Bump rust to 1.57, fix new lint failures

3 files changed, 4 insertions, 34 deletions

diff --git a/helix-tui/src/buffer.rs b/helix-tui/src/buffer.rs
index f480bc2f..c49a0200 100644
--- a/helix-tui/src/buffer.rs
+++ b/helix-tui/src/buffer.rs
@@ -102,7 +102,7 @@ impl Default for Cell {
 /// buf.get_mut(5, 0).set_char('x');
 /// assert_eq!(buf.get(5, 0).symbol, "x");
 /// ```
-#[derive(Debug, Clone, PartialEq)]
+#[derive(Debug, Default, Clone, PartialEq)]
 pub struct Buffer {
     /// The area represented by this buffer
     pub area: Rect,
@@ -111,15 +111,6 @@ pub struct Buffer {
     pub content: Vec<Cell>,
 }
 
-impl Default for Buffer {
-    fn default() -> Buffer {
-        Buffer {
-            area: Default::default(),
-            content: Vec::new(),
-        }
-    }
-}
-
 impl Buffer {
     /// Returns a Buffer with all cells set to the default one
     pub fn empty(area: Rect) -> Buffer {
diff --git a/helix-tui/src/text.rs b/helix-tui/src/text.rs
index b8e52479..8a974ddb 100644
--- a/helix-tui/src/text.rs
+++ b/helix-tui/src/text.rs
@@ -195,15 +195,9 @@ impl<'a> From<&'a str> for Span<'a> {
 }
 
 /// A string composed of clusters of graphemes, each with their own style.
-#[derive(Debug, Clone, PartialEq)]
+#[derive(Debug, Default, Clone, PartialEq)]
 pub struct Spans<'a>(pub Vec<Span<'a>>);
 
-impl<'a> Default for Spans<'a> {
-    fn default() -> Spans<'a> {
-        Spans(Vec::new())
-    }
-}
-
 impl<'a> Spans<'a> {
     /// Returns the width of the underlying string.
     ///
@@ -280,17 +274,11 @@ impl<'a> From<Spans<'a>> for String {
 /// text.extend(Text::styled("Some more lines\nnow with more style!", style));
 /// assert_eq!(6, text.height());
 /// ```
-#[derive(Debug, Clone, PartialEq)]
+#[derive(Debug, Default, Clone, PartialEq)]
 pub struct Text<'a> {
     pub lines: Vec<Spans<'a>>,
 }
 
-impl<'a> Default for Text<'a> {
-    fn default() -> Text<'a> {
-        Text { lines: Vec::new() }
-    }
-}
-
 impl<'a> Text<'a> {
     /// Create some text (potentially multiple lines) with no style.
     ///
diff --git a/helix-tui/src/widgets/table.rs b/helix-tui/src/widgets/table.rs
index d7caa0b0..6aee5988 100644
--- a/helix-tui/src/widgets/table.rs
+++ b/helix-tui/src/widgets/table.rs
@@ -363,21 +363,12 @@ impl<'a> Table<'a> {
     }
 }
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Default, Clone)]
 pub struct TableState {
     pub offset: usize,
     pub selected: Option<usize>,
 }
 
-impl Default for TableState {
-    fn default() -> TableState {
-        TableState {
-            offset: 0,
-            selected: None,
-        }
-    }
-}
-
 impl TableState {
     pub fn selected(&self) -> Option<usize> {
         self.selected