reconstruct_vec: Allocate size when creating the vector

CohenArthur · CohenArthur · commit f0a82f178f7e · 2025-06-13T09:59:58.000+02:00
gcc/rust/ChangeLog:

	* ast/rust-ast.h (reconstruct_vec): Pre-allocate size of vector.
diff --git a/gcc/rust/ast/rust-ast.h b/gcc/rust/ast/rust-ast.h
@@ -106,7 +106,7 @@ template <typename T>
 std::vector<std::unique_ptr<T>>
 reconstruct_vec (const std::vector<std::unique_ptr<T>> &to_reconstruct)
 {
-  std::vector<std::unique_ptr<T>> reconstructed;
+  std::vector<std::unique_ptr<T>> reconstructed (to_reconstruct.size ());
 
   for (const auto &elt : to_reconstruct)
     reconstructed.emplace_back (std::unique_ptr<T> (elt->reconstruct_impl ()));

Original file line number	Diff line number	Diff line change
`@@ -106,7 +106,7 @@ template <typename T>`
`106`	`106`	`std::vector<std::unique_ptr<T>>`
`107`	`107`	`reconstruct_vec (const std::vector<std::unique_ptr<T>> &to_reconstruct)`
`108`	`108`	`{`
`109`		`- std::vector<std::unique_ptr<T>> reconstructed;`
	`109`	`+ std::vector<std::unique_ptr<T>> reconstructed (to_reconstruct.size ());`
`110`	`110`
`111`	`111`	`for (const auto &elt : to_reconstruct)`
`112`	`112`	`reconstructed.emplace_back (std::unique_ptr<T> (elt->reconstruct_impl ()));`