Remove libc++ and libc++abi 8.0.0 now that we switched to version 10.0.1

in the gnu/ directory.

1 files changed, 0 insertions, 834 deletions

diff --git a/lib/libcxx/include/string_view b/lib/libcxx/include/string_view
deleted file mode 100644
index 7d783122f12..00000000000
--- a/lib/libcxx/include/string_view
+++ /dev/null
@@ -1,834 +0,0 @@
-// -*- C++ -*-
-//===------------------------ string_view ---------------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef _LIBCPP_STRING_VIEW
-#define _LIBCPP_STRING_VIEW
-
-/*
-string_view synopsis
-
-namespace std {
-
-    // 7.2, Class template basic_string_view
-    template<class charT, class traits = char_traits<charT>>
-        class basic_string_view;
-
-    // 7.9, basic_string_view non-member comparison functions
-    template<class charT, class traits>
-    constexpr bool operator==(basic_string_view<charT, traits> x,
-                              basic_string_view<charT, traits> y) noexcept;
-    template<class charT, class traits>
-    constexpr bool operator!=(basic_string_view<charT, traits> x,
-                              basic_string_view<charT, traits> y) noexcept;
-    template<class charT, class traits>
-    constexpr bool operator< (basic_string_view<charT, traits> x,
-                                 basic_string_view<charT, traits> y) noexcept;
-    template<class charT, class traits>
-    constexpr bool operator> (basic_string_view<charT, traits> x,
-                              basic_string_view<charT, traits> y) noexcept;
-    template<class charT, class traits>
-    constexpr bool operator<=(basic_string_view<charT, traits> x,
-                                 basic_string_view<charT, traits> y) noexcept;
-    template<class charT, class traits>
-    constexpr bool operator>=(basic_string_view<charT, traits> x,
-                              basic_string_view<charT, traits> y) noexcept;
-    // see below, sufficient additional overloads of comparison functions
-
-    // 7.10, Inserters and extractors
-    template<class charT, class traits>
-      basic_ostream<charT, traits>&
-        operator<<(basic_ostream<charT, traits>& os,
-                   basic_string_view<charT, traits> str);
-
-    // basic_string_view typedef names
-    typedef basic_string_view<char> string_view;
-    typedef basic_string_view<char16_t> u16string_view;
-    typedef basic_string_view<char32_t> u32string_view;
-    typedef basic_string_view<wchar_t> wstring_view;
-
-    template<class charT, class traits = char_traits<charT>>
-    class basic_string_view {
-      public:
-      // types
-      typedef traits traits_type;
-      typedef charT value_type;
-      typedef charT* pointer;
-      typedef const charT* const_pointer;
-      typedef charT& reference;
-      typedef const charT& const_reference;
-      typedef implementation-defined const_iterator;
-      typedef const_iterator iterator;
-      typedef reverse_iterator<const_iterator> const_reverse_iterator;
-      typedef const_reverse_iterator reverse_iterator;
-      typedef size_t size_type;
-      typedef ptrdiff_t difference_type;
-      static constexpr size_type npos = size_type(-1);
-
-      // 7.3, basic_string_view constructors and assignment operators
-      constexpr basic_string_view() noexcept;
-      constexpr basic_string_view(const basic_string_view&) noexcept = default;
-      basic_string_view& operator=(const basic_string_view&) noexcept = default;
-      template<class Allocator>
-      constexpr basic_string_view(const charT* str);
-      constexpr basic_string_view(const charT* str, size_type len);
-
-      // 7.4, basic_string_view iterator support
-      constexpr const_iterator begin() const noexcept;
-      constexpr const_iterator end() const noexcept;
-      constexpr const_iterator cbegin() const noexcept;
-      constexpr const_iterator cend() const noexcept;
-      const_reverse_iterator rbegin() const noexcept;
-      const_reverse_iterator rend() const noexcept;
-      const_reverse_iterator crbegin() const noexcept;
-      const_reverse_iterator crend() const noexcept;
-
-      // 7.5, basic_string_view capacity
-      constexpr size_type size() const noexcept;
-      constexpr size_type length() const noexcept;
-      constexpr size_type max_size() const noexcept;
-      constexpr bool empty() const noexcept;
-
-      // 7.6, basic_string_view element access
-      constexpr const_reference operator[](size_type pos) const;
-      constexpr const_reference at(size_type pos) const;
-      constexpr const_reference front() const;
-      constexpr const_reference back() const;
-      constexpr const_pointer data() const noexcept;
-
-      // 7.7, basic_string_view modifiers
-      constexpr void remove_prefix(size_type n);
-      constexpr void remove_suffix(size_type n);
-      constexpr void swap(basic_string_view& s) noexcept;
-
-      size_type copy(charT* s, size_type n, size_type pos = 0) const;
-
