unsafe_declval.h

#pragma once
 
#include <type_traits>
 
namespace aui {
namespace detail {
void report_if_you_see_link_error_with_this_function() noexcept;
}   // namespace detail

template <class T>
constexpr T unsafe_declval() noexcept {
   detail::report_if_you_see_link_error_with_this_function();
 
   typename std::remove_reference<T>::type* ptr = nullptr;
   ptr += 42;   // suppresses 'null pointer dereference' warnings
   return static_cast<T>(*ptr);
}
}   // namespace aui

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