[gcc r15-8532] gccrs: Refactor optional initializers

[Arthur Cohen]

https://gcc.gnu.org/g:45d4f73b81dcd26df03e5e210a1f50803d1d4733

commit r15-8532-g45d4f73b81dcd26df03e5e210a1f50803d1d4733
Author: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>
Date:   Tue Nov 19 17:24:59 2024 +0100

    gccrs: Refactor optional initializers
    
    Refactor some optional initializer in the lowering stage to make them
    more readable.
    
    gcc/rust/ChangeLog:
    
            * hir/rust-ast-lower-stmt.cc (ASTLoweringStmt::visit): Change the
            ternary expression with a more readable if.
    
    Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

Diff:
---
 gcc/rust/hir/rust-ast-lower-stmt.cc | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/gcc/rust/hir/rust-ast-lower-stmt.cc b/gcc/rust/hir/rust-ast-lower-stmt.cc
index 5a825fd11390..8244e8ae2ba4 100644
--- a/gcc/rust/hir/rust-ast-lower-stmt.cc
+++ b/gcc/rust/hir/rust-ast-lower-stmt.cc
@@ -70,15 +70,17 @@ ASTLoweringStmt::visit (AST::LetStmt &stmt)
   HIR::Pattern *variables
     = ASTLoweringPattern::translate (stmt.get_pattern (), true);
 
-  auto type
-    = stmt.has_type () ? tl::optional<std::unique_ptr<Type>> (
-	std::unique_ptr<Type> (ASTLoweringType::translate (stmt.get_type ())))
-		       : tl::nullopt;
-  auto init_expression
-    = stmt.has_init_expr ()
-	? tl::optional<std::unique_ptr<Expr>> (std::unique_ptr<HIR::Expr> (
-	  ASTLoweringExpr::translate (stmt.get_init_expr ())))
-	: tl::nullopt;
+  tl::optional<std::unique_ptr<Type>> type = tl::nullopt;
+
+  if (stmt.has_type ())
+    type
+      = std::unique_ptr<Type> (ASTLoweringType::translate (stmt.get_type ()));
+
+  tl::optional<std::unique_ptr<HIR::Expr>> init_expression = tl::nullopt;
+
+  if (stmt.has_init_expr ())
+    init_expression = std::unique_ptr<HIR::Expr> (
+      ASTLoweringExpr::translate (stmt.get_init_expr ()));
 
   auto crate_num = mappings.get_current_crate ();
   Analysis::NodeMapping mapping (crate_num, stmt.get_node_id (),