namespace std {
template <class F, class... Args>
invoke_result_t<F, Args...> invoke(F&& f, Args&&... args)
noexcept(is_nothrow_invocable_v<F, Args...>);
template <class T> class reference_wrapper;
template <class T> reference_wrapper<T> ref(T&) noexcept;
template <class T> reference_wrapper<const T> cref(const T&) noexcept;
template <class T> void ref(const T&&) = delete;
template <class T> void cref(const T&&) = delete;
template <class T> reference_wrapper<T> ref(reference_wrapper<T>) noexcept;
template <class T> reference_wrapper<const T> cref(reference_wrapper<T>) noexcept;
template <class T = void> struct plus;
template <class T = void> struct minus;
template <class T = void> struct multiplies;
template <class T = void> struct divides;
template <class T = void> struct modulus;
template <class T = void> struct negate;
template <> struct plus<void>;
template <> struct minus<void>;
template <> struct multiplies<void>;
template <> struct divides<void>;
template <> struct modulus<void>;
template <> struct negate<void>;
template <class T = void> struct equal_to;
template <class T = void> struct not_equal_to;
template <class T = void> struct greater;
template <class T = void> struct less;
template <class T = void> struct greater_equal;
template <class T = void> struct less_equal;
template <> struct equal_to<void>;
template <> struct not_equal_to<void>;
template <> struct greater<void>;
template <> struct less<void>;
template <> struct greater_equal<void>;
template <> struct less_equal<void>;
template <class T = void> struct logical_and;
template <class T = void> struct logical_or;
template <class T = void> struct logical_not;
template <> struct logical_and<void>;
template <> struct logical_or<void>;
template <> struct logical_not<void>;
template <class T = void> struct bit_and;
template <class T = void> struct bit_or;
template <class T = void> struct bit_xor;
template <class T = void> struct bit_not;
template <> struct bit_and<void>;
template <> struct bit_or<void>;
template <> struct bit_xor<void>;
template <> struct bit_not<void>;
template <class F>
unspecified not_fn(F&& f);
template<class T> struct is_bind_expression;
template<class T> struct is_placeholder;
template<class F, class... BoundArgs>
unspecified bind(F&&, BoundArgs&&...);
template<class R, class F, class... BoundArgs>
unspecified bind(F&&, BoundArgs&&...);
namespace placeholders {
see below _1;
see below _2;
.
.
.
see below _M;
}
template<class R, class T>
unspecified mem_fn(R T::*) noexcept;
class bad_function_call;
template<class> class function; template<class R, class... ArgTypes> class function<R(ArgTypes...)>;
template<class R, class... ArgTypes>
void swap(function<R(ArgTypes...)>&, function<R(ArgTypes...)>&) noexcept;
template<class R, class... ArgTypes>
bool operator==(const function<R(ArgTypes...)>&, nullptr_t) noexcept;
template<class R, class... ArgTypes>
bool operator==(nullptr_t, const function<R(ArgTypes...)>&) noexcept;
template<class R, class... ArgTypes>
bool operator!=(const function<R(ArgTypes...)>&, nullptr_t) noexcept;
template<class R, class... ArgTypes>
bool operator!=(nullptr_t, const function<R(ArgTypes...)>&) noexcept;
template<class ForwardIterator, class BinaryPredicate = equal_to<>>
class default_searcher;
template<class RandomAccessIterator,
class Hash = hash<typename iterator_traits<RandomAccessIterator>::value_type>,
class BinaryPredicate = equal_to<>>
class boyer_moore_searcher;
template<class RandomAccessIterator,
class Hash = hash<typename iterator_traits<RandomAccessIterator>::value_type>,
class BinaryPredicate = equal_to<>>
class boyer_moore_horspool_searcher;
template <class T>
struct hash;
template <class T>
inline constexpr bool is_bind_expression_v = is_bind_expression<T>::value;
template <class T>
inline constexpr int is_placeholder_v = is_placeholder<T>::value;
}
[ Example: If a C++ program wants to have a by-element addition of two vectors a and b containing double and put the result into a, it can do:
transform(a.begin(), a.end(), b.begin(), a.begin(), plus<double>());
— end example ]
[ Example: To negate every element of a:
transform(a.begin(), a.end(), a.begin(), negate<double>());
— end example ]
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