// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP_FUNCTIONAL
#define _LIBCPP_FUNCTIONAL
/*
functional synopsis
namespace std
{
template <class Arg, class Result>
struct unary_function
{
typedef Arg argument_type;
typedef Result result_type;
};
template <class Arg1, class Arg2, class Result>
struct binary_function
{
typedef Arg1 first_argument_type;
typedef Arg2 second_argument_type;
typedef Result result_type;
};
template <class T>
class reference_wrapper
: public unary_function<T1, R> // if wrapping a unary functor
: public binary_function<T1, T2, R> // if wrapping a binary functor
{
public:
// types
typedef T type;
typedef see below result_type; // Not always defined
// construct/copy/destroy
template<class U>
constexpr reference_wrapper(U&&); // constexpr since C++20
constexpr reference_wrapper(const reference_wrapper<T>& x) noexcept; // constexpr since C++20
// assignment
constexpr reference_wrapper&
operator=(const reference_wrapper<T>& x) noexcept; // constexpr since C++20
// access
constexpr operator T& () const noexcept; // constexpr since C++20
constexpr T& get() const noexcept; // constexpr since C++20
// invoke
template <class... ArgTypes>
constexpr typename result_of<T&(ArgTypes&&...)>::type // constexpr since C++20
operator() (ArgTypes&&...) const
noexcept(is_nothrow_invocable_v<T&, ArgTypes...>); // noexcept since C++17
};
template <class T>
reference_wrapper(T&) -> reference_wrapper<T>;
template <class T> reference_wrapper<T> ref(T& t) noexcept;
template <class T> void ref(const T&& t) = delete;
template <class T> reference_wrapper<T> ref(reference_wrapper<T>t) noexcept;
template <class T> reference_wrapper<const T> cref(const T& t) noexcept;
template <class T> void cref(const T&& t) = delete;
template <class T> reference_wrapper<const T> cref(reference_wrapper<T> t) noexcept;
template <class T> struct unwrap_reference; // since C++20
template <class T> struct unwrap_ref_decay : unwrap_reference<decay_t<T>> { }; // since C++20
template <class T> using unwrap_reference_t = typename unwrap_reference<T>::type; // since C++20
template <class T> using unwrap_ref_decay_t = typename unwrap_ref_decay<T>::type; // since C++20
// [refwrap.comparisons], comparisons
friend constexpr bool operator==(reference_wrapper, reference_wrapper); // Since C++26
friend constexpr bool operator==(reference_wrapper, const T&); // Since C++26
friend constexpr bool operator==(reference_wrapper, reference_wrapper<const T>); // Since C++26
friend constexpr auto operator<=>(reference_wrapper, reference_wrapper); // Since C++26
friend constexpr auto operator<=>(reference_wrapper, const T&); // Since C++26
friend constexpr auto operator<=>(reference_wrapper, reference_wrapper<const T>); // Since C++26
template <class T> // <class T=void> in C++14
struct plus {
T operator()(const T& x, const T& y) const;
};
template <class T> // <class T=void> in C++14
struct minus {
T operator()(const T& x, const T& y) const;
};
template <class T> // <class T=void> in C++14
struct multiplies {
T operator()(const T& x, const T& y) const;
};
template <class T> // <class T=void> in C++14
struct divides {
T operator()(const T& x, const T& y) const;
};
template <class T> // <class T=void> in C++14
struct modulus {
T operator()(const T& x, const T& y) const;
};
template <class T> // <class T=void> in C++14
struct negate {
T operator()(const T& x) const;
};
template <class T> // <class T=void> in C++14
struct equal_to {
bool operator()(const T& x, const T& y) const;
};
template <class T> // <class T=void> in C++14
struct not_equal_to {
bool operator()(const T& x, const T& y) const;
};
template <class T> // <class T=void> in C++14
struct greater {
bool operator()(const T& x, const T& y) const;
};
template <class T> // <class T=void> in C++14
struct less {
bool operator()(const T& x, const T& y) const;
};
template <class T> // <class T=void> in C++14
struct greater_equal {
bool operator()(const T& x, const T& y) const;
};
template <class T> // <class T=void> in C++14
struct less_equal {
bool operator()(const T& x, const T& y) const;
};
// [comparisons.three.way], class compare_three_way
struct compare_three_way;
template <class T> // <class T=void> in C++14
struct logical_and {
bool operator()(const T& x, const T& y) const;
};
template <class T> // <class T=void> in C++14
struct logical_or {
bool operator()(const T& x, const T& y) const;
};
