Group the try_eval functions before the eval functions

src/librustc_middle/ty/consts.rs

@@ -163,6 +163,16 @@ impl<'tcx> Const<'tcx> {
         self.val.eval(tcx, param_env).try_to_bits(size)
     }
 
+    #[inline]
+    pub fn try_eval_bool(&self, tcx: TyCtxt<'tcx>, param_env: ParamEnv<'tcx>) -> Option<bool> {
+        self.val.eval(tcx, param_env).try_to_bool()
+    }
+
+    #[inline]
+    pub fn try_eval_usize(&self, tcx: TyCtxt<'tcx>, param_env: ParamEnv<'tcx>) -> Option<u64> {
+        self.val.eval(tcx, param_env).try_to_machine_usize(tcx)
+    }
+
     #[inline]
     /// Tries to evaluate the constant if it is `Unevaluated`. If that doesn't succeed, return the
     /// unevaluated constant.
@@ -177,16 +187,6 @@ impl<'tcx> Const<'tcx> {
         }
     }
 
-    #[inline]
-    pub fn try_eval_bool(&self, tcx: TyCtxt<'tcx>, param_env: ParamEnv<'tcx>) -> Option<bool> {
-        self.val.eval(tcx, param_env).try_to_bool()
-    }
-
-    #[inline]
-    pub fn try_eval_usize(&self, tcx: TyCtxt<'tcx>, param_env: ParamEnv<'tcx>) -> Option<u64> {
-        self.val.eval(tcx, param_env).try_to_machine_usize(tcx)
-    }
-
     #[inline]
     /// Panics if the value cannot be evaluated or doesn't contain a valid integer of the given type.
     pub fn eval_bits(&self, tcx: TyCtxt<'tcx>, param_env: ParamEnv<'tcx>, ty: Ty<'tcx>) -> u128 {