Remove unnecessary lifetime in `Widget` trait

examples/custom_widget/src/main.rs

@@ -25,7 +25,7 @@ mod circle {
         }
     }
 
-    impl<'a, Message, B> Widget<'a, Message, Renderer<B>> for Circle
+    impl<Message, B> Widget<Message, Renderer<B>> for Circle
     where
         B: Backend,
     {

examples/geometry/src/main.rs

@@ -27,7 +27,7 @@ mod rainbow {
         }
     }
 
-    impl<'a, Message, B> Widget<'a, Message, Renderer<B>> for Rainbow
+    impl<Message, B> Widget<Message, Renderer<B>> for Rainbow
     where
         B: Backend,
     {

graphics/src/renderer.rs

@@ -93,7 +93,7 @@ where
     fn explain<Message>(
         &mut self,
         defaults: &Defaults,
-        widget: &dyn Widget<'_, Message, Self>,
+        widget: &dyn Widget<Message, Self>,
         layout: Layout<'_>,
         cursor_position: Point,
         color: Color,

graphics/src/widget/canvas.rs

@@ -134,7 +134,7 @@ impl<Message, P: Program<Message>> Canvas<Message, P> {
     }
 }
 
-impl<'a, Message, P, B> Widget<'a, Message, Renderer<B>> for Canvas<Message, P>
+impl<Message, P, B> Widget<Message, Renderer<B>> for Canvas<Message, P>
 where
     P: Program<Message>,
     B: Backend,

native/src/element.rs

@@ -17,7 +17,7 @@ use std::rc::Rc;
 /// [`Element`]: struct.Element.html
 #[allow(missing_debug_implementations)]
 pub struct Element<'a, Message, Renderer> {
-    pub(crate) widget: Box<dyn Widget<'a, Message, Renderer> + 'a>,
+    pub(crate) widget: Box<dyn Widget<Message, Renderer> + 'a>,
 }
 
 impl<'a, Message, Renderer> Element<'a, Message, Renderer>
@@ -29,7 +29,7 @@ where
     /// [`Element`]: struct.Element.html
     /// [`Widget`]: widget/trait.Widget.html
     pub fn new(
-        widget: impl Widget<'a, Message, Renderer> + 'a,
+        widget: impl Widget<Message, Renderer> + 'a,
     ) -> Element<'a, Message, Renderer> {
         Element {
             widget: Box::new(widget),
@@ -282,13 +282,13 @@ where
 }
 
 struct Map<'a, A, B, Renderer> {
-    widget: Box<dyn Widget<'a, A, Renderer> + 'a>,
+    widget: Box<dyn Widget<A, Renderer> + 'a>,
     mapper: Rc<dyn Fn(A) -> B>,
 }
 
 impl<'a, A, B, Renderer> Map<'a, A, B, Renderer> {
     pub fn new<F>(
-        widget: Box<dyn Widget<'a, A, Renderer> + 'a>,
+        widget: Box<dyn Widget<A, Renderer> + 'a>,
         mapper: F,
     ) -> Map<'a, A, B, Renderer>
     where
@@ -301,7 +301,7 @@ impl<'a, A, B, Renderer> Map<'a, A, B, Renderer> {
     }
 }
 
-impl<'a, A, B, Renderer> Widget<'a, B, Renderer> for Map<'a, A, B, Renderer>
+impl<'a, A, B, Renderer> Widget<B, Renderer> for Map<'a, A, B, Renderer>
 where
     Renderer: crate::Renderer + 'a,
     A: 'static,
@@ -389,7 +389,7 @@ where
     }
 }
 
