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-rw-r--r--compiler/rustc_const_eval/src/interpret/machine.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/compiler/rustc_const_eval/src/interpret/machine.rs b/compiler/rustc_const_eval/src/interpret/machine.rs
index d32a29ede49..b981a1ee2ca 100644
--- a/compiler/rustc_const_eval/src/interpret/machine.rs
+++ b/compiler/rustc_const_eval/src/interpret/machine.rs
@@ -512,6 +512,8 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized {
         Ok(())
     }
 
+    /// Evaluate the given constant. The `eval` function will do all the required evaluation,
+    /// but this hook has the chance to do some pre/postprocessing.
     #[inline(always)]
     fn eval_mir_constant<F>(
         ecx: &InterpCx<'mir, 'tcx, Self>,