Line data    Source code

       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_MACRO_INVOC_LEXER_H
      20              : #define RUST_MACRO_INVOC_LEXER_H
      21              : 
      22              : #include "rust-ast.h"
      23              : 
      24              : namespace Rust {
      25              : 
      26        24363 : class MacroInvocLexer
      27              : {
      28              : public:
      29        17813 :   MacroInvocLexer (std::vector<const_TokenPtr> stream)
      30        17813 :     : offs (0), token_stream (std::move (stream))
      31              :   {}
      32              : 
      33         6550 :   MacroInvocLexer (const std::vector<std::unique_ptr<AST::Token>> &stream)
      34         6550 :     : offs (0)
      35              :   {
      36         6550 :     token_stream.reserve (stream.size ());
      37       167789 :     for (auto &tk : stream)
      38       322478 :       token_stream.push_back (tk->get_tok_ptr ());
      39         6550 :   }
      40              : 
      41              :   // Advances current token to n + 1 tokens ahead of current position.
      42         6748 :   void skip_token (int n) { offs += (n + 1); }
      43              : 
      44              :   // Skips the current token.
      45       207279 :   void skip_token () { skip_token (0); }
      46              : 
      47              :   // Returns token n tokens ahead of current position.
      48              :   const_TokenPtr peek_token (int n);
      49              : 
      50              :   // Peeks the current token.
      51       784301 :   const_TokenPtr peek_token () { return peek_token (0); }
      52              : 
      53              :   // Splits the current token into two. Intended for use with nested generics
      54              :   // closes (i.e. T<U<X>> where >> is wrongly lexed as one token). Note that
      55              :   // this will only work with "simple" tokens like punctuation.
      56              :   void split_current_token (TokenId new_left, TokenId new_right);
      57              : 
      58              :   void split_current_token (std::vector<TokenPtr> new_tokens);
      59              : 
      60              :   std::vector<std::unique_ptr<AST::Token>>
      61              :   get_token_slice (size_t start_idx, size_t end_idx) const;
      62              : 
      63            0 :   std::string get_filename () const
      64              :   {
      65              :     // FIXME
      66            0 :     rust_unreachable ();
      67              :     return "FIXME";
      68              :   }
      69              : 
      70        25607 :   size_t get_offs () const { return offs; }
      71              : 
      72              : protected:
      73              :   size_t offs;
      74              :   std::vector<const_TokenPtr> token_stream;
      75              : };
      76              : 
      77              : } // namespace Rust
      78              : 
      79              : #endif // RUST_MACRO_INVOC_LEXER_H