[COMMITTED] gccrs: Cleanup formatting of backend expression visitor

[Arthur Cohen]

From: Philip Herron <philip.her...@embecosm.com>

gcc/rust/ChangeLog:

        * backend/rust-compile-expr.h: Formatting.

Tested on x86_64-pc-linux-gnu, committed on master.

---
 gcc/rust/backend/rust-compile-expr.h | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/gcc/rust/backend/rust-compile-expr.h 
b/gcc/rust/backend/rust-compile-expr.h
index 83293a40b44..845511f9f43 100644
--- a/gcc/rust/backend/rust-compile-expr.h
+++ b/gcc/rust/backend/rust-compile-expr.h
@@ -68,24 +68,31 @@ public:
   void visit (HIR::RangeFullExpr &expr) override;
   void visit (HIR::RangeFromToInclExpr &expr) override;
 
-  // Empty visit for unused Expression HIR nodes.
+  // TODO
   void visit (HIR::ClosureExprInner &) override {}
   void visit (HIR::ClosureExprInnerTyped &) override {}
-  void visit (HIR::StructExprFieldIdentifier &) override {}
-  void visit (HIR::StructExprFieldIdentifierValue &) override {}
-  void visit (HIR::StructExprFieldIndexValue &) override {}
   void visit (HIR::ErrorPropagationExpr &) override {}
   void visit (HIR::RangeToInclExpr &) override {}
-  void visit (HIR::WhileLetLoopExpr &) override {}
   void visit (HIR::ForLoopExpr &) override {}
+
+  // TODO
+  // these need to be sugared in the HIR to if statements and a match
+  void visit (HIR::WhileLetLoopExpr &) override {}
   void visit (HIR::IfExprConseqIfLet &) override {}
   void visit (HIR::IfLetExpr &) override {}
   void visit (HIR::IfLetExprConseqElse &) override {}
   void visit (HIR::IfLetExprConseqIf &) override {}
   void visit (HIR::IfLetExprConseqIfLet &) override {}
+
+  // lets not worry about async yet....
   void visit (HIR::AwaitExpr &) override {}
   void visit (HIR::AsyncBlockExpr &) override {}
 
+  // nothing to do for these
+  void visit (HIR::StructExprFieldIdentifier &) override {}
+  void visit (HIR::StructExprFieldIdentifierValue &) override {}
+  void visit (HIR::StructExprFieldIndexValue &) override {}
+
 protected:
   tree get_fn_addr_from_dyn (const TyTy::DynamicObjectType *dyn,
                             TyTy::BaseType *receiver, TyTy::FnType *fntype,
-- 
2.39.1

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