diff options
Diffstat (limited to 'compiler/rustc_builtin_macros/src/lib.rs')
| -rw-r--r-- | compiler/rustc_builtin_macros/src/lib.rs | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/compiler/rustc_builtin_macros/src/lib.rs b/compiler/rustc_builtin_macros/src/lib.rs index 11565ba72..8aeb3b82a 100644 --- a/compiler/rustc_builtin_macros/src/lib.rs +++ b/compiler/rustc_builtin_macros/src/lib.rs @@ -9,13 +9,16 @@ #![feature(if_let_guard)] #![feature(is_sorted)] #![feature(let_chains)] -#![feature(let_else)] +#![cfg_attr(bootstrap, feature(let_else))] #![feature(proc_macro_internals)] #![feature(proc_macro_quote)] #![recursion_limit = "256"] extern crate proc_macro; +#[macro_use] +extern crate tracing; + use crate::deriving::*; use rustc_expand::base::{MacroExpanderFn, ResolverExpand, SyntaxExtensionKind}; |