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_TYTY_UTIL_H
      20  #define RUST_TYTY_UTIL_H
      21  
      22  #include "rust-hir-map.h"
      23  
      24  namespace Rust {
      25  namespace TyTy {
      26  
      27  class BaseType;
      28  
      29  // this is a placeholder for types that can change like inference variables
      30  class TyVar
      31  {
      32  public:
      33    explicit TyVar (HirId ref);
      34  
      35    HirId get_ref () const { return ref; }
      36  
      37    BaseType *get_tyty () const;
      38  
      39    TyVar clone () const;
      40  
      41    TyVar monomorphized_clone () const;
      42  
      43    static TyVar get_implicit_infer_var (Location locus);
      44  
      45    static TyVar subst_covariant_var (TyTy::BaseType *orig,
      46  				    TyTy::BaseType *subst);
      47  
      48  private:
      49    HirId ref;
      50  };
      51  
      52  class TyWithLocation
      53  {
      54  public:
      55    explicit TyWithLocation (BaseType *ty, Location locus);
      56    explicit TyWithLocation (BaseType *ty);
      57  
      58    BaseType *get_ty () const { return ty; }
      59    Location get_locus () const { return locus; }
      60  
      61  private:
      62    BaseType *ty;
      63    Location locus;
      64  };
      65  
      66  } // namespace TyTy
      67  } // namespace Rust
      68  
      69  #endif // RUST_TYTY_UTIL_H