-      constexpr basic_string_view substr(size_type pos = 0, size_type n = npos) const;
-      constexpr int compare(basic_string_view s) const noexcept;
-      constexpr int compare(size_type pos1, size_type n1, basic_string_view s) const;
-      constexpr int compare(size_type pos1, size_type n1,
-                            basic_string_view s, size_type pos2, size_type n2) const;
-      constexpr int compare(const charT* s) const;
-      constexpr int compare(size_type pos1, size_type n1, const charT* s) const;
-      constexpr int compare(size_type pos1, size_type n1,
-                            const charT* s, size_type n2) const;
-      constexpr size_type find(basic_string_view s, size_type pos = 0) const noexcept;
-      constexpr size_type find(charT c, size_type pos = 0) const noexcept;
-      constexpr size_type find(const charT* s, size_type pos, size_type n) const;
-      constexpr size_type find(const charT* s, size_type pos = 0) const;
-      constexpr size_type rfind(basic_string_view s, size_type pos = npos) const noexcept;
-      constexpr size_type rfind(charT c, size_type pos = npos) const noexcept;
-      constexpr size_type rfind(const charT* s, size_type pos, size_type n) const;
-      constexpr size_type rfind(const charT* s, size_type pos = npos) const;
-      constexpr size_type find_first_of(basic_string_view s, size_type pos = 0) const noexcept;
-      constexpr size_type find_first_of(charT c, size_type pos = 0) const noexcept;
-      constexpr size_type find_first_of(const charT* s, size_type pos, size_type n) const;
-      constexpr size_type find_first_of(const charT* s, size_type pos = 0) const;
-      constexpr size_type find_last_of(basic_string_view s, size_type pos = npos) const noexcept;
-      constexpr size_type find_last_of(charT c, size_type pos = npos) const noexcept;
-      constexpr size_type find_last_of(const charT* s, size_type pos, size_type n) const;
-      constexpr size_type find_last_of(const charT* s, size_type pos = npos) const;
-      constexpr size_type find_first_not_of(basic_string_view s, size_type pos = 0) const noexcept;
-      constexpr size_type find_first_not_of(charT c, size_type pos = 0) const noexcept;
-      constexpr size_type find_first_not_of(const charT* s, size_type pos, size_type n) const;
-      constexpr size_type find_first_not_of(const charT* s, size_type pos = 0) const;
-      constexpr size_type find_last_not_of(basic_string_view s, size_type pos = npos) const noexcept;
-      constexpr size_type find_last_not_of(charT c, size_type pos = npos) const noexcept;
-      constexpr size_type find_last_not_of(const charT* s, size_type pos, size_type n) const;
-      constexpr size_type find_last_not_of(const charT* s, size_type pos = npos) const;
-
-      constexpr bool starts_with(basic_string_view s) const noexcept; // C++2a
-      constexpr bool starts_with(charT c) const noexcept;             // C++2a
-      constexpr bool starts_with(const charT* s) const;               // C++2a
-      constexpr bool ends_with(basic_string_view s) const noexcept;   // C++2a
-      constexpr bool ends_with(charT c) const noexcept;               // C++2a
-      constexpr bool ends_with(const charT* s) const;                 // C++2a
-
-     private:
-      const_pointer data_;  // exposition only
-      size_type     size_;  // exposition only
-    };
-
-  // 7.11, Hash support
-  template <class T> struct hash;
-  template <> struct hash<string_view>;
-  template <> struct hash<u16string_view>;
-  template <> struct hash<u32string_view>;
-  template <> struct hash<wstring_view>;
-
-  constexpr basic_string_view<char>     operator "" sv( const char *str,     size_t len ) noexcept;
-  constexpr basic_string_view<wchar_t>  operator "" sv( const wchar_t *str,  size_t len ) noexcept;
-  constexpr basic_string_view<char16_t> operator "" sv( const char16_t *str, size_t len ) noexcept;
-  constexpr basic_string_view<char32_t> operator "" sv( const char32_t *str, size_t len ) noexcept;
-
-}  // namespace std
-
-
-*/
-
-#include <__config>
-#include <__string>
-#include <algorithm>
-#include <iterator>
-#include <limits>
-#include <stdexcept>
-#include <version>
-#include <__debug>
-
-#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
-#endif
-
-_LIBCPP_PUSH_MACROS
-#include <__undef_macros>
-
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-template<class _CharT, class _Traits = char_traits<_CharT> >
-class _LIBCPP_TEMPLATE_VIS basic_string_view {
-public:
-    // types
-    typedef _Traits                                    traits_type;
-    typedef _CharT                                     value_type;
-    typedef _CharT*                                    pointer;
-    typedef const _CharT*                              const_pointer;
-    typedef _CharT&                                    reference;
-    typedef const _CharT&                              const_reference;
