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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef TOOLS_GN_STRING_UTILS_H_
#define TOOLS_GN_STRING_UTILS_H_
#include <vector>
#include "base/strings/string_piece.h"
class Err;
class Scope;
class Token;
class Value;
inline std::string operator+(const std::string& a, const base::StringPiece& b) {
std::string ret;
ret.reserve(a.size() + b.size());
ret.assign(a);
ret.append(b.data(), b.size());
return ret;
}
inline std::string operator+(const base::StringPiece& a, const std::string& b) {
std::string ret;
ret.reserve(a.size() + b.size());
ret.assign(a.data(), a.size());
ret.append(b);
return ret;
}
// Unescapes and expands variables in the given literal, writing the result
// to the given value. On error, sets |err| and returns false.
bool ExpandStringLiteral(Scope* scope,
const Token& literal,
Value* result,
Err* err);
// Returns the minimum number of inserts, deleted, and replacements of
// characters needed to transform s1 to s2, or max_edit_distance + 1 if
// transforming s1 into s2 isn't possible in at most max_edit_distance steps.
size_t EditDistance(const base::StringPiece& s1,
const base::StringPiece& s2,
size_t max_edit_distance);
// Given a string |text| and a vector of correctly-spelled strings |words|,
// returns the first string in |words| closest to |text|, or an empty
// StringPiece if none of the strings in |words| is close.
base::StringPiece SpellcheckString(const base::StringPiece& text,
const std::vector<base::StringPiece>& words);
#endif // TOOLS_GN_STRING_UTILS_H_
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