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1 // -*- C++ -*-
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2 //===------------------------ string_view ---------------------------------===//
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3 //
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4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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5 // See https://llvm.org/LICENSE.txt for license information.
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6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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7 //
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8 //===----------------------------------------------------------------------===//
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9
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10 #ifndef _LIBCPP_STRING_VIEW
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11 #define _LIBCPP_STRING_VIEW
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12
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13 /*
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14 string_view synopsis
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15
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16 namespace std {
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17
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18 // 7.2, Class template basic_string_view
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19 template<class charT, class traits = char_traits<charT>>
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20 class basic_string_view;
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21
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22 // 7.9, basic_string_view non-member comparison functions
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23 template<class charT, class traits>
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24 constexpr bool operator==(basic_string_view<charT, traits> x,
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25 basic_string_view<charT, traits> y) noexcept;
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26 template<class charT, class traits>
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27 constexpr bool operator!=(basic_string_view<charT, traits> x,
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28 basic_string_view<charT, traits> y) noexcept;
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29 template<class charT, class traits>
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30 constexpr bool operator< (basic_string_view<charT, traits> x,
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31 basic_string_view<charT, traits> y) noexcept;
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32 template<class charT, class traits>
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33 constexpr bool operator> (basic_string_view<charT, traits> x,
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34 basic_string_view<charT, traits> y) noexcept;
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35 template<class charT, class traits>
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36 constexpr bool operator<=(basic_string_view<charT, traits> x,
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37 basic_string_view<charT, traits> y) noexcept;
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38 template<class charT, class traits>
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39 constexpr bool operator>=(basic_string_view<charT, traits> x,
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40 basic_string_view<charT, traits> y) noexcept;
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41 // see below, sufficient additional overloads of comparison functions
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42
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43 // 7.10, Inserters and extractors
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44 template<class charT, class traits>
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45 basic_ostream<charT, traits>&
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46 operator<<(basic_ostream<charT, traits>& os,
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47 basic_string_view<charT, traits> str);
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48
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49 // basic_string_view typedef names
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50 typedef basic_string_view<char> string_view;
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51 typedef basic_string_view<char16_t> u16string_view;
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52 typedef basic_string_view<char32_t> u32string_view;
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53 typedef basic_string_view<wchar_t> wstring_view;
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54
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55 template<class charT, class traits = char_traits<charT>>
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56 class basic_string_view {
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57 public:
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58 // types
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59 typedef traits traits_type;
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60 typedef charT value_type;
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61 typedef charT* pointer;
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62 typedef const charT* const_pointer;
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63 typedef charT& reference;
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64 typedef const charT& const_reference;
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65 typedef implementation-defined const_iterator;
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66 typedef const_iterator iterator;
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67 typedef reverse_iterator<const_iterator> const_reverse_iterator;
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68 typedef const_reverse_iterator reverse_iterator;
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69 typedef size_t size_type;
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70 typedef ptrdiff_t difference_type;
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71 static constexpr size_type npos = size_type(-1);
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72
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73 // 7.3, basic_string_view constructors and assignment operators
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74 constexpr basic_string_view() noexcept;