-impl<'a, Message, Renderer> Widget<'a, Message, Renderer>
+impl<'a, Message, Renderer> Widget<Message, Renderer>
     for Explain<'a, Message, Renderer>
 where
     Renderer: crate::Renderer + layout::Debugger,

native/src/layout/debugger.rs

@@ -18,7 +18,7 @@ pub trait Debugger: Renderer {
     fn explain<Message>(
         &mut self,
         defaults: &Self::Defaults,
-        widget: &dyn Widget<'_, Message, Self>,
+        widget: &dyn Widget<Message, Self>,
         layout: Layout<'_>,
         cursor_position: Point,
         color: Color,

native/src/overlay/menu.rs

@@ -260,7 +260,7 @@ struct List<'a, T, Message, Renderer: self::Renderer> {
     style: <Renderer as self::Renderer>::Style,
 }
 
-impl<'a, T, Message, Renderer: self::Renderer> Widget<'a, Message, Renderer>
+impl<'a, T, Message, Renderer: self::Renderer> Widget<Message, Renderer>
     for List<'a, T, Message, Renderer>
 where
     T: Clone + ToString,

native/src/widget.rs

@@ -97,7 +97,7 @@ use crate::{layout, overlay, Clipboard, Event, Hasher, Layout, Length, Point};
 /// [`geometry`]: https://github.com/hecrj/iced/tree/0.1/examples/geometry
 /// [`lyon`]: https://github.com/nical/lyon
 /// [`iced_wgpu`]: https://github.com/hecrj/iced/tree/0.1/wgpu
-pub trait Widget<'a, Message, Renderer>
+pub trait Widget<Message, Renderer>
 where
     Renderer: crate::Renderer,
 {
@@ -179,10 +179,10 @@ where
     ) {
     }
 
-    fn overlay<'b>(
+    fn overlay(
-        &'b mut self,
+        &mut self,
         _layout: Layout<'_>,
-    ) -> Option<overlay::Element<'b, Message, Renderer>> {
+    ) -> Option<overlay::Element<'_, Message, Renderer>> {
         None
     }
 }

native/src/widget/button.rs

@@ -139,7 +139,7 @@ impl State {
     }
 }
 
-impl<'a, Message, Renderer> Widget<'a, Message, Renderer>
+impl<'a, Message, Renderer> Widget<Message, Renderer>
     for Button<'a, Message, Renderer>
 where
     Renderer: self::Renderer,

native/src/widget/checkbox.rs

@@ -106,7 +106,7 @@ impl<Message, Renderer: self::Renderer + text::Renderer>
     }
 }
 
-impl<'a, Message, Renderer> Widget<'a, Message, Renderer>
+impl<Message, Renderer> Widget<Message, Renderer>
     for Checkbox<Message, Renderer>
 where
     Renderer: self::Renderer + text::Renderer + row::Renderer,

native/src/widget/column.rs

@@ -121,7 +121,7 @@ impl<'a, Message, Renderer> Column<'a, Message, Renderer> {
     }
 }
 
-impl<'a, Message, Renderer> Widget<'a, Message, Renderer>
+impl<'a, Message, Renderer> Widget<Message, Renderer>
     for Column<'a, Message, Renderer>
 where
     Renderer: self::Renderer,

native/src/widget/combo_box.rs

@@ -93,7 +93,7 @@ where
     }
 }
 
-impl<'a, T: 'a, Message, Renderer> Widget<'a, Message, Renderer>
+impl<'a, T: 'a, Message, Renderer> Widget<Message, Renderer>
     for ComboBox<'a, T, Message, Renderer>
 where
     T: Clone + ToString + Eq,

native/src/widget/container.rs

@@ -129,7 +129,7 @@ where
     }
 }
 
-impl<'a, Message, Renderer> Widget<'a, Message, Renderer>
+impl<'a, Message, Renderer> Widget<Message, Renderer>
     for Container<'a, Message, Renderer>
 where
     Renderer: self::Renderer,

native/src/widget/image.rs

@@ -54,7 +54,7 @@ impl Image {
     }
 }
 
-impl<'a, Message, Renderer> Widget<'a, Message, Renderer> for Image
+impl<Message, Renderer> Widget<Message, Renderer> for Image
 where
     Renderer: self::Renderer,
 {

native/src/widget/pane_grid.rs

@@ -402,7 +402,7 @@ pub struct KeyPressEvent {
     pub modifiers: keyboard::ModifiersState,
 }
 
