[COMMITTED 056/143] gccrs: Use as member function instead of static cast

[arthur . cohen]

From: Pierre-Emmanuel Patry <pierre-emmanuel.pa...@embecosm.com>

gcc/rust/ChangeLog:

        * typecheck/rust-coercion.cc (TypeCoercionRules::do_coercion): Use as
        member function.
        (TypeCoercionRules::coerce_borrowed_pointer): Likewise.

Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.pa...@embecosm.com>
---
 gcc/rust/typecheck/rust-coercion.cc | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/gcc/rust/typecheck/rust-coercion.cc 
b/gcc/rust/typecheck/rust-coercion.cc
index cf285956d16..2b023ed0edd 100644
--- a/gcc/rust/typecheck/rust-coercion.cc
+++ b/gcc/rust/typecheck/rust-coercion.cc
@@ -88,15 +88,14 @@ TypeCoercionRules::do_coercion (TyTy::BaseType *receiver)
     {
     case TyTy::TypeKind::POINTER:
       {
-       TyTy::PointerType *ptr = static_cast<TyTy::PointerType *> (expected);
+       auto *ptr = expected->as<TyTy::PointerType> ();
        try_result = coerce_unsafe_ptr (receiver, ptr, ptr->mutability ());
        return !try_result.is_error ();
       }
 
     case TyTy::TypeKind::REF:
       {
-       TyTy::ReferenceType *ptr
-         = static_cast<TyTy::ReferenceType *> (expected);
+       auto *ptr = expected->as<TyTy::ReferenceType> ();
        try_result
          = coerce_borrowed_pointer (receiver, ptr, ptr->mutability ());
        return !try_result.is_error ();
@@ -272,12 +271,9 @@ TypeCoercionRules::coerce_borrowed_pointer (TyTy::BaseType 
*receiver,
     {
     case TyTy::TypeKind::REF:
       {
-       TyTy::ReferenceType *from
-         = static_cast<TyTy::ReferenceType *> (receiver);
-       from_mutbl = from->mutability ();
+       from_mutbl = receiver->as<TyTy::ReferenceType> ()->mutability ();
       }
       break;
-
     default:
       {
        rust_debug ("coerce_borrowed_pointer -- unify");
-- 
2.50.1