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75 constexpr basic_string_view(const basic_string_view&) noexcept = default;
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76 basic_string_view& operator=(const basic_string_view&) noexcept = default;
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77 template<class Allocator>
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78 constexpr basic_string_view(const charT* str);
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79 constexpr basic_string_view(const charT* str, size_type len);
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80
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81 // 7.4, basic_string_view iterator support
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82 constexpr const_iterator begin() const noexcept;
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83 constexpr const_iterator end() const noexcept;
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84 constexpr const_iterator cbegin() const noexcept;
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85 constexpr const_iterator cend() const noexcept;
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86 const_reverse_iterator rbegin() const noexcept;
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87 const_reverse_iterator rend() const noexcept;
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88 const_reverse_iterator crbegin() const noexcept;
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89 const_reverse_iterator crend() const noexcept;
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90
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91 // 7.5, basic_string_view capacity
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92 constexpr size_type size() const noexcept;
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93 constexpr size_type length() const noexcept;
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94 constexpr size_type max_size() const noexcept;
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95 constexpr bool empty() const noexcept;
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96
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97 // 7.6, basic_string_view element access
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98 constexpr const_reference operator[](size_type pos) const;
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99 constexpr const_reference at(size_type pos) const;
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100 constexpr const_reference front() const;
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101 constexpr const_reference back() const;
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102 constexpr const_pointer data() const noexcept;
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103
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104 // 7.7, basic_string_view modifiers
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105 constexpr void remove_prefix(size_type n);
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106 constexpr void remove_suffix(size_type n);
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107 constexpr void swap(basic_string_view& s) noexcept;
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108
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109 size_type copy(charT* s, size_type n, size_type pos = 0) const;
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110
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111 constexpr basic_string_view substr(size_type pos = 0, size_type n = npos) const;
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112 constexpr int compare(basic_string_view s) const noexcept;
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113 constexpr int compare(size_type pos1, size_type n1, basic_string_view s) const;
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114 constexpr int compare(size_type pos1, size_type n1,
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115 basic_string_view s, size_type pos2, size_type n2) const;
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116 constexpr int compare(const charT* s) const;
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117 constexpr int compare(size_type pos1, size_type n1, const charT* s) const;
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118 constexpr int compare(size_type pos1, size_type n1,
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119 const charT* s, size_type n2) const;
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120 constexpr size_type find(basic_string_view s, size_type pos = 0) const noexcept;
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121 constexpr size_type find(charT c, size_type pos = 0) const noexcept;
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122 constexpr size_type find(const charT* s, size_type pos, size_type n) const;
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123 constexpr size_type find(const charT* s, size_type pos = 0) const;
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124 constexpr size_type rfind(basic_string_view s, size_type pos = npos) const noexcept;
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125 constexpr size_type rfind(charT c, size_type pos = npos) const noexcept;
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126 constexpr size_type rfind(const charT* s, size_type pos, size_type n) const;
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127 constexpr size_type rfind(const charT* s, size_type pos = npos) const;
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128 constexpr size_type find_first_of(basic_string_view s, size_type pos = 0) const noexcept;
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129 constexpr size_type find_first_of(charT c, size_type pos = 0) const noexcept;
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130 constexpr size_type find_first_of(const charT* s, size_type pos, size_type n) const;
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131 constexpr size_type find_first_of(const charT* s, size_type pos = 0) const;
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132 constexpr size_type find_last_of(basic_string_view s, size_type pos = npos) const noexcept;
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133 constexpr size_type find_last_of(charT c, size_type pos = npos) const noexcept;
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134 constexpr size_type find_last_of(const charT* s, size_type pos, size_type n) const;
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135 constexpr size_type find_last_of(const charT* s, size_type pos = npos) const;
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136 constexpr size_type find_first_not_of(basic_string_view s, size_type pos = 0) const noexcept;
