tools/gn/token.cc

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "tools/gn/token.h"
   6
   7 #include "base/logging.h"
   8
   9 namespace {
  10
  11 std::string UnescapeString(const base::StringPiece& input) {
  12   std::string result;
  13   result.reserve(input.size());
  14
  15   for (size_t i = 0; i < input.size(); i++) {
  16     if (input[i] == '\\') {
  17       DCHECK(i < input.size() - 1);  // Last char shouldn't be a backslash or
  18                                      // it would have escaped the terminator.
  19       i++;  // Skip backslash, next char is a literal.
  20     }
  21     result.push_back(input[i]);
  22   }
  23   return result;
  24 }
  25
  26 }  // namespace
  27
  28 Token::Token() : type_(INVALID), value_() {
  29 }
  30
  31 Token::Token(const Location& location,
  32              Type t,
  33              const base::StringPiece& v)
  34     : type_(t),
  35       value_(v),
  36       location_(location) {
  37 }
  38
  39 bool Token::IsIdentifierEqualTo(const char* v) const {
  40   return type_ == IDENTIFIER && value_ == v;
  41 }
  42
  43 bool Token::IsStringEqualTo(const char* v) const {
  44   return type_ == STRING && value_ == v;
  45 }
  46
  47 std::string Token::StringValue() const {
  48   DCHECK(type() == STRING);
  49
  50   // Trim off the string terminators at the end.
  51   return UnescapeString(value_.substr(1, value_.size() - 2));
  52 }