-    typedef const_pointer                              const_iterator; // See [string.view.iterators]
-    typedef const_iterator                             iterator;
-    typedef _VSTD::reverse_iterator<const_iterator>    const_reverse_iterator;
-    typedef const_reverse_iterator                     reverse_iterator;
-    typedef size_t                                     size_type;
-    typedef ptrdiff_t                                  difference_type;
-    static _LIBCPP_CONSTEXPR const size_type npos = -1; // size_type(-1);
-
-    static_assert((!is_array<value_type>::value), "Character type of basic_string_view must not be an array");
-    static_assert(( is_standard_layout<value_type>::value), "Character type of basic_string_view must be standard-layout");
-    static_assert(( is_trivial<value_type>::value), "Character type of basic_string_view must be trivial");
-    static_assert((is_same<_CharT, typename traits_type::char_type>::value),
-                  "traits_type::char_type must be the same type as CharT");
-
-    // [string.view.cons], construct/copy
-    _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
-    basic_string_view() _NOEXCEPT : __data (nullptr), __size(0) {}
-
-    _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
-    basic_string_view(const basic_string_view&) _NOEXCEPT = default;
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    basic_string_view& operator=(const basic_string_view&) _NOEXCEPT = default;
-
-    _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
-    basic_string_view(const _CharT* __s, size_type __len) _NOEXCEPT
-        : __data(__s), __size(__len)
-    {
-// #if _LIBCPP_STD_VER > 11
-//         _LIBCPP_ASSERT(__len == 0 || __s != nullptr, "string_view::string_view(_CharT *, size_t): received nullptr");
-// #endif
-    }
-
-    _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
-    basic_string_view(const _CharT* __s)
-        : __data(__s), __size(_Traits::length(__s)) {}
-
-    // [string.view.iterators], iterators
-    _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
-    const_iterator begin()  const _NOEXCEPT { return cbegin(); }
-
-    _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
-    const_iterator end()    const _NOEXCEPT { return cend(); }
-
-    _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
-    const_iterator cbegin() const _NOEXCEPT { return __data; }
-
-    _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
-    const_iterator cend()   const _NOEXCEPT { return __data + __size; }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX14 _LIBCPP_INLINE_VISIBILITY
-    const_reverse_iterator rbegin()   const _NOEXCEPT { return const_reverse_iterator(cend()); }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX14 _LIBCPP_INLINE_VISIBILITY
-    const_reverse_iterator rend()     const _NOEXCEPT { return const_reverse_iterator(cbegin()); }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX14 _LIBCPP_INLINE_VISIBILITY
-    const_reverse_iterator crbegin()  const _NOEXCEPT { return const_reverse_iterator(cend()); }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX14 _LIBCPP_INLINE_VISIBILITY
-    const_reverse_iterator crend()    const _NOEXCEPT { return const_reverse_iterator(cbegin()); }
-
-    // [string.view.capacity], capacity
-    _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
-    size_type size()     const _NOEXCEPT { return __size; }
-
-    _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
-    size_type length()   const _NOEXCEPT { return __size; }
-
-    _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
-    size_type max_size() const _NOEXCEPT { return numeric_limits<size_type>::max(); }
-
-    _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
-    bool empty()         const _NOEXCEPT { return __size == 0; }
-
-    // [string.view.access], element access
-    _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
-    const_reference operator[](size_type __pos) const _NOEXCEPT { return __data[__pos]; }
-
-    _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
-    const_reference at(size_type __pos) const
-    {
-        return __pos >= size()
-            ? (__throw_out_of_range("string_view::at"), __data[0])
-            : __data[__pos];
-    }
-
-    _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
-    const_reference front() const
-    {
-        return _LIBCPP_ASSERT(!empty(), "string_view::front(): string is empty"), __data[0];
-    }
-
-    _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
-    const_reference back() const
-    {
-        return _LIBCPP_ASSERT(!empty(), "string_view::back(): string is empty"), __data[__size-1];
-    }
-
-    _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
-    const_pointer data() const _NOEXCEPT { return __data; }
-
-    // [string.view.modifiers], modifiers:
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    void remove_prefix(size_type __n) _NOEXCEPT
-    {