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137 constexpr size_type find_first_not_of(charT c, size_type pos = 0) const noexcept;
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138 constexpr size_type find_first_not_of(const charT* s, size_type pos, size_type n) const;
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139 constexpr size_type find_first_not_of(const charT* s, size_type pos = 0) const;
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140 constexpr size_type find_last_not_of(basic_string_view s, size_type pos = npos) const noexcept;
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141 constexpr size_type find_last_not_of(charT c, size_type pos = npos) const noexcept;
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142 constexpr size_type find_last_not_of(const charT* s, size_type pos, size_type n) const;
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143 constexpr size_type find_last_not_of(const charT* s, size_type pos = npos) const;
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144
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145 constexpr bool starts_with(basic_string_view s) const noexcept; // C++2a
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146 constexpr bool starts_with(charT c) const noexcept; // C++2a
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147 constexpr bool starts_with(const charT* s) const; // C++2a
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148 constexpr bool ends_with(basic_string_view s) const noexcept; // C++2a
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149 constexpr bool ends_with(charT c) const noexcept; // C++2a
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150 constexpr bool ends_with(const charT* s) const; // C++2a
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151
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152 private:
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153 const_pointer data_; // exposition only
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154 size_type size_; // exposition only
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155 };
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156
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157 // 7.11, Hash support
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158 template <class T> struct hash;
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159 template <> struct hash<string_view>;
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160 template <> struct hash<u16string_view>;
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161 template <> struct hash<u32string_view>;
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162 template <> struct hash<wstring_view>;
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163
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164 constexpr basic_string_view<char> operator "" sv( const char *str, size_t len ) noexcept;
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165 constexpr basic_string_view<wchar_t> operator "" sv( const wchar_t *str, size_t len ) noexcept;
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166 constexpr basic_string_view<char16_t> operator "" sv( const char16_t *str, size_t len ) noexcept;
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167 constexpr basic_string_view<char32_t> operator "" sv( const char32_t *str, size_t len ) noexcept;
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168
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169 } // namespace std
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170
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171
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172 */
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173
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174 #include <__config>
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175 #include <__string>
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176 #include <iosfwd>
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177 #include <algorithm>
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178 #include <iterator>
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179 #include <limits>
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180 #include <stdexcept>
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181 #include <version>
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182 #include <__debug>
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183
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184 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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185 #pragma GCC system_header
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186 #endif
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187
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188 _LIBCPP_PUSH_MACROS
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189 #include <__undef_macros>
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190
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191
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192 _LIBCPP_BEGIN_NAMESPACE_STD
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193
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194 template<class _CharT, class _Traits = char_traits<_CharT> >
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195 class _LIBCPP_TEMPLATE_VIS basic_string_view {
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196 public:
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197 // types
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198 typedef _Traits traits_type;
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199 typedef _CharT value_type;
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200 typedef _CharT* pointer;
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201 typedef const _CharT* const_pointer;
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202 typedef _CharT& reference;
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203 typedef const _CharT& const_reference;
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204 typedef const_pointer const_iterator; // See [string.view.iterators]
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205 typedef const_iterator iterator;
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206 typedef _VSTD::reverse_iterator<const_iterator> const_reverse_iterator;
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207 typedef const_reverse_iterator reverse_iterator;
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208 typedef size_t size_type;
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209 typedef ptrdiff_t difference_type;
