1 files changed, 59 insertions, 0 deletions
diff --git a/gcc/opt-suggestions.h b/gcc/opt-suggestions.h
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+++ b/gcc/opt-suggestions.h
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+/* Provide suggestions to handle misspelled options, and implement the
+   --complete option for auto-completing options from a prefix.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#ifndef GCC_OPT_PROPOSER_H
+#define GCC_OPT_PROPOSER_H
+
+/* Option proposer is class used by driver in order to provide hints
+   for wrong options provided.  And it's used by --complete option that's
+   intended to be invoked by BASH in order to provide better option
+   completion support.  */
+
+class option_proposer
+{
+public:
+  /* Default constructor.  */
+  option_proposer (): m_option_suggestions (NULL)
+  {}
+
+  /* Default destructor.  */
+  ~option_proposer ();
+
+  /* Helper function for driver::handle_unrecognized_options.
+
+     Given an unrecognized option BAD_OPT (without the leading dash),
+     locate the closest reasonable matching option (again, without the
+     leading dash), or NULL.
+
+     The returned string is owned by the option_proposer instance.  */
+  const char *suggest_option (const char *bad_opt);
+
+private:
+  /* Helper function for option_proposer::suggest_option.  Populate
+     m_option_suggestions with candidate strings for misspelled options.
+     The strings will be freed by the option_proposer's dtor.  */
+  void build_option_suggestions ();
+
+private:
+  /* Cache with all suggestions.  */
+  auto_string_vec *m_option_suggestions;
+};
+
+#endif  /* GCC_OPT_PROPOSER_H */