ceph/src/boost/tools/quickbook/src/string_view.hpp

   1 /*=============================================================================
   2     Copyright (c) 2017 Daniel James
   3     http://spirit.sourceforge.net/
   4
   5     Use, modification and distribution is subject to the Boost Software
   6     License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   7     http://www.boost.org/LICENSE_1_0.txt)
   8 =============================================================================*/
   9 #if !defined(BOOST_SPIRIT_QUICKBOOK_STRING_VIEW_HPP)
  10 #define BOOST_SPIRIT_QUICKBOOK_STRING_VIEW_HPP
  11
  12 #include <boost/functional/hash/hash_fwd.hpp>
  13 #include <boost/utility/string_view.hpp>
  14
  15 namespace quickbook
  16 {
  17     // boost::string_view now can't be constructed from an rvalue std::string,
  18     // which is something that quickbook does in several places, so this wraps
  19     // it to allow that.
  20
  21     struct string_view : boost::string_view
  22     {
  23         typedef boost::string_view base;
  24
  25         string_view() : base() {}
  26         string_view(string_view const& x) : base(x) {}
  27         string_view(std::string const& x) : base(x) {}
  28         string_view(const char* x) : base(x) {}
  29         string_view(const char* x, base::size_type len) : base(x, len) {}
  30
  31         std::string to_s() const { return std::string(begin(), end()); }
  32     };
  33
  34     typedef quickbook::string_view::const_iterator string_iterator;
  35
  36     inline std::size_t hash_value(string_view const& x)
  37     {
  38         return boost::hash_range(x.begin(), x.end());
  39     }
  40
  41     inline std::string& operator+=(std::string& x, string_view const& y)
  42     {
  43         return x.append(y.begin(), y.end());
  44     }
  45 }
  46
  47 #endif