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210 static _LIBCPP_CONSTEXPR const size_type npos = -1; // size_type(-1);
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211
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212 static_assert((!is_array<value_type>::value), "Character type of basic_string_view must not be an array");
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213 static_assert(( is_standard_layout<value_type>::value), "Character type of basic_string_view must be standard-layout");
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214 static_assert(( is_trivial<value_type>::value), "Character type of basic_string_view must be trivial");
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215 static_assert((is_same<_CharT, typename traits_type::char_type>::value),
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216 "traits_type::char_type must be the same type as CharT");
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217
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218 // [string.view.cons], construct/copy
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219 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
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220 basic_string_view() _NOEXCEPT : __data (nullptr), __size(0) {}
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221
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222 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
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223 basic_string_view(const basic_string_view&) _NOEXCEPT = default;
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224
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225 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
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226 basic_string_view& operator=(const basic_string_view&) _NOEXCEPT = default;
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227
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228 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
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229 basic_string_view(const _CharT* __s, size_type __len) _NOEXCEPT
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230 : __data(__s), __size(__len)
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231 {
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232 #if _LIBCPP_STD_VER > 11
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233 _LIBCPP_ASSERT(__len == 0 || __s != nullptr, "string_view::string_view(_CharT *, size_t): received nullptr");
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234 #endif
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235 }
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236
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237 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
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238 basic_string_view(const _CharT* __s)
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239 : __data(__s), __size(std::__char_traits_length_checked<_Traits>(__s)) {}
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240
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241 // [string.view.iterators], iterators
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242 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
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243 const_iterator begin() const _NOEXCEPT { return cbegin(); }
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244
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245 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
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246 const_iterator end() const _NOEXCEPT { return cend(); }
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247
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248 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
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249 const_iterator cbegin() const _NOEXCEPT { return __data; }
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250
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251 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
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252 const_iterator cend() const _NOEXCEPT { return __data + __size; }
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253
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254 _LIBCPP_CONSTEXPR_AFTER_CXX14 _LIBCPP_INLINE_VISIBILITY
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255 const_reverse_iterator rbegin() const _NOEXCEPT { return const_reverse_iterator(cend()); }
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256
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257 _LIBCPP_CONSTEXPR_AFTER_CXX14 _LIBCPP_INLINE_VISIBILITY
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258 const_reverse_iterator rend() const _NOEXCEPT { return const_reverse_iterator(cbegin()); }
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259
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260 _LIBCPP_CONSTEXPR_AFTER_CXX14 _LIBCPP_INLINE_VISIBILITY
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261 const_reverse_iterator crbegin() const _NOEXCEPT { return const_reverse_iterator(cend()); }
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262
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263 _LIBCPP_CONSTEXPR_AFTER_CXX14 _LIBCPP_INLINE_VISIBILITY
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264 const_reverse_iterator crend() const _NOEXCEPT { return const_reverse_iterator(cbegin()); }
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265
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266 // [string.view.capacity], capacity
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267 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
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268 size_type size() const _NOEXCEPT { return __size; }
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269
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270 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
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271 size_type length() const _NOEXCEPT { return __size; }
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272
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273 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
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274 size_type max_size() const _NOEXCEPT { return numeric_limits<size_type>::max(); }
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275
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276 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
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277 bool empty() const _NOEXCEPT { return __size == 0; }