-impl<'a, Message, Renderer> Widget<'a, Message, Renderer>
+impl<'a, Message, Renderer> Widget<Message, Renderer>
     for PaneGrid<'a, Message, Renderer>
 where
     Renderer: self::Renderer + container::Renderer,

native/src/widget/progress_bar.rs

@@ -70,8 +70,7 @@ impl<Renderer: self::Renderer> ProgressBar<Renderer> {
     }
 }
 
-impl<'a, Message, Renderer> Widget<'a, Message, Renderer>
+impl<Message, Renderer> Widget<Message, Renderer> for ProgressBar<Renderer>
-    for ProgressBar<Renderer>
 where
     Renderer: self::Renderer,
 {

native/src/widget/radio.rs

@@ -121,8 +121,7 @@ impl<Message, Renderer: self::Renderer + text::Renderer>
     }
 }
 
-impl<'a, Message, Renderer> Widget<'a, Message, Renderer>
+impl<Message, Renderer> Widget<Message, Renderer> for Radio<Message, Renderer>
-    for Radio<Message, Renderer>
 where
     Renderer: self::Renderer + text::Renderer + row::Renderer,
     Message: Clone,

native/src/widget/row.rs

@@ -122,7 +122,7 @@ impl<'a, Message, Renderer> Row<'a, Message, Renderer> {
     }
 }
 
-impl<'a, Message, Renderer> Widget<'a, Message, Renderer>
+impl<'a, Message, Renderer> Widget<Message, Renderer>
     for Row<'a, Message, Renderer>
 where
     Renderer: self::Renderer,

native/src/widget/scrollable.rs

@@ -110,7 +110,7 @@ impl<'a, Message, Renderer: self::Renderer> Scrollable<'a, Message, Renderer> {
     }
 }
 
-impl<'a, Message, Renderer> Widget<'a, Message, Renderer>
+impl<'a, Message, Renderer> Widget<Message, Renderer>
     for Scrollable<'a, Message, Renderer>
 where
     Renderer: self::Renderer,

native/src/widget/slider.rs

@@ -154,7 +154,7 @@ impl State {
     }
 }
 
-impl<'a, T, Message, Renderer> Widget<'a, Message, Renderer>
+impl<'a, T, Message, Renderer> Widget<Message, Renderer>
     for Slider<'a, T, Message, Renderer>
 where
     T: Copy + Into<f64> + num_traits::FromPrimitive,

native/src/widget/space.rs

@@ -43,7 +43,7 @@ impl Space {
     }
 }
 
-impl<'a, Message, Renderer> Widget<'a, Message, Renderer> for Space
+impl<Message, Renderer> Widget<Message, Renderer> for Space
 where
     Renderer: self::Renderer,
 {

native/src/widget/svg.rs

@@ -60,7 +60,7 @@ impl Svg {
     }
 }
 
-impl<'a, Message, Renderer> Widget<'a, Message, Renderer> for Svg
+impl<Message, Renderer> Widget<Message, Renderer> for Svg
 where
     Renderer: self::Renderer,
 {

native/src/widget/text.rs

@@ -112,7 +112,7 @@ impl<Renderer: self::Renderer> Text<Renderer> {
     }
 }
 
-impl<'a, Message, Renderer> Widget<'a, Message, Renderer> for Text<Renderer>
+impl<Message, Renderer> Widget<Message, Renderer> for Text<Renderer>
 where
     Renderer: self::Renderer,
 {

native/src/widget/text_input.rs

@@ -165,7 +165,7 @@ impl<'a, Message, Renderer: self::Renderer> TextInput<'a, Message, Renderer> {
     }
 }
 
-impl<'a, Message, Renderer> Widget<'a, Message, Renderer>
+impl<'a, Message, Renderer> Widget<Message, Renderer>
     for TextInput<'a, Message, Renderer>
 where
     Renderer: self::Renderer,