template <class T> // <class T=void> in C++14
struct logical_not {
bool operator()(const T& x) const;
};
template <class T> // <class T=void> in C++14
struct bit_and {
T operator()(const T& x, const T& y) const;
};
template <class T> // <class T=void> in C++14
struct bit_or {
T operator()(const T& x, const T& y) const;
};
template <class T> // <class T=void> in C++14
struct bit_xor {
T operator()(const T& x, const T& y) const;
};
template <class T=void> // C++14
struct bit_not {
T operator()(const T& x) const;
};
struct identity; // C++20
template <class Predicate>
class unary_negate // deprecated in C++17, removed in C++20
: public unary_function<typename Predicate::argument_type, bool>
{
public:
explicit unary_negate(const Predicate& pred);
bool operator()(const typename Predicate::argument_type& x) const;
};
template <class Predicate> // deprecated in C++17, removed in C++20
unary_negate<Predicate> not1(const Predicate& pred);
template <class Predicate>
class binary_negate // deprecated in C++17, removed in C++20
: public binary_function<typename Predicate::first_argument_type,
typename Predicate::second_argument_type,
bool>
{
public:
explicit binary_negate(const Predicate& pred);
bool operator()(const typename Predicate::first_argument_type& x,
const typename Predicate::second_argument_type& y) const;
};
template <class Predicate> // deprecated in C++17, removed in C++20
binary_negate<Predicate> not2(const Predicate& pred);
template <class F>
constexpr unspecified not_fn(F&& f); // C++17, constexpr in C++20
// [func.bind.partial], function templates bind_front and bind_back
template<class F, class... Args>
constexpr unspecified bind_front(F&&, Args&&...); // C++20
template<class F, class... Args>
constexpr unspecified bind_back(F&&, Args&&...); // C++23
template<class T> struct is_bind_expression;
template<class T> struct is_placeholder;
// See C++14 20.9.9, Function object binders
template <class T> inline constexpr bool is_bind_expression_v
= is_bind_expression<T>::value; // C++17
template <class T> inline constexpr int is_placeholder_v
= is_placeholder<T>::value; // C++17
template<class Fn, class... BoundArgs>
constexpr unspecified bind(Fn&&, BoundArgs&&...); // constexpr in C++20
template<class R, class Fn, class... BoundArgs>
constexpr unspecified bind(Fn&&, BoundArgs&&...); // constexpr in C++20
// [func.invoke]
template<class F, class... Args>
constexpr // constexpr in C++20
invoke_result_t<F, Args...> invoke(F&& f, Args&&... args) // C++17
noexcept(is_nothrow_invocable_v<F, Args...>);
template<class R, class F, class... Args>
constexpr R invoke_r(F&& f, Args&&... args) // C++23
noexcept(is_nothrow_invocable_r_v<R, F, Args...>);
namespace placeholders {
// M is the implementation-defined number of placeholders
extern unspecified _1;
extern unspecified _2;
.
.
.
extern unspecified _Mp;
}
template <class Operation>
class binder1st // deprecated in C++11, removed in C++17
: public unary_function<typename Operation::second_argument_type,
typename Operation::result_type>
{
protected:
Operation op;
typename Operation::first_argument_type value;
public:
binder1st(const Operation& x, const typename Operation::first_argument_type y);
typename Operation::result_type operator()( typename Operation::second_argument_type& x) const;
typename Operation::result_type operator()(const typename Operation::second_argument_type& x) const;
};
template <class Operation, class T>
binder1st<Operation> bind1st(const Operation& op, const T& x); // deprecated in C++11, removed in C++17
template <class Operation>
class binder2nd // deprecated in C++11, removed in C++17
: public unary_function<typename Operation::first_argument_type,
typename Operation::result_type>
{
protected:
Operation op;
typename Operation::second_argument_type value;
public:
binder2nd(const Operation& x, const typename Operation::second_argument_type y);
typename Operation::result_type operator()( typename Operation::first_argument_type& x) const;
typename Operation::result_type operator()(const typename Operation::first_argument_type& x) const;
};
template <class Operation, class T>
binder2nd<Operation> bind2nd(const Operation& op, const T& x); // deprecated in C++11, removed in C++17
template <class Arg, class Result> // deprecated in C++11, removed in C++17
class pointer_to_unary_function : public unary_function<Arg, Result>
{
public:
explicit pointer_to_unary_function(Result (*f)(Arg));
Result operator()(Arg x) const;
};
template <class Arg, class Result>
pointer_to_unary_function<Arg,Result> ptr_fun(Result (*f)(Arg)); // deprecated in C++11, removed in C++17
template <class Arg1, class Arg2, class Result> // deprecated in C++11, removed in C++17
class pointer_to_binary_function : public binary_function<Arg1, Arg2, Result>
{
public:
explicit pointer_to_binary_function(Result (*f)(Arg1, Arg2));
Result operator()(Arg1 x, Arg2 y) const;
};
template <class Arg1, class Arg2, class Result>
pointer_to_binary_function<Arg1,Arg2,Result> ptr_fun(Result (*f)(Arg1,Arg2)); // deprecated in C++11, removed in C++17
template<class S, class T> // deprecated in C++11, removed in C++17
class mem_fun_t : public unary_function<T*, S>
{
public:
explicit mem_fun_t(S (T::*p)());
S operator()(T* p) const;
};
template<class S, class T, class A>
class mem_fun1_t : public binary_function<T*, A, S> // deprecated in C++11, removed in C++17
{
public:
explicit mem_fun1_t(S (T::*p)(A));
S operator()(T* p, A x) const;
};
template<class S, class T> mem_fun_t<S,T> mem_fun(S (T::*f)()); // deprecated in C++11, removed in C++17
template<class S, class T, class A> mem_fun1_t<S,T,A> mem_fun(S (T::*f)(A)); // deprecated in C++11, removed in C++17
template<class S, class T>
class mem_fun_ref_t : public unary_function<T, S> // deprecated in C++11, removed in C++17
{
public:
explicit mem_fun_ref_t(S (T::*p)());
S operator()(T& p) const;
};
template<class S, class T, class A>
class mem_fun1_ref_t : public binary_function<T, A, S> // deprecated in C++11, removed in C++17
{
public:
explicit mem_fun1_ref_t(S (T::*p)(A));
S operator()(T& p, A x) const;
};
template<class S, class T>
mem_fun_ref_t<S,T> mem_fun_ref(S (T::*f)()); // deprecated in C++11, removed in C++17
template<class S, class T, class A>
mem_fun1_ref_t<S,T,A> mem_fun_ref(S (T::*f)(A)); // deprecated in C++11, removed in C++17
template <class S, class T>
class const_mem_fun_t : public unary_function<const T*, S> // deprecated in C++11, removed in C++17
{
public:
explicit const_mem_fun_t(S (T::*p)() const);
S operator()(const T* p) const;
};
template <class S, class T, class A>
class const_mem_fun1_t : public binary_function<const T*, A, S> // deprecated in C++11, removed in C++17
{
public:
explicit const_mem_fun1_t(S (T::*p)(A) const);
S operator()(const T* p, A x) const;
};
template <class S, class T>
const_mem_fun_t<S,T> mem_fun(S (T::*f)() const); // deprecated in C++11, removed in C++17
template <class S, class T, class A>
const_mem_fun1_t<S,T,A> mem_fun(S (T::*f)(A) const); // deprecated in C++11, removed in C++17
template <class S, class T>
class const_mem_fun_ref_t : public unary_function<T, S> // deprecated in C++11, removed in C++17
{
public:
explicit const_mem_fun_ref_t(S (T::*p)() const);
S operator()(const T& p) const;
};
template <class S, class T, class A>
class const_mem_fun1_ref_t : public binary_function<T, A, S> // deprecated in C++11, removed in C++17
{
public:
explicit const_mem_fun1_ref_t(S (T::*p)(A) const);
S operator()(const T& p, A x) const;
};
template <class S, class T>
const_mem_fun_ref_t<S,T> mem_fun_ref(S (T::*f)() const); // deprecated in C++11, removed in C++17
template <class S, class T, class A>
const_mem_fun1_ref_t<S,T,A> mem_fun_ref(S (T::*f)(A) const); // deprecated in C++11, removed in C++17
template<class R, class T> constexpr unspecified mem_fn(R T::*); // constexpr in C++20
class bad_function_call
: public exception
{
};
template<class> class function; // undefined
template<class R, class... ArgTypes>
class function<R(ArgTypes...)>
: public unary_function<T1, R> // iff sizeof...(ArgTypes) == 1 and
// ArgTypes contains T1
: public binary_function<T1, T2, R> // iff sizeof...(ArgTypes) == 2 and
// ArgTypes contains T1 and T2
{
public:
typedef R result_type;
// construct/copy/destroy:
function() noexcept;
function(nullptr_t) noexcept;
function(const function&);
function(function&&) noexcept;
template<class F>
function(F);
template<Allocator Alloc>
function(allocator_arg_t, const Alloc&) noexcept; // removed in C++17
template<Allocator Alloc>
function(allocator_arg_t, const Alloc&, nullptr_t) noexcept; // removed in C++17
template<Allocator Alloc>
function(allocator_arg_t, const Alloc&, const function&); // removed in C++17
template<Allocator Alloc>
function(allocator_arg_t, const Alloc&, function&&); // removed in C++17