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278
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279 // [string.view.access], element access
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280 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
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281 const_reference operator[](size_type __pos) const _NOEXCEPT { return __data[__pos]; }
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282
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283 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
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284 const_reference at(size_type __pos) const
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285 {
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286 return __pos >= size()
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287 ? (__throw_out_of_range("string_view::at"), __data[0])
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288 : __data[__pos];
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289 }
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290
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291 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
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292 const_reference front() const _NOEXCEPT
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293 {
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294 return _LIBCPP_ASSERT(!empty(), "string_view::front(): string is empty"), __data[0];
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295 }
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296
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297 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
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298 const_reference back() const _NOEXCEPT
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299 {
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300 return _LIBCPP_ASSERT(!empty(), "string_view::back(): string is empty"), __data[__size-1];
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301 }
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302
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303 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
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304 const_pointer data() const _NOEXCEPT { return __data; }
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305
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306 // [string.view.modifiers], modifiers:
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307 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
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308 void remove_prefix(size_type __n) _NOEXCEPT
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309 {
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310 _LIBCPP_ASSERT(__n <= size(), "remove_prefix() can't remove more than size()");
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311 __data += __n;
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312 __size -= __n;
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313 }
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314
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315 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
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316 void remove_suffix(size_type __n) _NOEXCEPT
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317 {
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318 _LIBCPP_ASSERT(__n <= size(), "remove_suffix() can't remove more than size()");
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319 __size -= __n;
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320 }
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321
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322 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
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323 void swap(basic_string_view& __other) _NOEXCEPT
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324 {
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325 const value_type *__p = __data;
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326 __data = __other.__data;
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327 __other.__data = __p;
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328
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329 size_type __sz = __size;
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330 __size = __other.__size;
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331 __other.__size = __sz;
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332 }
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333
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334 _LIBCPP_INLINE_VISIBILITY
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335 size_type copy(_CharT* __s, size_type __n, size_type __pos = 0) const
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336 {
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337 if (__pos > size())
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338 __throw_out_of_range("string_view::copy");
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339 size_type __rlen = _VSTD::min(__n, size() - __pos);
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340 _Traits::copy(__s, data() + __pos, __rlen);
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341 return __rlen;
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342 }
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343
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344 _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
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345 basic_string_view substr(size_type __pos = 0, size_type __n = npos) const
|
|
|
346 {
|
|
|
347 return __pos > size()
|
|
|
348 ? (__throw_out_of_range("string_view::substr"), basic_string_view())
|
|
|
349 : basic_string_view(data() + __pos, _VSTD::min(__n, size() - __pos));
|
|
|
350 }
|
|
|
351
|
|
|
352 _LIBCPP_CONSTEXPR_AFTER_CXX11 int compare(basic_string_view __sv) const _NOEXCEPT
|
|
|
353 {
|
|
|
354 size_type __rlen = _VSTD::min( size(), __sv.size());
|
|
|
355 int __retval = _Traits::compare(data(), __sv.data(), __rlen);
|
|
|
356 if ( __retval == 0 ) // first __rlen chars matched
|
|
|
357 __retval = size() == __sv.size() ? 0 : ( size() < __sv.size() ? -1 : 1 );
|
|
|
358 return __retval;
|
|
|
359 }
|
|
|
360
|
|
|
361 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
362 int compare(size_type __pos1, size_type __n1, basic_string_view __sv) const
|
|
|
363 {
|
|
|
364 return substr(__pos1, __n1).compare(__sv);
|
|
|
365 }
|
|
|
366
|
|
|
367 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