-        _LIBCPP_ASSERT(__n <= size(), "remove_prefix() can't remove more than size()");
-        __data += __n;
-        __size -= __n;
-    }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    void remove_suffix(size_type __n) _NOEXCEPT
-    {
-        _LIBCPP_ASSERT(__n <= size(), "remove_suffix() can't remove more than size()");
-        __size -= __n;
-    }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    void swap(basic_string_view& __other) _NOEXCEPT
-    {
-        const value_type *__p = __data;
-        __data = __other.__data;
-        __other.__data = __p;
-
-        size_type __sz = __size;
-        __size = __other.__size;
-        __other.__size = __sz;
-    }
-
-    _LIBCPP_INLINE_VISIBILITY
-    size_type copy(_CharT* __s, size_type __n, size_type __pos = 0) const
-    {
-        if (__pos > size())
-            __throw_out_of_range("string_view::copy");
-        size_type __rlen = _VSTD::min(__n, size() - __pos);
-        _Traits::copy(__s, data() + __pos, __rlen);
-        return __rlen;
-    }
-
-    _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
-    basic_string_view substr(size_type __pos = 0, size_type __n = npos) const
-    {
-        return __pos > size()
-            ? (__throw_out_of_range("string_view::substr"), basic_string_view())
-            : basic_string_view(data() + __pos, _VSTD::min(__n, size() - __pos));
-    }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 int compare(basic_string_view __sv) const _NOEXCEPT
-    {
-        size_type __rlen = _VSTD::min( size(), __sv.size());
-        int __retval = _Traits::compare(data(), __sv.data(), __rlen);
-        if ( __retval == 0 ) // first __rlen chars matched
-            __retval = size() == __sv.size() ? 0 : ( size() < __sv.size() ? -1 : 1 );
-        return __retval;
-    }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    int compare(size_type __pos1, size_type __n1, basic_string_view __sv) const
-    {
-        return substr(__pos1, __n1).compare(__sv);
-    }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    int compare(                       size_type __pos1, size_type __n1, 
-                basic_string_view __sv, size_type __pos2, size_type __n2) const
-    {
-        return substr(__pos1, __n1).compare(__sv.substr(__pos2, __n2));
-    }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    int compare(const _CharT* __s) const _NOEXCEPT
-    {
-        return compare(basic_string_view(__s));
-    }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    int compare(size_type __pos1, size_type __n1, const _CharT* __s) const
-    {
-        return substr(__pos1, __n1).compare(basic_string_view(__s));
-    }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    int compare(size_type __pos1, size_type __n1, const _CharT* __s, size_type __n2) const
-    {
-        return substr(__pos1, __n1).compare(basic_string_view(__s, __n2));
-    }
-
-    // find
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    size_type find(basic_string_view __s, size_type __pos = 0) const _NOEXCEPT
-    {
-        _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find(): received nullptr");
-        return __str_find<value_type, size_type, traits_type, npos>
-            (data(), size(), __s.data(), __pos, __s.size());
-    }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    size_type find(_CharT __c, size_type __pos = 0) const _NOEXCEPT
-    {
-        return __str_find<value_type, size_type, traits_type, npos>
-            (data(), size(), __c, __pos);
-    }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    size_type find(const _CharT* __s, size_type __pos, size_type __n) const
-    {
-        _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find(): received nullptr");
-        return __str_find<value_type, size_type, traits_type, npos>
-            (data(), size(), __s, __pos, __n);
-    }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    size_type find(const _CharT* __s, size_type __pos = 0) const
-    {
-        _LIBCPP_ASSERT(__s != nullptr, "string_view::find(): received nullptr");
-        return __str_find<value_type, size_type, traits_type, npos>
-            (data(), size(), __s, __pos, traits_type::length(__s));
-    }
-
-    // rfind
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    size_type rfind(basic_string_view __s, size_type __pos = npos) const _NOEXCEPT
-    {
-        _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find(): received nullptr");
-        return __str_rfind<value_type, size_type, traits_type, npos>
-            (data(), size(), __s.data(), __pos, __s.size());
-    }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    size_type rfind(_CharT __c, size_type __pos = npos) const _NOEXCEPT
-    {
-        return __str_rfind<value_type, size_type, traits_type, npos>
-            (data(), size(), __c, __pos);