template<class F, Allocator Alloc>
function(allocator_arg_t, const Alloc&, F); // removed in C++17
function& operator=(const function&);
function& operator=(function&&) noexcept;
function& operator=(nullptr_t) noexcept;
template<class F>
function& operator=(F&&);
template<class F>
function& operator=(reference_wrapper<F>) noexcept;
~function();
// function modifiers:
void swap(function&) noexcept;
template<class F, class Alloc>
void assign(F&&, const Alloc&); // Removed in C++17
// function capacity:
explicit operator bool() const noexcept;
// function invocation:
R operator()(ArgTypes...) const;
// function target access:
const std::type_info& target_type() const noexcept;
template <typename T> T* target() noexcept;
template <typename T> const T* target() const noexcept;
};
// Deduction guides
template<class R, class ...Args>
function(R(*)(Args...)) -> function<R(Args...)>; // since C++17
template<class F>
function(F) -> function<see-below>; // since C++17
// Null pointer comparisons:
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; // removed in C++20
template <class R, class ... ArgTypes>
bool operator!=(const function<R(ArgTypes...)>&, nullptr_t) noexcept; // removed in C++20
template <class R, class ... ArgTypes>
bool operator!=(nullptr_t, const function<R(ArgTypes...)>&) noexcept; // removed in C++20
// specialized algorithms:
template <class R, class ... ArgTypes>
void swap(function<R(ArgTypes...)>&, function<R(ArgTypes...)>&) noexcept;
template <class T> struct hash;
template <> struct hash<bool>;
template <> struct hash<char>;
template <> struct hash<signed char>;
template <> struct hash<unsigned char>;
template <> struct hash<char8_t>; // since C++20
template <> struct hash<char16_t>;
template <> struct hash<char32_t>;
template <> struct hash<wchar_t>;
template <> struct hash<short>;
template <> struct hash<unsigned short>;
template <> struct hash<int>;
template <> struct hash<unsigned int>;
template <> struct hash<long>;
template <> struct hash<long long>;
template <> struct hash<unsigned long>;
template <> struct hash<unsigned long long>;
template <> struct hash<float>;
template <> struct hash<double>;
template <> struct hash<long double>;
template<class T> struct hash<T*>;
template <> struct hash<nullptr_t>; // C++17
namespace ranges {
// [range.cmp], concept-constrained comparisons
struct equal_to;
struct not_equal_to;
struct greater;
struct less;
struct greater_equal;
struct less_equal;
}
} // std
POLICY: For non-variadic implementations, the number of arguments is limited
to 3. It is hoped that the need for non-variadic implementations
will be minimal.
*/
#include <__config>
#include <__functional/binary_function.h>
#include <__functional/binary_negate.h>
#include <__functional/bind.h>
#include <__functional/binder1st.h>
#include <__functional/binder2nd.h>
#include <__functional/hash.h>
#include <__functional/mem_fn.h> // TODO: deprecate
#include <__functional/mem_fun_ref.h>
#include <__functional/operations.h>
#include <__functional/pointer_to_binary_function.h>
#include <__functional/pointer_to_unary_function.h>
#include <__functional/reference_wrapper.h>
#include <__functional/unary_function.h>
#include <__functional/unary_negate.h>
#ifndef _LIBCPP_CXX03_LANG
# include <__functional/function.h>
#endif
#if _LIBCPP_STD_VER >= 17
# include <__functional/boyer_moore_searcher.h>
# include <__functional/default_searcher.h>
# include <__functional/invoke.h>
# include <__functional/not_fn.h>
#endif
#if _LIBCPP_STD_VER >= 20
# include <__functional/bind_back.h>
# include <__functional/bind_front.h>
# include <__functional/identity.h>
# include <__functional/ranges_operations.h>
# include <__type_traits/unwrap_ref.h>
#endif
#include <version>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && defined(_LIBCPP_CXX03_LANG)
# include <limits>
# include <new>
#endif
#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 14
# include <array>
# include <initializer_list>
# include <unordered_map>
# include <vector>
#endif
#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
# include <atomic>
# include <concepts>
# include <cstdlib>
# include <exception>
# include <iosfwd>
# include <memory>
# include <stdexcept>
# include <tuple>
# include <type_traits>
# include <typeinfo>
# include <utility>
#endif
#endif // _LIBCPP_FUNCTIONAL
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