Binding.h

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#ifndef INCLUDE_TEMPLE_BINDING_H
#define INCLUDE_TEMPLE_BINDING_H

#include <utility>

namespace Scine {
namespace Molassembler {
namespace Temple {

template<typename T>
struct Binding {
  /* Since T is in a type-deducing context, T&& is a 'universal reference',
   * and reference collapsing is applied!
   */
  using type = std::conditional_t<
    std::is_rvalue_reference<T&&>::value || std::is_fundamental<std::decay_t<T>>::value,
    std::decay_t<T>,
    const T&
  >;

  // Now the constructor can apply the same logic unconditionally
  constexpr explicit Binding(T&& t) noexcept : value(t) {}
  virtual ~Binding() = default;

  type value;
};

} // namespace Temple
} // namespace Molassembler
} // namespace Scine

#endif