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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_PARTIAL_EQ_H
#define RUST_DERIVE_PARTIAL_EQ_H
#include "rust-derive.h"
#include "rust-path.h"
namespace Rust {
namespace AST {
class DerivePartialEq : DeriveVisitor
{
public:
DerivePartialEq (location_t loc);
std::vector<std::unique_ptr<AST::Item>> go (Item &item);
private:
std::vector<std::unique_ptr<Item>> expanded;
/**
* Generate both an implementation of `PartialEq` and `StructuralPartialEq`
* for the given type
*/
std::vector<std::unique_ptr<Item>> partialeq_impls (
std::unique_ptr<AssociatedItem> &&eq_fn, std::string name,
const std::vector<std::unique_ptr<GenericParam>> &type_generics);
std::unique_ptr<AssociatedItem> eq_fn (std::unique_ptr<Expr> &&cmp_expression,
std::string type_name);
/**
* A pair of two expressions from each instance being compared. E.g. this
* could be `self.0` and `other.0`, or `self.field` and `other.field`
*/
struct SelfOther
{
std::unique_ptr<Expr> self_expr;
std::unique_ptr<Expr> other_expr;
};
SelfOther tuple_indexes (int idx);
SelfOther field_acccesses (const std::string &field_name);
/**
* Build a suite of equality arithmetic expressions chained together by a
* boolean AND operator
*/
std::unique_ptr<Expr>
build_eq_expression (std::vector<SelfOther> &&field_expressions);
MatchCase match_enum_identifier (PathInExpression variant_path,
const std::unique_ptr<EnumItem> &variant);
MatchCase match_enum_tuple (PathInExpression variant_path,
const EnumItemTuple &variant);
MatchCase match_enum_struct (PathInExpression variant_path,
const EnumItemStruct &variant);
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_PARTIAL_EQ_H
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