/* Find near-matches for identifiers.
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Copyright (C) 2015-2017 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_SPELLCHECK_TREE_H
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#define GCC_SPELLCHECK_TREE_H
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#include "spellcheck.h"
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/* spellcheck-tree.c */
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extern edit_distance_t
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levenshtein_distance (tree ident_s, tree ident_t);
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extern tree
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find_closest_identifier (tree target, const auto_vec<tree> *candidates);
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/* Specialization of edit_distance_traits for identifiers. */
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template <>
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struct edit_distance_traits<tree>
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{
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static size_t get_length (tree id)
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{
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gcc_assert (TREE_CODE (id) == IDENTIFIER_NODE);
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return IDENTIFIER_LENGTH (id);
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}
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static const char *get_string (tree id)
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{
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gcc_assert (TREE_CODE (id) == IDENTIFIER_NODE);
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return IDENTIFIER_POINTER (id);
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}
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};
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/* Specialization of edit_distance_traits for preprocessor macros. */
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template <>
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struct edit_distance_traits<cpp_hashnode *>
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{
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static size_t get_length (cpp_hashnode *hashnode)
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{
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return hashnode->ident.len;
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}
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static const char *get_string (cpp_hashnode *hashnode)
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{
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return (const char *)hashnode->ident.str;
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}
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};
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/* Specialization of best_match<> for finding the closest preprocessor
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macro to a given identifier. */
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class best_macro_match : public best_match<tree, cpp_hashnode *>
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{
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public:
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best_macro_match (tree goal, edit_distance_t best_distance_so_far,
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cpp_reader *reader);
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};
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#endif /* GCC_SPELLCHECK_TREE_H */
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