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       1                 :             : // Copyright (C) 2024 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_COLLECT_LANG_ITEMS_H
      20                 :             : #define RUST_COLLECT_LANG_ITEMS_H
      21                 :             : 
      22                 :             : #include "rust-ast-visitor.h"
      23                 :             : #include "rust-ast.h"
      24                 :             : #include "rust-hir-map.h"
      25                 :             : #include "rust-item.h"
      26                 :             : 
      27                 :             : namespace Rust {
      28                 :             : namespace AST {
      29                 :             : 
      30                 :             : // This class collects lang items ahead of lowering, as they are now needed for
      31                 :             : // some parts of name resolution
      32                 :             : class CollectLangItems : public DefaultASTVisitor
      33                 :             : {
      34                 :             : public:
      35                 :        4939 :   CollectLangItems () : mappings (Analysis::Mappings::get ()){};
      36                 :             : 
      37                 :        4939 :   void go (AST::Crate &crate) { DefaultASTVisitor::visit (crate); }
      38                 :             : 
      39                 :             :   Analysis::Mappings &mappings;
      40                 :             : 
      41                 :             :   // We must implement visitors for all constructs that could be lang items.
      42                 :             :   // Lang items can be traits, but also enums, and even enum variants.
      43                 :             :   //
      44                 :             :   // https://github.com/rust-lang/rust/blob/master/compiler/rustc_hir/src/lang_items.rs
      45                 :             : 
      46                 :             :   using DefaultASTVisitor::visit;
      47                 :             : 
      48                 :             :   void visit (AST::Trait &item) override;
      49                 :             :   void visit (AST::TraitItemType &item) override;
      50                 :             :   void visit (AST::Function &item) override;
      51                 :             :   void visit (AST::StructStruct &item) override;
      52                 :             :   void visit (AST::EnumItem &item) override;
      53                 :             : 
      54                 :             : private:
      55                 :             :   template <typename T> void maybe_add_lang_item (const T &item);
      56                 :             : };
      57                 :             : 
      58                 :             : } // namespace AST
      59                 :             : } // namespace Rust
      60                 :             : 
      61                 :             : #endif // ! RUST_COLLECT_LANG_ITEMS_H