-    }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    size_type rfind(const _CharT* __s, size_type __pos, size_type __n) const
-    {
-        _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::rfind(): received nullptr");
-        return __str_rfind<value_type, size_type, traits_type, npos>
-            (data(), size(), __s, __pos, __n);
-    }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    size_type rfind(const _CharT* __s, size_type __pos=npos) const
-    {
-        _LIBCPP_ASSERT(__s != nullptr, "string_view::rfind(): received nullptr");
-        return __str_rfind<value_type, size_type, traits_type, npos>
-            (data(), size(), __s, __pos, traits_type::length(__s));
-    }
-
-    // find_first_of
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    size_type find_first_of(basic_string_view __s, size_type __pos = 0) const _NOEXCEPT
-    {
-        _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_first_of(): received nullptr");
-        return __str_find_first_of<value_type, size_type, traits_type, npos>
-            (data(), size(), __s.data(), __pos, __s.size());
-    }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    size_type find_first_of(_CharT __c, size_type __pos = 0) const _NOEXCEPT
-    { return find(__c, __pos); }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    size_type find_first_of(const _CharT* __s, size_type __pos, size_type __n) const
-    {
-        _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_first_of(): received nullptr");
-        return __str_find_first_of<value_type, size_type, traits_type, npos>
-            (data(), size(), __s, __pos, __n);
-    }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    size_type find_first_of(const _CharT* __s, size_type __pos=0) const
-    {
-        _LIBCPP_ASSERT(__s != nullptr, "string_view::find_first_of(): received nullptr");
-        return __str_find_first_of<value_type, size_type, traits_type, npos>
-            (data(), size(), __s, __pos, traits_type::length(__s));
-    }
-
-    // find_last_of
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    size_type find_last_of(basic_string_view __s, size_type __pos=npos) const _NOEXCEPT
-    {
-        _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_last_of(): received nullptr");
-        return __str_find_last_of<value_type, size_type, traits_type, npos>
-            (data(), size(), __s.data(), __pos, __s.size());
-    }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    size_type find_last_of(_CharT __c, size_type __pos = npos) const _NOEXCEPT
-    { return rfind(__c, __pos); }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    size_type find_last_of(const _CharT* __s, size_type __pos, size_type __n) const
-    {
-        _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_last_of(): received nullptr");
-        return __str_find_last_of<value_type, size_type, traits_type, npos>
-            (data(), size(), __s, __pos, __n);
-    }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    size_type find_last_of(const _CharT* __s, size_type __pos=npos) const
-    {
-        _LIBCPP_ASSERT(__s != nullptr, "string_view::find_last_of(): received nullptr");
-        return __str_find_last_of<value_type, size_type, traits_type, npos>
-            (data(), size(), __s, __pos, traits_type::length(__s));
-    }
-
-    // find_first_not_of
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    size_type find_first_not_of(basic_string_view __s, size_type __pos=0) const _NOEXCEPT
-    {
-        _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_first_not_of(): received nullptr");
-        return __str_find_first_not_of<value_type, size_type, traits_type, npos>
-            (data(), size(), __s.data(), __pos, __s.size());
-    }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    size_type find_first_not_of(_CharT __c, size_type __pos=0) const _NOEXCEPT
-    {
-        return __str_find_first_not_of<value_type, size_type, traits_type, npos>
-            (data(), size(), __c, __pos);
-    }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    size_type find_first_not_of(const _CharT* __s, size_type __pos, size_type __n) const
-    {
-        _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_first_not_of(): received nullptr");
-        return __str_find_first_not_of<value_type, size_type, traits_type, npos>
-            (data(), size(), __s, __pos, __n);
-    }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    size_type find_first_not_of(const _CharT* __s, size_type __pos=0) const
-    {
-        _LIBCPP_ASSERT(__s != nullptr, "string_view::find_first_not_of(): received nullptr");
-        return __str_find_first_not_of<value_type, size_type, traits_type, npos>
-            (data(), size(), __s, __pos, traits_type::length(__s));
-    }
-
-    // find_last_not_of
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    size_type find_last_not_of(basic_string_view __s, size_type __pos=npos) const _NOEXCEPT
