diff options
| -rw-r--r-- | compiler/rustc_middle/src/ty/context.rs | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/compiler/rustc_middle/src/ty/context.rs b/compiler/rustc_middle/src/ty/context.rs index 2d2bbd22b98..4013f7b2c85 100644 --- a/compiler/rustc_middle/src/ty/context.rs +++ b/compiler/rustc_middle/src/ty/context.rs @@ -1327,7 +1327,9 @@ pub struct TyCtxt<'tcx> { gcx: &'tcx GlobalCtxt<'tcx>, } -// Explicitly implement `DynSync` and `DynSend` for `TyCtxt` to short circuit trait resolution. +// Explicitly implement `DynSync` and `DynSend` for `TyCtxt` to short circuit trait resolution. Its +// field are asserted to implement these traits below, so this is trivially safe, and it greatly +// speeds-up compilation of this crate and its dependents. unsafe impl DynSend for TyCtxt<'_> {} unsafe impl DynSync for TyCtxt<'_> {} fn _assert_tcx_fields() { |