tmp/tmpnno8b_ht/{from.md → to.md}
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#### Class template `not_equal_to` <a id="comparisons.not.equal.to">[[comparisons.not.equal.to]]</a>
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``` cpp
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template<class T = void> struct not_equal_to {
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constexpr bool operator()(const T& x, const T& y) const;
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};
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```
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``` cpp
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constexpr bool operator()(const T& x, const T& y) const;
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```
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*Returns:* `x != y`.
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``` cpp
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template<> struct not_equal_to<void> {
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template<class T, class U> constexpr auto operator()(T&& t, U&& u) const
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-> decltype(std::forward<T>(t) != std::forward<U>(u));
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using is_transparent = unspecified;
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};
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```
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``` cpp
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template<class T, class U> constexpr auto operator()(T&& t, U&& u) const
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-> decltype(std::forward<T>(t) != std::forward<U>(u));
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```
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*Returns:* `std::forward<T>(t) != std::forward<U>(u)`.
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