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       1              : // Copyright (C) 2020-2026 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_BIR_VISITOR_H
      20              : #define RUST_BIR_VISITOR_H
      21              : 
      22              : namespace Rust {
      23              : namespace BIR {
      24              : 
      25              : class Statement;
      26              : class InitializerExpr;
      27              : template <unsigned N> class Operator;
      28              : class Assignment;
      29              : class BorrowExpr;
      30              : class CallExpr;
      31              : 
      32           36 : class Visitor
      33              : {
      34              : public:
      35              :   virtual void visit (const Statement &stmt) = 0;
      36              :   virtual void visit (const InitializerExpr &expr) = 0;
      37              :   virtual void visit (const Operator<1> &expr) = 0;
      38              :   virtual void visit (const Operator<2> &expr) = 0;
      39              :   virtual void visit (const BorrowExpr &expr) = 0;
      40              :   virtual void visit (const Assignment &expr) = 0;
      41              :   virtual void visit (const CallExpr &expr) = 0;
      42              : };
      43              : 
      44          185 : class Visitable
      45              : {
      46              : public:
      47              :   virtual void accept_vis (Visitor &visitor) = 0;
      48              : };
      49              : 
      50              : template <typename BASE, typename T> class VisitableImpl : public BASE
      51              : {
      52              : public:
      53              :   template <typename... Args>
      54          185 :   explicit VisitableImpl (Args &&...args) : BASE (std::forward<Args> (args)...)
      55              :   {}
      56              : 
      57          185 :   void accept_vis (Visitor &visitor) override
      58              :   {
      59          185 :     visitor.visit (static_cast<T &> (*this));
      60          185 :   }
      61              : };
      62              : 
      63              : } // namespace BIR
      64              : } // namespace Rust
      65              : 
      66              : #endif // RUST_BIR_VISITOR_H