[gcc/devel/rust/master] derive(Clone): Use lang item bounds on AssertParamIsCopy

[Thomas Schwinge]

https://gcc.gnu.org/g:1f39e0f2cbe23d46b805f976db0807e5aa27d362

commit 1f39e0f2cbe23d46b805f976db0807e5aa27d362
Author: Arthur Cohen <arthur.cohen@embecosm.com>
Date:   Mon Jan 20 11:36:53 2025 +0000

    derive(Clone): Use lang item bounds on AssertParamIsCopy
    
    gcc/rust/ChangeLog:
    
            * expand/rust-derive-clone.cc (DeriveClone::visit_union): Use lang items for Copy and
            Sized bounds.
    
    gcc/testsuite/ChangeLog:
    
            * rust/compile/derive_macro6.rs: Add lang item attribute to Copy trait.

Diff:
---
 gcc/rust/expand/rust-derive-clone.cc        | 11 +++++------
 gcc/testsuite/rust/compile/derive_macro6.rs |  2 +-
 2 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/gcc/rust/expand/rust-derive-clone.cc b/gcc/rust/expand/rust-derive-clone.cc
index 754d89cd84df..6ee83a72b531 100644
--- a/gcc/rust/expand/rust-derive-clone.cc
+++ b/gcc/rust/expand/rust-derive-clone.cc
@@ -422,17 +422,16 @@ DeriveClone::visit_union (Union &item)
   // FIXME: Should be $crate::core::clone::AssertParamIsCopy (or similar)
   // (Rust-GCC#3329)
 
-  auto copy_path = TypePath (vec (builder.type_path_segment ("Copy")), loc);
-  auto sized_path = TypePath (vec (builder.type_path_segment ("Sized")), loc);
+  auto copy_path = builder.type_path (LangItem::Kind::COPY);
+  auto sized_path = builder.type_path (LangItem::Kind::SIZED);
 
   auto copy_bound = std::unique_ptr<TypeParamBound> (
     new TraitBound (copy_path, item.get_locus ()));
   auto sized_bound = std::unique_ptr<TypeParamBound> (
-    new TraitBound (sized_path, item.get_locus (), false, true));
+    new TraitBound (sized_path, item.get_locus (), false,
+		    true /* opening_question_mark */));
 
-  auto bounds = std::vector<std::unique_ptr<TypeParamBound>> ();
-  bounds.emplace_back (std::move (copy_bound));
-  bounds.emplace_back (std::move (sized_bound));
+  auto bounds = vec (std::move (copy_bound), std::move (sized_bound));
 
   // struct AssertParamIsCopy<T: Copy + ?Sized> { _t: PhantomData<T> }
   auto assert_param_is_copy = "AssertParamIsCopy";
diff --git a/gcc/testsuite/rust/compile/derive_macro6.rs b/gcc/testsuite/rust/compile/derive_macro6.rs
index 35327c03b54c..412144d5917a 100644
--- a/gcc/testsuite/rust/compile/derive_macro6.rs
+++ b/gcc/testsuite/rust/compile/derive_macro6.rs
@@ -1,9 +1,9 @@
 #[lang = "sized"]
 pub trait Sized {}
 
+#[lang = "copy"]
 pub trait Copy {}
 
-
 #[lang = "clone"]
 pub trait Clone {
     fn clone(&self) -> Self;