gcc/rust/checks/errors/borrowck/rust-bir-visitor.h

   1 // Copyright (C) 2020-2023 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 Node;
  26 class InitializerExpr;
  27 template <unsigned N> class Operator;
  28 class Assignment;
  29 class BorrowExpr;
  30 class CallExpr;
  31
  32 class Visitor
  33 {
  34 public:
  35   virtual void visit (Node &node) = 0;
  36   virtual void visit (InitializerExpr &expr) = 0;
  37   virtual void visit (Operator<1> &expr) = 0;
  38   virtual void visit (Operator<2> &expr) = 0;
  39   virtual void visit (BorrowExpr &expr) = 0;
  40   virtual void visit (Assignment &expr) = 0;
  41   virtual void visit (CallExpr &expr) = 0;
  42 };
  43
  44 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   void accept_vis (Visitor &visitor) override
  54   {
  55     visitor.visit (static_cast<T &> (*this));
  56   }
  57 };
  58
  59 } // namespace BIR
  60 } // namespace Rust
  61
  62 #endif // RUST_BIR_VISITOR_H