/usr/include/cutl/xml/value-traits.hxx is in libcutl-dev 1.8.1+ds1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53  | // file      : cutl/xml/value-traits.hxx
// copyright : Copyright (c) 2009-2013 Code Synthesis Tools CC
// license   : MIT; see accompanying LICENSE file
#ifndef CUTL_XML_VALUE_TRAITS_HXX
#define CUTL_XML_VALUE_TRAITS_HXX
#include <string>
#include <cstddef> // std::size_t
#include <cutl/details/export.hxx>
namespace cutl
{
  namespace xml
  {
    class parser;
    class serializer;
    template <typename T>
    struct default_value_traits
    {
      static T
      parse (std::string, const parser&);
      static std::string
      serialize (const T&, const serializer&);
    };
    template <>
    struct LIBCUTL_EXPORT default_value_traits<bool>
    {
      static bool
      parse (std::string, const parser&);
      static std::string
      serialize (bool v, const serializer&)
      {
        return v ? "true" : "false";
      }
    };
    template <typename T>
    struct value_traits: default_value_traits<T> {};
    template <typename T, std::size_t N>
    struct value_traits<T[N]>: default_value_traits<const T*> {};
  }
}
#include <cutl/xml/value-traits.txx>
#endif // CUTL_XML_VALUE_TRAITS_HXX
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