Don't reborrow the target of a write!()

lambda-fairy · lambda-fairy · commit 7c3efcc5bb26 · 2015-04-01T19:48:49.000+13:00
This means passing in e.g. a `Vec<u8>` or `String` will work as intended, rather than deref-ing to `&mut [u8]` or `&mut str`. [breaking-change] Closes #23768
diff --git a/src/libcore/macros.rs b/src/libcore/macros.rs
@@ -184,7 +184,7 @@ macro_rules! try {
 /// ```
 #[macro_export]
 macro_rules! write {
-    ($dst:expr, $($arg:tt)*) => ((&mut *$dst).write_fmt(format_args!($($arg)*)))
+    ($dst:expr, $($arg:tt)*) => ($dst.write_fmt(format_args!($($arg)*)))
 }
 
 /// Equivalent to the `write!` macro, except that a newline is appended after

Original file line number	Diff line number	Diff line change
`@@ -184,7 +184,7 @@ macro_rules! try {`
`184`	`184`	/// ```
`185`	`185`	`#[macro_export]`
`186`	`186`	`macro_rules! write {`
`187`		`- ($dst:expr, $($arg:tt)) => ((&mut $dst).write_fmt(format_args!($($arg)*)))`
	`187`	`+ ($dst:expr, $($arg:tt)) => ($dst.write_fmt(format_args!($($arg))))`
`188`	`188`	`}`
`189`	`189`
`190`	`190`	/// Equivalent to the `write!` macro, except that a newline is appended after