Set MSRV to 1.71

Cargo.toml

@@ -2,6 +2,7 @@
 name = "libcosmic"
 version = "0.1.0"
 edition = "2021"
+rust-version = "1.71"
 
 [lib]
 name = "cosmic"

src/widget/segmented_button/horizontal.rs

@@ -45,11 +45,11 @@ where
     }
 
     #[allow(clippy::cast_precision_loss)]
-    fn variant_button_bounds(
-        &self,
-        state: &LocalState,
+    fn variant_button_bounds<'b>(
+        &'b self,
+        state: &'b LocalState,
         mut bounds: Rectangle,
-    ) -> impl Iterator<Item = (Entity, Rectangle)> {
+    ) -> Box<dyn Iterator<Item = (Entity, Rectangle)> + 'b> {
         let num = state.buttons_visible;
         let spacing = f32::from(self.spacing);
         let mut homogenous_width = 0.0;
@@ -66,6 +66,7 @@ where
                 / num as f32;
         }
 
+        Box::new(
             self.model
                 .order
                 .iter()
@@ -84,7 +85,8 @@ where
 
                     bounds.x += this_bounds.width + spacing;
                     (key, this_bounds)
-            })
+                }),
+        )
     }
 
     #[allow(clippy::cast_precision_loss)]

src/widget/segmented_button/vertical.rs

@@ -45,13 +45,14 @@ where
     }
 
     #[allow(clippy::cast_precision_loss)]
-    fn variant_button_bounds(
-        &self,
-        state: &LocalState,
+    fn variant_button_bounds<'b>(
+        &'b self,
+        state: &'b LocalState,
         mut bounds: Rectangle,
-    ) -> impl Iterator<Item = (Entity, Rectangle)> {
+    ) -> Box<dyn Iterator<Item = (Entity, Rectangle)> + 'b> {
         let spacing = f32::from(self.spacing);
 
+        Box::new(
             self.model
                 .order
                 .iter()
@@ -62,7 +63,8 @@ where
                     this_bounds.height = state.internal_layout[0].height;
                     bounds.y += this_bounds.height + spacing;
                     (key, this_bounds)
-            })
+                }),
+        )
     }
 
     #[allow(clippy::cast_precision_loss)]

src/widget/segmented_button/widget.rs

@@ -33,11 +33,11 @@ pub trait SegmentedVariant {
     ) -> super::Appearance;
 
     /// Calculates the bounds for visible buttons.
-    fn variant_button_bounds(
-        &self,
-        state: &LocalState,
+    fn variant_button_bounds<'b>(
+        &'b self,
+        state: &'b LocalState,
         bounds: Rectangle,
-    ) -> impl Iterator<Item = (Entity, Rectangle)>;
+    ) -> Box<dyn Iterator<Item = (Entity, Rectangle)> + 'b>;
 
     /// Calculates the layout of this variant.
     fn variant_layout(