diff options
Diffstat (limited to 'src/libsyntax')
| -rw-r--r-- | src/libsyntax/ext/expand.rs | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/libsyntax/ext/expand.rs b/src/libsyntax/ext/expand.rs index ec693fa1f08..ad05e2f21e6 100644 --- a/src/libsyntax/ext/expand.rs +++ b/src/libsyntax/ext/expand.rs @@ -456,6 +456,11 @@ pub fn core_macros() -> ~str { if !$cond { ::core::sys::fail_assert(stringify!($cond), file!(), line!()) } + }; + ($cond:expr, $msg:expr) => { + if !$cond { + ::core::sys::fail_assert($msg, file!(), line!()) + } } ) |