368 int compare( size_type __pos1, size_type __n1,
|
|
|
369 basic_string_view __sv, size_type __pos2, size_type __n2) const
|
|
|
370 {
|
|
|
371 return substr(__pos1, __n1).compare(__sv.substr(__pos2, __n2));
|
|
|
372 }
|
|
|
373
|
|
|
374 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
375 int compare(const _CharT* __s) const _NOEXCEPT
|
|
|
376 {
|
|
|
377 return compare(basic_string_view(__s));
|
|
|
378 }
|
|
|
379
|
|
|
380 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
381 int compare(size_type __pos1, size_type __n1, const _CharT* __s) const
|
|
|
382 {
|
|
|
383 return substr(__pos1, __n1).compare(basic_string_view(__s));
|
|
|
384 }
|
|
|
385
|
|
|
386 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
387 int compare(size_type __pos1, size_type __n1, const _CharT* __s, size_type __n2) const
|
|
|
388 {
|
|
|
389 return substr(__pos1, __n1).compare(basic_string_view(__s, __n2));
|
|
|
390 }
|
|
|
391
|
|
|
392 // find
|
|
|
393 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
394 size_type find(basic_string_view __s, size_type __pos = 0) const _NOEXCEPT
|
|
|
395 {
|
|
|
396 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find(): received nullptr");
|
|
|
397 return __str_find<value_type, size_type, traits_type, npos>
|
|
|
398 (data(), size(), __s.data(), __pos, __s.size());
|
|
|
399 }
|
|
|
400
|
|
|
401 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
402 size_type find(_CharT __c, size_type __pos = 0) const _NOEXCEPT
|
|
|
403 {
|
|
|
404 return __str_find<value_type, size_type, traits_type, npos>
|
|
|
405 (data(), size(), __c, __pos);
|
|
|
406 }
|
|
|
407
|
|
|
408 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
409 size_type find(const _CharT* __s, size_type __pos, size_type __n) const
|
|
|
410 {
|
|
|
411 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find(): received nullptr");
|
|
|
412 return __str_find<value_type, size_type, traits_type, npos>
|
|
|
413 (data(), size(), __s, __pos, __n);
|
|
|
414 }
|
|
|
415
|
|
|
416 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
417 size_type find(const _CharT* __s, size_type __pos = 0) const
|
|
|
418 {
|
|
|
419 _LIBCPP_ASSERT(__s != nullptr, "string_view::find(): received nullptr");
|
|
|
420 return __str_find<value_type, size_type, traits_type, npos>
|
|
|
421 (data(), size(), __s, __pos, traits_type::length(__s));
|
|
|
422 }
|
|
|
423
|
|
|
424 // rfind
|
|
|
425 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
426 size_type rfind(basic_string_view __s, size_type __pos = npos) const _NOEXCEPT
|
|
|
427 {
|
|
|
428 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find(): received nullptr");
|
|
|
429 return __str_rfind<value_type, size_type, traits_type, npos>
|
|
|
430 (data(), size(), __s.data(), __pos, __s.size());
|
|
|
431 }
|
|
|
432
|
|
|
433 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
434 size_type rfind(_CharT __c, size_type __pos = npos) const _NOEXCEPT
|
|
|
435 {
|
|
|
436 return __str_rfind<value_type, size_type, traits_type, npos>
|
|
|
437 (data(), size(), __c, __pos);
|
|
|
438 }
|
|
|
439
|
|
|
440 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
441 size_type rfind(const _CharT* __s, size_type __pos, size_type __n) const
|
|
|
442 {
|
|
|
443 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::rfind(): received nullptr");
|
|
|
444 return __str_rfind<value_type, size_type, traits_type, npos>
|
|
|
445 (data(), size(), __s, __pos, __n);
|
|
|
446 }
|
|
|
447
|
|
|
448 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
449 size_type rfind(const _CharT* __s, size_type __pos=npos) const
|
|
|
450 {
|
|
|
451 _LIBCPP_ASSERT(__s != nullptr, "string_view::rfind(): received nullptr");
|
|
|
452 return __str_rfind<value_type, size_type, traits_type, npos>
|
|
|
453 (data(), size(), __s, __pos, traits_type::length(__s));
|
|
|
454 }
|
|
|
455
|
|
|
456 // find_first_of
|
|
|
457 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
458 size_type find_first_of(basic_string_view __s, size_type __pos = 0) const _NOEXCEPT
|
|
|
459 {
|
|
|
460 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_first_of(): received nullptr");
|
|
|
461 return __str_find_first_of<value_type, size_type, traits_type, npos>
|
|
|
462 (data(), size(), __s.data(), __pos, __s.size());
|
|
|
463 }
|
|
|
464
|
|
|
465 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
466 size_type find_first_of(_CharT __c, size_type __pos = 0) const _NOEXCEPT
|
|
|
467 { return find(__c, __pos); }
|
|
|
468
|
|
|
469 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
470 size_type find_first_of(const _CharT* __s, size_type __pos, size_type __n) const
|
|
|
471 {
|
|
|
472 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_first_of(): received nullptr");
|
|
|
473 return __str_find_first_of<value_type, size_type, traits_type, npos>
|
|
|
474 (data(), size(), __s, __pos, __n);
|
|
|
475 }
|
|
|
476
|
|
|
477 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
478 size_type find_first_of(const _CharT* __s, size_type __pos=0) const
|
|
|
479 {
|
|
|
480 _LIBCPP_ASSERT(__s != nullptr, "string_view::find_first_of(): received nullptr");
|
|
|
481 return __str_find_first_of<value_type, size_type, traits_type, npos>
|
|
|
482 (data(), size(), __s, __pos, traits_type::length(__s));
|
|
|
483 }
|
|
|
484
|
|
|
485 // find_last_of
|
|
|
486 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
487 size_type find_last_of(basic_string_view __s, size_type __pos=npos) const _NOEXCEPT
|
|
|
488 {
|
|
|
489 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_last_of(): received nullptr");
|
|
|
490 return __str_find_last_of<value_type, size_type, traits_type, npos>
|
|
|
491 (data(), size(), __s.data(), __pos, __s.size());
|
|
|
492 }
|
|
|
493
|
|
|
494 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
495 size_type find_last_of(_CharT __c, size_type __pos = npos) const _NOEXCEPT
|
|
|
496 { return rfind(__c, __pos); }
|
|
|
497
|
|
|
498 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
499 size_type find_last_of(const _CharT* __s, size_type __pos, size_type __n) const
|
|
|
500 {
|
|
|
501 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_last_of(): received nullptr");
|
|
|
502 return __str_find_last_of<value_type, size_type, traits_type, npos>
|
|
|
503 (data(), size(), __s, __pos, __n);
|
|
|
504 }
|
|
|
505
|
|
|
506 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
507 size_type find_last_of(const _CharT* __s, size_type __pos=npos) const
|
|
|
508 {
|
|
|
509 _LIBCPP_ASSERT(__s != nullptr, "string_view::find_last_of(): received nullptr");
|
|
|
510 return __str_find_last_of<value_type, size_type, traits_type, npos>
|
|
|
511 (data(), size(), __s, __pos, traits_type::length(__s));
|
|
|
512 }
|
|
|
513
|
|
|
514 // find_first_not_of
|
|
|
515 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
