Change visit_precise_capturing_arg so it returns a Self::Result

Author: maxcabrajac

compiler/rustc_ast/src/visit.rs

@@ -200,8 +200,8 @@ pub trait Visitor<'ast>: Sized {
 fnvisit_param_bound(&mutself,bounds:&'astGenericBound,_ctxt:BoundKind) -> Self::Result{
 walk_param_bound(self, bounds)
 }
-fnvisit_precise_capturing_arg(&mutself,arg:&'astPreciseCapturingArg){
-walk_precise_capturing_arg(self, arg);
+fnvisit_precise_capturing_arg(&mutself,arg:&'astPreciseCapturingArg)-> Self::Result{
+walk_precise_capturing_arg(self, arg)
 }
 fnvisit_poly_trait_ref(&mutself,t:&'astPolyTraitRef) -> Self::Result{
 walk_poly_trait_ref(self, t)
@@ -730,14 +730,10 @@ pub fn walk_param_bound<'a, V: Visitor<'a>>(visitor: &mut V, bound: &'a GenericB
 pubfnwalk_precise_capturing_arg<'a,V:Visitor<'a>>(
 visitor:&mutV,
 arg:&'aPreciseCapturingArg,
-){
+)-> V::Result{
 match arg {
-PreciseCapturingArg::Lifetime(lt) => {
- visitor.visit_lifetime(lt,LifetimeCtxt::GenericArg);
-}
-PreciseCapturingArg::Arg(path, id) => {
- visitor.visit_path(path,*id);
-}
+PreciseCapturingArg::Lifetime(lt) => visitor.visit_lifetime(lt,LifetimeCtxt::GenericArg),
+PreciseCapturingArg::Arg(path, id) => visitor.visit_path(path,*id),
 }
 }