gcc/edit-context.h

   1 /* Determining the results of applying fix-it hints.
   2    Copyright (C) 2016-2023 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef GCC_EDIT_CONTEXT_H
  21 #define GCC_EDIT_CONTEXT_H
  22
  23 #include "typed-splay-tree.h"
  24
  25 class fixit_hint;
  26 class edit_context;
  27 class edited_file;
  28
  29 /* A set of changes to the source code.
  30
  31    The changes are "atomic" - if any changes can't be applied,
  32    none of them can be (tracked by the m_valid flag).
  33    Similarly, attempts to add the changes from a rich_location flagged
  34    as containing invalid changes mean that the whole of the edit_context
  35    is flagged as invalid.
  36
  37    A complication here is that fix-its are expressed relative to coordinates
  38    in the files when they were parsed, before any changes have been made, and
  39    so if there's more that one fix-it to be applied, we have to adjust
  40    later fix-its to allow for the changes made by earlier ones.  This
  41    is done by the various "get_effective_column" methods.  */
  42
  43 class edit_context
  44 {
  45  public:
  46   edit_context (file_cache &);
  47
  48   bool valid_p () const { return m_valid; }
  49
  50   void add_fixits (rich_location *richloc);
  51
  52   char *get_content (const char *filename);
  53
  54   int get_effective_column (const char *filename, int line, int column);
  55
  56   char *generate_diff (bool show_filenames);
  57   void print_diff (pretty_printer *pp, bool show_filenames);
  58
  59   file_cache &get_file_cache () const { return m_file_cache; }
  60
  61  private:
  62   bool apply_fixit (const fixit_hint *hint);
  63   edited_file *get_file (const char *filename);
  64   edited_file &get_or_insert_file (const char *filename);
  65
  66   file_cache &m_file_cache;
  67   bool m_valid;
  68   typed_splay_tree<const char *, edited_file *> m_files;
  69 };
  70
  71 #endif /* GCC_EDIT_CONTEXT_H.  */