mut crate::Ui, id: Self, prefix: &str, depth: usize) {
+            let info = id.info();
+            if let Some(info) = info {
+                let response =
+                    CollapsingHeader::new(format!("{}Id({})", prefix, id.short_debug_format()))
+                        .default_open(depth < 4)
+                        .show(ui, |ui| {
+                            match info.source {
+                                IdSource::Id(id_source) => {
+                                    Self::tree_ui(ui, id_source, "Source: ", depth + 1);
+                                }
+                                IdSource::Other(other) => {
+                                    ui.horizontal(|ui| {
+                                        ui.add_space(ui.spacing().indent);
+                                        ui.label("Source:");
+                                        ui.code(other);
+                                    });
+                                }
+                            }
+
+                            if let Some(parent) = info.parent {
+                                Self::tree_ui(ui, parent, "Parent: ", depth + 1);
+                            }
+                        });
+
+                if response.header_response.hovered() {
+                    id.try_highlight(ui.ctx());
+                }
+            }
+        }
     }
 
     #[test]

examples/hello_world_simple/src/main.rs

@@ -2,7 +2,6 @@
 #![expect(rustdoc::missing_crate_level_docs)] // it's an example
 
 use eframe::egui;
-use eframe::egui::{Id, Ui};
 
 fn main() -> eframe::Result {
     env_logger::init(); // Log to stderr (if you run with `RUST_LOG=debug`).
@@ -29,18 +28,6 @@ fn main() -> eframe::Result {
                 age += 1;
             }
             ui.label(format!("Hello '{name}', age {age}"));
-
-            Id::new(Id::new("Hi").with((123, "456")))
-                .with(Id::new("lol"))
-                .ui(ui);
-
-            ui.id().ui(ui);
-            Id::ui(Ui::id(ui), ui);
-
-            ui.unique_id().ui(ui);
-
-            let some_button = ui.button("Some button");
-            some_button.id.ui(ui);
         });
     })
 }