-    {
-        _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_last_not_of(): received nullptr");
-        return __str_find_last_not_of<value_type, size_type, traits_type, npos>
-            (data(), size(), __s.data(), __pos, __s.size());
-    }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    size_type find_last_not_of(_CharT __c, size_type __pos=npos) const _NOEXCEPT
-    {
-        return __str_find_last_not_of<value_type, size_type, traits_type, npos>
-            (data(), size(), __c, __pos);
-    }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    size_type find_last_not_of(const _CharT* __s, size_type __pos, size_type __n) const
-    {
-        _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_last_not_of(): received nullptr");
-        return __str_find_last_not_of<value_type, size_type, traits_type, npos>
-            (data(), size(), __s, __pos, __n);
-    }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    size_type find_last_not_of(const _CharT* __s, size_type __pos=npos) const
-    {
-        _LIBCPP_ASSERT(__s != nullptr, "string_view::find_last_not_of(): received nullptr");
-        return __str_find_last_not_of<value_type, size_type, traits_type, npos>
-            (data(), size(), __s, __pos, traits_type::length(__s));
-    }
-
-#if _LIBCPP_STD_VER > 17
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    bool starts_with(basic_string_view __s) const _NOEXCEPT
-    { return size() >= __s.size() && compare(0, __s.size(), __s) == 0; }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    bool starts_with(value_type __c) const _NOEXCEPT
-    { return !empty() && _Traits::eq(front(), __c); }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    bool starts_with(const value_type* __s) const _NOEXCEPT
-    { return starts_with(basic_string_view(__s)); }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    bool ends_with(basic_string_view __s) const _NOEXCEPT
-    { return size() >= __s.size() && compare(size() - __s.size(), npos, __s) == 0; }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    bool ends_with(value_type __c) const _NOEXCEPT
-    { return !empty() && _Traits::eq(back(), __c); }
-
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    bool ends_with(const value_type* __s) const _NOEXCEPT
-    { return ends_with(basic_string_view(__s)); }
-#endif
-
-private:
-    const   value_type* __data;
-    size_type           __size;
-};
-
-
-// [string.view.comparison]
-// operator ==
-template<class _CharT, class _Traits>
-_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-bool operator==(basic_string_view<_CharT, _Traits> __lhs,
-                basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
-{
-    if ( __lhs.size() != __rhs.size()) return false;
-    return __lhs.compare(__rhs) == 0;
-}
-
-template<class _CharT, class _Traits>
-_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-bool operator==(basic_string_view<_CharT, _Traits> __lhs,
-                typename common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
-{
-    if ( __lhs.size() != __rhs.size()) return false;
-    return __lhs.compare(__rhs) == 0;
-}
-
-template<class _CharT, class _Traits>
-_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-bool operator==(typename common_type<basic_string_view<_CharT, _Traits> >::type __lhs, 
-                basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
-{
-    if ( __lhs.size() != __rhs.size()) return false;
-    return __lhs.compare(__rhs) == 0;
-}
-
-
-// operator !=
-template<class _CharT, class _Traits>
-_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-bool operator!=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
-{
-    if ( __lhs.size() != __rhs.size())
-        return true;
-    return __lhs.compare(__rhs) != 0;
-}
-
-template<class _CharT, class _Traits>
-_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-bool operator!=(basic_string_view<_CharT, _Traits> __lhs,
-                typename common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
-{
-    if ( __lhs.size() != __rhs.size())
-        return true;
-    return __lhs.compare(__rhs) != 0;
-}
-
-template<class _CharT, class _Traits>
-_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-bool operator!=(typename common_type<basic_string_view<_CharT, _Traits> >::type __lhs, 
-                basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
-{
-    if ( __lhs.size() != __rhs.size())
-        return true;
-    return __lhs.compare(__rhs) != 0;
-}
-
-
-// operator <
-template<class _CharT, class _Traits>
-_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-bool operator<(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
-{
-    return __lhs.compare(__rhs) < 0;
-}
-
-template<class _CharT, class _Traits>
-_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-bool operator<(basic_string_view<_CharT, _Traits> __lhs,
-                typename common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