516 size_type find_first_not_of(basic_string_view __s, size_type __pos=0) const _NOEXCEPT
|
|
|
517 {
|
|
|
518 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_first_not_of(): received nullptr");
|
|
|
519 return __str_find_first_not_of<value_type, size_type, traits_type, npos>
|
|
|
520 (data(), size(), __s.data(), __pos, __s.size());
|
|
|
521 }
|
|
|
522
|
|
|
523 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
524 size_type find_first_not_of(_CharT __c, size_type __pos=0) const _NOEXCEPT
|
|
|
525 {
|
|
|
526 return __str_find_first_not_of<value_type, size_type, traits_type, npos>
|
|
|
527 (data(), size(), __c, __pos);
|
|
|
528 }
|
|
|
529
|
|
|
530 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
531 size_type find_first_not_of(const _CharT* __s, size_type __pos, size_type __n) const
|
|
|
532 {
|
|
|
533 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_first_not_of(): received nullptr");
|
|
|
534 return __str_find_first_not_of<value_type, size_type, traits_type, npos>
|
|
|
535 (data(), size(), __s, __pos, __n);
|
|
|
536 }
|
|
|
537
|
|
|
538 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
539 size_type find_first_not_of(const _CharT* __s, size_type __pos=0) const
|
|
|
540 {
|
|
|
541 _LIBCPP_ASSERT(__s != nullptr, "string_view::find_first_not_of(): received nullptr");
|
|
|
542 return __str_find_first_not_of<value_type, size_type, traits_type, npos>
|
|
|
543 (data(), size(), __s, __pos, traits_type::length(__s));
|
|
|
544 }
|
|
|
545
|
|
|
546 // find_last_not_of
|
|
|
547 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
548 size_type find_last_not_of(basic_string_view __s, size_type __pos=npos) const _NOEXCEPT
|
|
|
549 {
|
|
|
550 _LIBCPP_ASSERT(__s.size() == 0 || __s.data() != nullptr, "string_view::find_last_not_of(): received nullptr");
|
|
|
551 return __str_find_last_not_of<value_type, size_type, traits_type, npos>
|
|
|
552 (data(), size(), __s.data(), __pos, __s.size());
|
|
|
553 }
|
|
|
554
|
|
|
555 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
556 size_type find_last_not_of(_CharT __c, size_type __pos=npos) const _NOEXCEPT
|
|
|
557 {
|
|
|
558 return __str_find_last_not_of<value_type, size_type, traits_type, npos>
|
|
|
559 (data(), size(), __c, __pos);
|
|
|
560 }
|
|
|
561
|
|
|
562 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
563 size_type find_last_not_of(const _CharT* __s, size_type __pos, size_type __n) const
|
|
|
564 {
|
|
|
565 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string_view::find_last_not_of(): received nullptr");
|
|
|
566 return __str_find_last_not_of<value_type, size_type, traits_type, npos>
|
|
|
567 (data(), size(), __s, __pos, __n);
|
|
|
568 }
|
|
|
569
|
|
|
570 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
571 size_type find_last_not_of(const _CharT* __s, size_type __pos=npos) const
|
|
|
572 {
|
|
|
573 _LIBCPP_ASSERT(__s != nullptr, "string_view::find_last_not_of(): received nullptr");
|
|
|
574 return __str_find_last_not_of<value_type, size_type, traits_type, npos>
|
|
|
575 (data(), size(), __s, __pos, traits_type::length(__s));
|
|
|
576 }
|
|
|
577
|
|
|
578 #if _LIBCPP_STD_VER > 17
|
|
|
579 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
580 bool starts_with(basic_string_view __s) const _NOEXCEPT
|
|
|
581 { return size() >= __s.size() && compare(0, __s.size(), __s) == 0; }
|
|
|
582
|
|
|
583 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
584 bool starts_with(value_type __c) const _NOEXCEPT
|
|
|
585 { return !empty() && _Traits::eq(front(), __c); }
|
|
|
586
|
|
|
587 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
588 bool starts_with(const value_type* __s) const _NOEXCEPT
|
|
|
589 { return starts_with(basic_string_view(__s)); }
|
|
|
590
|
|
|
591 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
592 bool ends_with(basic_string_view __s) const _NOEXCEPT
|
|
|
593 { return size() >= __s.size() && compare(size() - __s.size(), npos, __s) == 0; }
|
|
|
594
|
|
|
595 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
596 bool ends_with(value_type __c) const _NOEXCEPT
|
|
|
597 { return !empty() && _Traits::eq(back(), __c); }
|
|
|
598
|
|
|
599 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
600 bool ends_with(const value_type* __s) const _NOEXCEPT
|
|
|
601 { return ends_with(basic_string_view(__s)); }
|
|
|
602 #endif
|
|
|
603
|
|
|
604 private:
|
|
|
605 const value_type* __data;
|
|
|
606 size_type __size;
|
|
|
607 };
|
|
|
608
|
|
|
609
|
|
|
610 // [string.view.comparison]
|
|
|
611 // operator ==
|
|
|
612 template<class _CharT, class _Traits>
|
|
|
613 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
614 bool operator==(basic_string_view<_CharT, _Traits> __lhs,
|
|
|
615 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
|
|
|
616 {
|
|
|
617 if ( __lhs.size() != __rhs.size()) return false;
|
|
|
618 return __lhs.compare(__rhs) == 0;
|
|
|
619 }
|
|
|
620
|
|
|
621 template<class _CharT, class _Traits>
|
|
|
622 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
623 bool operator==(basic_string_view<_CharT, _Traits> __lhs,
|
|
|
624 typename common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
|
|
|
625 {
|
|
|
626 if ( __lhs.size() != __rhs.size()) return false;
|
|
|
627 return __lhs.compare(__rhs) == 0;
|
|
|
628 }
|
|
|
629
|
|
|
630 template<class _CharT, class _Traits>
|
|
|
631 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
632 bool operator==(typename common_type<basic_string_view<_CharT, _Traits> >::type __lhs,
|
|
|
633 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
|
|
|
634 {
|
|
|
635 if ( __lhs.size() != __rhs.size()) return false;
|
|
|
636 return __lhs.compare(__rhs) == 0;
|
|
|
637 }
|
|
|
638
|
|
|
639
|
|
|
640 // operator !=
|
|
|
641 template<class _CharT, class _Traits>
|
|
|
642 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
643 bool operator!=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
|
|
|
644 {
|
|
|
645 if ( __lhs.size() != __rhs.size())
|
|
|
646 return true;
|
|
|
647 return __lhs.compare(__rhs) != 0;
|
|
|
648 }
|
|
|
649
|
|
|
650 template<class _CharT, class _Traits>
|
|
|
651 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
652 bool operator!=(basic_string_view<_CharT, _Traits> __lhs,
|
|
|
653 typename common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
|
|
|
654 {
|
|
|
655 if ( __lhs.size() != __rhs.size())
|
|
|
656 return true;
|
|
|
657 return __lhs.compare(__rhs) != 0;
|
|
|
658 }
|
|
|
659
|
|
|
660 template<class _CharT, class _Traits>
|
|
|
661 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
662 bool operator!=(typename common_type<basic_string_view<_CharT, _Traits> >::type __lhs,
|
|
|
663 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
|
|
|
664 {
|
|
|
665 if ( __lhs.size() != __rhs.size())
