1 files changed, 10 insertions, 0 deletions
diff --git a/compiler/rustc_ast/src/ast.rs b/compiler/rustc_ast/src/ast.rs
index f2e90fd8eed..58725a08c7c 100644
--- a/compiler/rustc_ast/src/ast.rs
+++ b/compiler/rustc_ast/src/ast.rs
@@ -313,6 +313,16 @@ pub enum TraitBoundModifier {
     MaybeConstMaybe,
 }
 
+impl TraitBoundModifier {
+    pub fn to_constness(self) -> Const {
+        match self {
+            // FIXME(effects) span
+            Self::MaybeConst => Const::Yes(DUMMY_SP),
+            _ => Const::No,
+        }
+    }
+}
+
 /// The AST represents all type param bounds as types.
 /// `typeck::collect::compute_bounds` matches these against
 /// the "special" built-in traits (see `middle::lang_items`) and