cleanup: replace `as[_mut]_slice()` calls with deref coercions

1 files changed, 5 insertions, 5 deletions

diff --git a/src/libsyntax/diagnostics/macros.rs b/src/libsyntax/diagnostics/macros.rs
index 9321d3ca3df..54689a1f77a 100644
--- a/src/libsyntax/diagnostics/macros.rs
+++ b/src/libsyntax/diagnostics/macros.rs
@@ -18,7 +18,7 @@ macro_rules! register_diagnostic {
 macro_rules! span_fatal {
     ($session:expr, $span:expr, $code:ident, $($message:tt)*) => ({
         __diagnostic_used!($code);
-        $session.span_fatal_with_code($span, format!($($message)*).as_slice(), stringify!($code))
+        $session.span_fatal_with_code($span, &format!($($message)*), stringify!($code))
     })
 }
 
@@ -26,7 +26,7 @@ macro_rules! span_fatal {
 macro_rules! span_err {
     ($session:expr, $span:expr, $code:ident, $($message:tt)*) => ({
         __diagnostic_used!($code);
-        $session.span_err_with_code($span, format!($($message)*).as_slice(), stringify!($code))
+        $session.span_err_with_code($span, &format!($($message)*), stringify!($code))
     })
 }
 
@@ -34,21 +34,21 @@ macro_rules! span_err {
 macro_rules! span_warn {
     ($session:expr, $span:expr, $code:ident, $($message:tt)*) => ({
         __diagnostic_used!($code);
-        $session.span_warn_with_code($span, format!($($message)*).as_slice(), stringify!($code))
+        $session.span_warn_with_code($span, &format!($($message)*), stringify!($code))
     })
 }
 
 #[macro_export]
 macro_rules! span_note {
     ($session:expr, $span:expr, $($message:tt)*) => ({
-        ($session).span_note($span, format!($($message)*).as_slice())
+        ($session).span_note($span, &format!($($message)*))
     })
 }
 
 #[macro_export]
 macro_rules! span_help {
     ($session:expr, $span:expr, $($message:tt)*) => ({
-        ($session).span_help($span, format!($($message)*).as_slice())
+        ($session).span_help($span, &format!($($message)*))
     })
 }