sc_string_view.h

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/*****************************************************************************

  sc_string_view.h -- Non-owning, constant reference to a character string
*/
#ifndef SYSC_UTILS_STRING_VIEW_H_INCLUDED_
#define SYSC_UTILS_STRING_VIEW_H_INCLUDED_

#include <sysc/kernel/sc_cmnhdr.h>

#if SC_CPLUSPLUS >= 201402L && defined(__has_include)
#  if SC_CPLUSPLUS > 201402L && __has_include(<string_view>) /* since C++17 */
#    define SC_STRING_VIEW_NS_ std
#    include <string_view>
   /*  available in Library Fundamentals, ISO/IEC TS 19568:2015 */
#  elif __has_include(<experimental/string_view>)
#    define SC_STRING_VIEW_NS_ std::experimental
#    include <experimental/string_view>
#  endif
#else
// TODO: other ways to detect availability of std::(experimental::)string_view?
#endif

#ifndef SC_STRING_VIEW_NS_
// fallback to (mostly compatible) implementation from Boost
#  include <sysc/packages/boost/utility/string_view.hpp>
#  define SC_STRING_VIEW_NS_ sc_boost
#endif // Boost fallback

namespace sc_core {

typedef SC_STRING_VIEW_NS_::string_view sc_string_view;
// TODO: add ABI guard against inconsistent configurations

class sc_zstring_view : public sc_string_view
{
public:
  /* constexpr */ sc_zstring_view() /* noexcept */
    : sc_string_view() {}

  /* constexpr */ sc_zstring_view(const char* s) /* noexcept */
    : sc_string_view(s) {}

  sc_zstring_view(const std::string& s) /* noexcept */
    : sc_string_view(s) {}

  /* constexpr */ void swap(sc_zstring_view& s) /* noexcept */
    { sc_string_view::swap(s); }

  /* constexpr */ const char* c_str() const /* noexcept */
    { return data(); }

private:
  // Hide invariant-breaking function
  using sc_string_view::remove_suffix;
}; // class sc_zstring_view

} // namespace sc_core

#undef SC_STRING_VIEW_NS_
#endif // SYSC_UTILS_STRING_VIEW_H_INCLUDED_
// Taf!