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// Copyright (C) 2025 Free Software Foundation, Inc.
// This file is part of GCC.
// GCC is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 3, or (at your option) any later
// version.
// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
// You should have received a copy of the GNU General Public License
// along with GCC; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
#ifndef RUST_DERIVE_EQ_H
#define RUST_DERIVE_EQ_H
#include "rust-derive.h"
namespace Rust {
namespace AST {
// FIXME: Need to figure out structuraleq marker trait
class DeriveEq : DeriveVisitor
{
public:
DeriveEq (location_t loc);
std::vector<std::unique_ptr<AST::Item>> go (Item &item);
private:
std::vector<std::unique_ptr<Item>> expanded;
/**
* Create the actual `assert_receiver_is_total_eq` function of the
* implementation, which asserts that every type contained within our targeted
* type also implements `Eq`.
*/
std::unique_ptr<AssociatedItem>
assert_receiver_is_total_eq_fn (std::vector<std::unique_ptr<Type>> &&types);
/**
* Create the Eq trait implementation for a type
*
* impl Eq for <type> {
* <assert_receiver_is_total_eq>
* }
*
*/
std::vector<std::unique_ptr<Item>>
eq_impls (std::unique_ptr<AssociatedItem> &&fn, std::string name,
const std::vector<std::unique_ptr<GenericParam>> &type_generics);
/**
* Generate the following structure definition
*
* struct AssertParamIsEq<T: Eq + ?Sized> { _t: PhantomData<T> }
*/
std::unique_ptr<Stmt> assert_param_is_eq ();
/**
* Generate a let statement to assert a type implements `Eq`
*
* let _: AssertParamIsEq<type>;
*/
std::unique_ptr<Stmt> assert_type_is_eq (std::unique_ptr<Type> &&type);
virtual void visit_struct (StructStruct &item);
virtual void visit_tuple (TupleStruct &item);
virtual void visit_enum (Enum &item);
virtual void visit_union (Union &item);
};
} // namespace AST
} // namespace Rust
#endif // ! RUST_DERIVE_EQ_H
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