From 8cace3f05003c6cb4d38c36890055f03151c2ad4 Mon Sep 17 00:00:00 2001
From: Richard Qin <richard.qin.x@gmail.com>
Date: Fri, 16 Oct 2026 02:39:56 +0800
Subject: Remove old code

Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
---
 third_party/libcxx/include/c++/v1/functional | 611 ---------------------------
 1 file changed, 611 deletions(-)
 delete mode 100644 third_party/libcxx/include/c++/v1/functional

(limited to 'third_party/libcxx/include/c++/v1/functional')

diff --git a/third_party/libcxx/include/c++/v1/functional b/third_party/libcxx/include/c++/v1/functional
deleted file mode 100644
index 020754a..0000000
--- a/third_party/libcxx/include/c++/v1/functional
+++ /dev/null
@@ -1,611 +0,0 @@
-// -*- 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
-template <auto f>
-  constexpr unspecified not_fn() noexcept; // C++26
-
-// [func.bind.partial], function templates bind_front and bind_back
-template<class F, class... Args>
-  constexpr unspecified bind_front(F&&, Args&&...); // C++20
-template<auto f, class... Args>
-  constexpr unspecified bind_front(Args&&...);      // C++26
-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::*) noexcept;       // 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.
-
-*/
-
-#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
-#  include <__cxx03/functional>
-#else
-#  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/common_reference.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>
-#  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>
-#    include <vector>
-#  endif
-
-#  if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER == 23
-#    include <__vector/vector.h>
-#  endif
-#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
-
-#endif // _LIBCPP_FUNCTIONAL
-- 
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