|
|
|
666 return true;
|
|
|
667 return __lhs.compare(__rhs) != 0;
|
|
|
668 }
|
|
|
669
|
|
|
670
|
|
|
671 // operator <
|
|
|
672 template<class _CharT, class _Traits>
|
|
|
673 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
674 bool operator<(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
|
|
|
675 {
|
|
|
676 return __lhs.compare(__rhs) < 0;
|
|
|
677 }
|
|
|
678
|
|
|
679 template<class _CharT, class _Traits>
|
|
|
680 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
681 bool operator<(basic_string_view<_CharT, _Traits> __lhs,
|
|
|
682 typename common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
|
|
|
683 {
|
|
|
684 return __lhs.compare(__rhs) < 0;
|
|
|
685 }
|
|
|
686
|
|
|
687 template<class _CharT, class _Traits>
|
|
|
688 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
689 bool operator<(typename common_type<basic_string_view<_CharT, _Traits> >::type __lhs,
|
|
|
690 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
|
|
|
691 {
|
|
|
692 return __lhs.compare(__rhs) < 0;
|
|
|
693 }
|
|
|
694
|
|
|
695
|
|
|
696 // operator >
|
|
|
697 template<class _CharT, class _Traits>
|
|
|
698 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
699 bool operator> (basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
|
|
|
700 {
|
|
|
701 return __lhs.compare(__rhs) > 0;
|
|
|
702 }
|
|
|
703
|
|
|
704 template<class _CharT, class _Traits>
|
|
|
705 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
706 bool operator>(basic_string_view<_CharT, _Traits> __lhs,
|
|
|
707 typename common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
|
|
|
708 {
|
|
|
709 return __lhs.compare(__rhs) > 0;
|
|
|
710 }
|
|
|
711
|
|
|
712 template<class _CharT, class _Traits>
|
|
|
713 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
714 bool operator>(typename common_type<basic_string_view<_CharT, _Traits> >::type __lhs,
|
|
|
715 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
|
|
|
716 {
|
|
|
717 return __lhs.compare(__rhs) > 0;
|
|
|
718 }
|
|
|
719
|
|
|
720
|
|
|
721 // operator <=
|
|
|
722 template<class _CharT, class _Traits>
|
|
|
723 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
724 bool operator<=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
|
|
|
725 {
|
|
|
726 return __lhs.compare(__rhs) <= 0;
|
|
|
727 }
|
|
|
728
|
|
|
729 template<class _CharT, class _Traits>
|
|
|
730 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
731 bool operator<=(basic_string_view<_CharT, _Traits> __lhs,
|
|
|
732 typename common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
|
|
|
733 {
|
|
|
734 return __lhs.compare(__rhs) <= 0;
|
|
|
735 }
|
|
|
736
|
|
|
737 template<class _CharT, class _Traits>
|
|
|
738 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
739 bool operator<=(typename common_type<basic_string_view<_CharT, _Traits> >::type __lhs,
|
|
|
740 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
|
|
|
741 {
|
|
|
742 return __lhs.compare(__rhs) <= 0;
|
|
|
743 }
|
|
|
744
|
|
|
745
|
|
|
746 // operator >=
|
|
|
747 template<class _CharT, class _Traits>
|
|
|
748 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
749 bool operator>=(basic_string_view<_CharT, _Traits> __lhs, basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
|
|
|
750 {
|
|
|
751 return __lhs.compare(__rhs) >= 0;
|
|
|
752 }
|
|
|
753
|
|
|
754
|
|
|
755 template<class _CharT, class _Traits>
|
|
|
756 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
757 bool operator>=(basic_string_view<_CharT, _Traits> __lhs,
|
|
|
758 typename common_type<basic_string_view<_CharT, _Traits> >::type __rhs) _NOEXCEPT
|
|
|
759 {
|
|
|
760 return __lhs.compare(__rhs) >= 0;
|
|
|
761 }
|
|
|
762
|
|
|
763 template<class _CharT, class _Traits>
|
|
|
764 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
|
765 bool operator>=(typename common_type<basic_string_view<_CharT, _Traits> >::type __lhs,
|
|
|
766 basic_string_view<_CharT, _Traits> __rhs) _NOEXCEPT
|
|
|
767 {
|
|
|
768 return __lhs.compare(__rhs) >= 0;
|
|
|
769 }
|
|
|
770
|
|
|
771
|
|
|
772 template<class _CharT, class _Traits>
|
|
|
773 basic_ostream<_CharT, _Traits>&
|
|
|
774 operator<<(basic_ostream<_CharT, _Traits>& __os,
|
|
|
775 basic_string_view<_CharT, _Traits> __str);
|
|
|
776
|
|
|
777 typedef basic_string_view<char> string_view;
|
|
|
778 #ifndef _LIBCPP_NO_HAS_CHAR8_T
|
|
|
779 typedef basic_string_view<char8_t> u8string_view;
|
|
|
780 #endif
|
|
|
781 typedef basic_string_view<char16_t> u16string_view;
|
|
|
782 typedef basic_string_view<char32_t> u32string_view;
|
|
|
783 typedef basic_string_view<wchar_t> wstring_view;
|
|
|
784
|
|
|
785 // [string.view.hash]
|
|
|
786 template<class _CharT>
|
|
|
787 struct _LIBCPP_TEMPLATE_VIS hash<basic_string_view<_CharT, char_traits<_CharT> > >
|
|
|
788 : public unary_function<basic_string_view<_CharT, char_traits<_CharT> >, size_t>
|
|
|
789 {
|
|
|
790 _LIBCPP_INLINE_VISIBILITY
|
|
|
791 size_t operator()(const basic_string_view<_CharT, char_traits<_CharT> > __val) const _NOEXCEPT {
|
|
|
792 return __do_string_hash(__val.data(), __val.data() + __val.size());
|
|
|
793 }
|
|
|
794 };
|
|
|
795
|
|
|
796
|
|
|
797 #if _LIBCPP_STD_VER > 11
|
|
|
798 inline namespace literals
|
|
|
799 {
|
|
|
800 inline namespace string_view_literals
|
|
|
801 {
|
|
|
802 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
|
|
|
803 basic_string_view<char> operator "" sv(const char *__str, size_t __len) _NOEXCEPT
|
|
|
804 {
|
|
|
805 return basic_string_view<char> (__str, __len);
|
|
|
806 }
|
|
|
807
|
|
|
808 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
|
|
|
809 basic_string_view<wchar_t> operator "" sv(const wchar_t *__str, size_t __len) _NOEXCEPT
|
|
|
810 {
|
|
|
811 return basic_string_view<wchar_t> (__str, __len);
|
|
|
812 }
|
|
|
813
|
|
|
814 #ifndef _LIBCPP_NO_HAS_CHAR8_T
|
|
|
815 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
|
|
|
816 basic_string_view<char8_t> operator "" sv(const char8_t *__str, size_t __len) _NOEXCEPT
|
|
|
817 {
|
|
|
818 return basic_string_view<char8_t> (__str, __len);
|
|
|
819 }
|
|
|
820 #endif
|
|
|
821
|
|
|
822 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
|
|
|
823 basic_string_view<char16_t> operator "" sv(const char16_t *__str, size_t __len) _NOEXCEPT
|
|
|
824 {
|
|
|
825 return basic_string_view<char16_t> (__str, __len);
|
|
|
826 }
|
|
|
827
|
|
|
828 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
|
|
|
829 basic_string_view<char32_t> operator "" sv(const char32_t *__str, size_t __len) _NOEXCEPT
|
|
|
830 {
|
|
|
831 return basic_string_view<char32_t> (__str, __len);
|
|
|
832 }
|
|
|
833 }
|
|
|
834 }
|
|
|
835 #endif
|
|
|
836 _LIBCPP_END_NAMESPACE_STD
|
|
|
837
|
|
|
838 _LIBCPP_POP_MACROS
|
|
|
839
|
|
|
840 #endif // _LIBCPP_STRING_VIEW
|
