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       1              : // Copyright (C) 2025-2026 Free Software Foundation, Inc.
       2              : 
       3              : // This file is part of GCC.
       4              : 
       5              : // GCC is free software; you can redistribute it and/or modify it under
       6              : // the terms of the GNU General Public License as published by the Free
       7              : // Software Foundation; either version 3, or (at your option) any later
       8              : // version.
       9              : 
      10              : // GCC is distributed in the hope that it will be useful, but WITHOUT ANY
      11              : // WARRANTY; without even the implied warranty of MERCHANTABILITY or
      12              : // FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      13              : // for more details.
      14              : 
      15              : // You should have received a copy of the GNU General Public License
      16              : // along with GCC; see the file COPYING3.  If not see
      17              : // <http://www.gnu.org/licenses/>.
      18              : 
      19              : #ifndef RUST_DERIVE_HASH_H
      20              : #define RUST_DERIVE_HASH_H
      21              : 
      22              : #include "rust-derive.h"
      23              : 
      24              : namespace Rust {
      25              : namespace AST {
      26              : 
      27            3 : class DeriveHash : DeriveVisitor
      28              : {
      29              : public:
      30              :   DeriveHash (location_t loc);
      31              : 
      32              :   std::unique_ptr<Item> go (Item &item);
      33              : 
      34              : private:
      35              :   std::unique_ptr<Item> expanded;
      36              : 
      37              :   constexpr static const char *state = "#state";
      38              :   constexpr static const char *state_type = "#__H";
      39              :   constexpr static const char *discr = "#discr";
      40              : 
      41              :   std::unique_ptr<Expr> hash_call (std::unique_ptr<Expr> &&value);
      42              :   std::unique_ptr<AssociatedItem> hash_fn (std::unique_ptr<BlockExpr> &&block);
      43              :   std::unique_ptr<Item>
      44              :   hash_impl (std::unique_ptr<AssociatedItem> &&hash_fn, std::string name,
      45              :              const std::vector<std::unique_ptr<GenericParam>> &type_generics);
      46              : 
      47              :   MatchCase match_enum_tuple (PathInExpression variant_path,
      48              :                               const EnumItemTuple &variant);
      49              :   MatchCase match_enum_struct (PathInExpression variant_path,
      50              :                                const EnumItemStruct &variant);
      51              : 
      52              :   virtual void visit_struct (StructStruct &item) override;
      53              :   virtual void visit_tuple (TupleStruct &item) override;
      54              :   virtual void visit_enum (Enum &item) override;
      55              :   virtual void visit_union (Union &item) override;
      56              : };
      57              : 
      58              : } // namespace AST
      59              : } // namespace Rust
      60              : 
      61              : #endif // ! RUST_DERIVE_HASH_H