refactor: Implement RawStream for Box<T> generically

Author: DaniPopes

crates/anstream/src/stream.rs

@@ -12,6 +12,7 @@ pub trait RawStream:
 }
 
 impl<T: RawStream + ?Sized> RawStream for &mut T {}
+impl<T: RawStream + ?Sized> RawStream for Box<T> {}
 
 impl RawStream for std::io::Stdout {}
 
@@ -21,7 +22,7 @@ impl RawStream for std::io::Stderr {}
 
 impl RawStream for std::io::StderrLock<'_> {}
 
-impl RawStream for Box<dyn std::io::Write> {}
+impl RawStream for dyn std::io::Write {}
 
 impl RawStream for Vec<u8> {}
 
@@ -50,6 +51,13 @@ impl<T: IsTerminal + ?Sized> IsTerminal for &mut T {
     }
 }
 
+impl<T: IsTerminal + ?Sized> IsTerminal for Box<T> {
+    #[inline]
+    fn is_terminal(&self) -> bool {
+        (**self).is_terminal()
+    }
+}
+
 impl IsTerminal for std::io::Stdout {
     #[inline]
     fn is_terminal(&self) -> bool {
@@ -78,7 +86,7 @@ impl IsTerminal for std::io::StderrLock<'_> {
     }
 }
 
-impl IsTerminal for Box<dyn std::io::Write> {
+impl IsTerminal for dyn std::io::Write {
     #[inline]
     fn is_terminal(&self) -> bool {
         false
@@ -154,7 +162,7 @@ impl AsLockedWrite for std::io::StderrLock<'static> {
     }
 }
 
-impl AsLockedWrite for Box<dyn std::io::Write> {
+impl AsLockedWrite for dyn std::io::Write {
     type Write<'w> = &'w mut Self;
 
     #[inline]
@@ -196,6 +204,7 @@ mod private {
 
     impl<T: Sealed + ?Sized> Sealed for &T {}
     impl<T: Sealed + ?Sized> Sealed for &mut T {}
+    impl<T: Sealed + ?Sized> Sealed for Box<T> {}
 
     impl Sealed for std::io::Stdout {}
 
@@ -205,7 +214,7 @@ mod private {
 
     impl Sealed for std::io::StderrLock<'_> {}
 
-    impl Sealed for Box<dyn std::io::Write> {}
+    impl Sealed for dyn std::io::Write {}
 
     impl Sealed for Vec<u8> {}
 

crates/anstyle-wincon/src/ansi.rs

@@ -1,7 +1,7 @@
 //! Low-level ANSI-styling
 
 /// Write ANSI colored text to the stream
-pub fn write_colored<S: std::io::Write>(
+pub fn write_colored<S: std::io::Write + ?Sized>(
     stream: &mut S,
     fg: Option<anstyle::AnsiColor>,
     bg: Option<anstyle::AnsiColor>,

crates/anstyle-wincon/src/stream.rs

@@ -20,7 +20,18 @@ impl<T: WinconStream + ?Sized> WinconStream for &mut T {
     }
 }
 
-impl WinconStream for Box<dyn std::io::Write> {
+impl<T: WinconStream + ?Sized> WinconStream for Box<T> {
+    fn write_colored(
+        &mut self,
+        fg: Option<anstyle::AnsiColor>,
+        bg: Option<anstyle::AnsiColor>,
+        data: &[u8],
+    ) -> std::io::Result<usize> {
+        (**self).write_colored(fg, bg, data)
+    }
+}
+
+impl WinconStream for dyn std::io::Write {
     fn write_colored(
         &mut self,
         fg: Option<anstyle::AnsiColor>,