Program Listing for File forward_detail.h

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#pragma once

#include <type_traits>

#ifndef DOXYGEN_SHOULD_SKIP_THIS
namespace uconfig {

// Forward-declared operator==.
template <typename V, typename U, std::enable_if_t<!detail::is_base_of_template<U, Variable>::value, bool> = true>
bool operator==(const U& lhs, const Variable<V>& rhs);
template <typename V, typename U, std::enable_if_t<!detail::is_base_of_template<U, Variable>::value, bool> = true>
bool operator==(const Variable<V>& lhs, const U& rhs);

// Forward-declared operator!=.
template <typename V, typename U, std::enable_if_t<!detail::is_base_of_template<U, Variable>::value, bool> = true>
bool operator!=(const U& lhs, const Variable<V>& rhs);
template <typename V, typename U, std::enable_if_t<!detail::is_base_of_template<U, Variable>::value, bool> = true>
bool operator!=(const Variable<V>& lhs, const U& rhs);

} // namespace uconfig
#endif /* DOXYGEN_SHOULD_SKIP_THIS */