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core: allow messages in unimplemented!() macro

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Sean McArthur 2017-06-07 17:06:55 -07:00
parent 81734e0e06
commit f51771939b
1 changed files with 2 additions and 1 deletions
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3
src/libcore/macros.rs
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@ -542,7 +542,8 @@ macro_rules! unreachable {
#[macro_export] #[macro_export]
#[stable(feature = "rust1", since = "1.0.0")] #[stable(feature = "rust1", since = "1.0.0")]
macro_rules! unimplemented { macro_rules! unimplemented {
() => (panic!("not yet implemented")) () => (panic!("not yet implemented"));
($($arg:tt)+) => (panic!("not yet implemented: {}", format_args!($($arg)*)));
} }
/// Built-in macros to the compiler itself. /// Built-in macros to the compiler itself.