-{
-    return __lhs.compare(__rhs) < 0;
-}
-
-template<class _CharT, class _Traits>
-_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-bool operator<(typename common_type<basic_string_view<_CharT, _Traits> >::type __lhs, 
-                basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
-{
-    return __lhs.compare(__rhs) < 0;
-}
-
-
-// operator >
-template<class _CharT, class _Traits>
-_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-bool operator> (basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
-{
-    return __lhs.compare(__rhs) > 0;
-}
-
-template<class _CharT, class _Traits>
-_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-bool operator>(basic_string_view<_CharT, _Traits> __lhs,
-                typename common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
-{
-    return __lhs.compare(__rhs) > 0;
-}
-
-template<class _CharT, class _Traits>
-_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-bool operator>(typename common_type<basic_string_view<_CharT, _Traits> >::type __lhs, 
-                basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
-{
-    return __lhs.compare(__rhs) > 0;
-}
-
-
-// operator <=
-template<class _CharT, class _Traits>
-_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-bool operator<=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
-{
-    return __lhs.compare(__rhs) <= 0;
-}
-
-template<class _CharT, class _Traits>
-_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-bool operator<=(basic_string_view<_CharT, _Traits> __lhs,
-                typename common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
-{
-    return __lhs.compare(__rhs) <= 0;
-}
-
-template<class _CharT, class _Traits>
-_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-bool operator<=(typename common_type<basic_string_view<_CharT, _Traits> >::type __lhs, 
-                basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
-{
-    return __lhs.compare(__rhs) <= 0;
-}
-
-
-// operator >=
-template<class _CharT, class _Traits>
-_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-bool operator>=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
-{
-    return __lhs.compare(__rhs) >= 0;
-}
-
-
-template<class _CharT, class _Traits>
-_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-bool operator>=(basic_string_view<_CharT, _Traits> __lhs,
-                typename common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
-{
-    return __lhs.compare(__rhs) >= 0;
-}
-
-template<class _CharT, class _Traits>
-_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-bool operator>=(typename common_type<basic_string_view<_CharT, _Traits> >::type __lhs, 
-                basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
-{
-    return __lhs.compare(__rhs) >= 0;
-}
-
-typedef basic_string_view<char>     string_view;
-#ifndef _LIBCPP_NO_HAS_CHAR8_T
-typedef basic_string_view<char8_t>  u8string_view;
-#endif
-typedef basic_string_view<char16_t> u16string_view;
-typedef basic_string_view<char32_t> u32string_view;
-typedef basic_string_view<wchar_t>  wstring_view;
-
-// [string.view.hash]
-template<class _CharT, class _Traits>
-struct _LIBCPP_TEMPLATE_VIS hash<basic_string_view<_CharT, _Traits> >
-    : public unary_function<basic_string_view<_CharT, _Traits>, size_t>
-{
-    _LIBCPP_INLINE_VISIBILITY
-    size_t operator()(const basic_string_view<_CharT, _Traits> __val) const _NOEXCEPT {
-        return __do_string_hash(__val.data(), __val.data() + __val.size());
-    }
-};
-
-
-#if _LIBCPP_STD_VER > 11 
-inline namespace literals
-{
-  inline namespace string_view_literals
-  {
-    inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
-    basic_string_view<char> operator "" sv(const char *__str, size_t __len) _NOEXCEPT
-    {
-        return basic_string_view<char> (__str, __len);
-    }
-
-    inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
-    basic_string_view<wchar_t> operator "" sv(const wchar_t *__str, size_t __len) _NOEXCEPT
-    {
-        return basic_string_view<wchar_t> (__str, __len);
-    }
-
-#ifndef _LIBCPP_NO_HAS_CHAR8_T
-    inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
-    basic_string_view<char8_t> operator "" sv(const char8_t *__str, size_t __len) _NOEXCEPT
-    {
-        return basic_string_view<char8_t> (__str, __len);
-    }
-#endif
-
-    inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
-    basic_string_view<char16_t> operator "" sv(const char16_t *__str, size_t __len) _NOEXCEPT
-    {
-        return basic_string_view<char16_t> (__str, __len);
-    }
-
-    inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
-    basic_string_view<char32_t> operator "" sv(const char32_t *__str, size_t __len) _NOEXCEPT
-    {
-        return basic_string_view<char32_t> (__str, __len);
-    }
-  }
-}
-#endif
-_LIBCPP_END_NAMESPACE_STD
-
-_LIBCPP_POP_MACROS
-
-#endif // _LIBCPP_STRING_VIEW