A C++ wrapper for the basic C datatypes defined by the pEpEngine.
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// This file is under GNU General Public License 3.0
// see LICENSE.txt
#ifndef PEP_DATATYPES_STRING_VIEW_HH
#define PEP_DATATYPES_STRING_VIEW_HH
#if (__cplusplus >= 201606) // std::string_view is C++17.
# include <string_view>
namespace pEp
{
template<class CharT>
using basic_string_view = std::basic_string_view<CharT>;
typedef std::string_view string_view;
typedef std::u16string_view u16string_view;
}
#else // in C++11 / C++14 use boost::string_view instead.
# include <boost/utility/string_view.hpp>
namespace pEp
{
template<class CharT>
using basic_string_view = boost::basic_string_view<CharT>;
typedef boost::string_view string_view;
typedef boost::u16string_view u16string_view;
// boost::string_view does not provide these operations, neither by boost nor by the stdlib. :-(
template<class CharT>
inline
std::basic_string<CharT>& operator+=(std::basic_string<CharT>& s, const basic_string_view<CharT> v)
{
s.append(v.data(), v.size());
return s;
}
template<class CharT>
inline
std::basic_string<CharT> operator+(std::basic_string<CharT> s, const basic_string_view<CharT> v)
{
return s += v;
}
// using ::std::operator+=;
// using ::boost::operator+=;
} // end of namespace pEp
#endif // C++17 switch
namespace pEp
{
constexpr
string_view operator""_sv(const char* s, size_t sz) noexcept
{
return string_view(s,sz);
}
}
#endif // PEP_DATATYPES_STRING_VIEW_HH