iter_val_t.hpp

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//
// Created by cosge on 2024-01-13.
//
 
#ifndef VCCC_ITERATOR_ITER_VAL_T_HPP_
#define VCCC_ITERATOR_ITER_VAL_T_HPP_
 
#include "vccc/__iterator/iterator_traits/cxx20_iterator_traits.hpp"
#include "vccc/__type_traits/has_typename_value_type.hpp"
 
namespace vccc {
namespace detail {
 
template<typename I, bool = has_typename_value_type< cxx20_iterator_traits<I> >::value /* true */>
struct iter_val_impl {
  using type = typename cxx20_iterator_traits<I>::value_type;
};
template<typename I>
struct iter_val_impl<I, false> {};
 
} // namespace detail
 
 
template<typename T>
struct iter_val : detail::iter_val_impl<T> {};
 
template<typename T>
using iter_val_t = typename iter_val<T>::type;
 
 
} // namespace vccc
 
#endif // VCCC_ITERATOR_ITER_VAL_T_HPP_