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_AST_LOWER_EXTERN_ITEM
      20  #define RUST_AST_LOWER_EXTERN_ITEM
      21  
      22  #include "rust-ast-lower-base.h"
      23  #include "rust-ast-lower-type.h"
      24  #include "rust-ast-lower.h"
      25  
      26  namespace Rust {
      27  namespace HIR {
      28  
      29  class ASTLoweringExternItem : public ASTLoweringBase
      30  {
      31    using Rust::HIR::ASTLoweringBase::visit;
      32  
      33  public:
      34    static HIR::ExternalItem *translate (AST::ExternalItem *item,
      35  				       HirId parent_hirid)
      36    {
      37      ASTLoweringExternItem resolver;
      38      item->accept_vis (resolver);
      39  
      40      rust_assert (resolver.translated != nullptr);
      41      resolver.mappings->insert_hir_extern_item (resolver.translated,
      42  					       parent_hirid);
      43      resolver.mappings->insert_location (
      44        resolver.translated->get_mappings ().get_hirid (),
      45        resolver.translated->get_locus ());
      46  
      47      return resolver.translated;
      48    }
      49  
      50    void visit (AST::ExternalStaticItem &item) override
      51    {
      52      HIR::Visibility vis = translate_visibility (item.get_visibility ());
      53      HIR::Type *static_type
      54        = ASTLoweringType::translate (item.get_type ().get ());
      55  
      56      auto crate_num = mappings->get_current_crate ();
      57      Analysis::NodeMapping mapping (crate_num, item.get_node_id (),
      58  				   mappings->get_next_hir_id (crate_num),
      59  				   mappings->get_next_localdef_id (crate_num));
      60  
      61      translated = new HIR::ExternalStaticItem (
      62        mapping, item.get_identifier (), std::unique_ptr<HIR::Type> (static_type),
      63        item.is_mut () ? Mutability::Mut : Mutability::Imm, std::move (vis),
      64        item.get_outer_attrs (), item.get_locus ());
      65    }
      66  
      67    void visit (AST::ExternalFunctionItem &function) override
      68    {
      69      std::vector<std::unique_ptr<HIR::WhereClauseItem> > where_clause_items;
      70      HIR::WhereClause where_clause (std::move (where_clause_items));
      71      HIR::Visibility vis = translate_visibility (function.get_visibility ());
      72  
      73      std::vector<std::unique_ptr<HIR::GenericParam> > generic_params;
      74      if (function.has_generics ())
      75        generic_params = lower_generic_params (function.get_generic_params ());
      76  
      77      HIR::Type *return_type
      78        = function.has_return_type ()
      79  	  ? ASTLoweringType::translate (function.get_return_type ().get ())
      80  	  : nullptr;
      81  
      82      std::vector<HIR::NamedFunctionParam> function_params;
      83      for (auto &param : function.get_function_params ())
      84        {
      85  	HIR::Type *param_type
      86  	  = ASTLoweringType::translate (param.get_type ().get ());
      87  	Identifier param_name = param.get_name ();
      88  
      89  	auto crate_num = mappings->get_current_crate ();
      90  	Analysis::NodeMapping mapping (crate_num, param.get_node_id (),
      91  				       mappings->get_next_hir_id (crate_num),
      92  				       mappings->get_next_localdef_id (
      93  					 crate_num));
      94  
      95  	function_params.push_back (
      96  	  HIR::NamedFunctionParam (mapping, param_name,
      97  				   std::unique_ptr<HIR::Type> (param_type)));
      98        }
      99  
     100      auto crate_num = mappings->get_current_crate ();
     101      Analysis::NodeMapping mapping (crate_num, function.get_node_id (),
     102  				   mappings->get_next_hir_id (crate_num),
     103  				   mappings->get_next_localdef_id (crate_num));
     104  
     105      translated = new HIR::ExternalFunctionItem (
     106        mapping, function.get_identifier (), std::move (generic_params),
     107        std::unique_ptr<HIR::Type> (return_type), std::move (where_clause),
     108        std::move (function_params), function.is_variadic (), std::move (vis),
     109        function.get_outer_attrs (), function.get_locus ());
     110    }
     111  
     112  private:
     113    ASTLoweringExternItem () : translated (nullptr) {}
     114  
     115    HIR::ExternalItem *translated;
     116  };
     117  
     118  } // namespace HIR
     119  } // namespace Rust
     120  
     121  #endif // RUST_AST_LOWER_ITEM