Refactor the logging system for fewer allocations

This lifts various restrictions on the runtime, for example the character limit
when logging a message. Right now the old debug!-style macros still involve
allocating (because they use fmt! syntax), but the new debug2! macros don't
involve allocating at all (unless the formatter for a type requires allocation.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/libstd/std.rs b/src/libstd/std.rs
index 5c1bac7418e..b06385cbcf4 100644
--- a/src/libstd/std.rs
+++ b/src/libstd/std.rs
@@ -224,4 +224,5 @@ mod std {
     pub use os;
     pub use fmt;
     pub use to_bytes;
+    pub use logging;
 }