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@ -1,586 +0,0 @@ |
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#pragma once |
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#ifndef _SHARED_STRING_H_INCLUDED_ |
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#define _SHARED_STRING_H_INCLUDED_ |
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/**
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* basic_shared_string |
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* |
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* Copyright (c) 2015 Scott Schanel http://github.com/sschanel/shared_string
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* |
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* License: MIT License |
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* |
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* Uses std::shared_ptr internally to keep memory allocation to a minimum. |
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* This is a boost-less implementation that does not use boost::flyweights. |
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* That means that if you try hard enough you can outsmart it and do |
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* things very ineffeciently. |
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* |
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* But! If you embrace it, you get all the same methods that basic_string |
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* has (as of C++11), and you get a true shared string and it's thread-safe. |
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* Missing methods from basic_string: reserve(), capacity(), shrink_to_fit(). |
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* append(), assign(), insert(), erase(), replace(), push_front(), push_back(), |
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* all methods that return a non-const iterator. Almost all of the implemented |
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* methods are thin wrappers around the shared string. |
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* |
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* If you need those methods, make a copy of the internal string by calling |
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* str() and work on that temporary string. |
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* |
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* You still get operator=(). And clear(). |
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* |
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* |
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* |
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*/ |
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#include <string> |
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#include <memory> |
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#include <functional> |
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template <typename CharT, |
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class Traits = std::char_traits<CharT>, |
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class Allocator = std::allocator < CharT > |
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> |
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class basic_shared_string { |
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public: |
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typedef std::basic_string<CharT, Traits, Allocator> string_type; |
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typedef typename string_type::const_iterator const_iterator; |
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typedef typename string_type::const_reverse_iterator const_reverse_iterator; |
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typedef typename string_type::size_type size_type; |
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private: |
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std::shared_ptr<const string_type> string_; |
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void replace_contents(string_type&& newString) { |
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string_ = std::make_shared<const string_type>(std::move(newString)); |
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} |
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public: |
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static const size_type npos = (size_t)-1; |
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const string_type& str() const { |
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static const string_type empty; |
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if (string_.get() != nullptr) { |
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return *(string_.get()); |
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} |
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return empty; |
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} |
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operator const string_type&() { |
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return str(); |
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} |
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basic_shared_string() { |
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} |
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basic_shared_string(const CharT * s) { |
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replace_contents(string_type(s)); |
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} |
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basic_shared_string(const string_type& s) { |
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replace_contents(string_type(s)); |
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} |
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basic_shared_string(string_type&& s) { |
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replace_contents(std::move(s)); |
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} |
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basic_shared_string(const basic_shared_string& s) { |
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string_ = s.string_; |
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} |
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void clear() { |
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string_ = nullptr; |
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} |
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basic_shared_string& operator=(const basic_shared_string& s) { |
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string_ = s.string_; |
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return *this; |
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} |
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basic_shared_string& operator=(const string_type& str) { |
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replace_contents(string_type(str)); |
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return *this; |
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} |
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basic_shared_string& operator=(string_type&& str) { |
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replace_contents(std::move(str)); |
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return *this; |
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} |
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basic_shared_string& operator=(const CharT* s) { |
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replace_contents(string_type(s)); |
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return *this; |
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} |
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basic_shared_string& operator=(CharT ch) { |
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replace_contents(string_type(ch)); |
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return *this; |
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} |
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basic_shared_string& operator=(std::initializer_list<CharT> ilist) { |
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replace_contents(string_type(ilist)); |
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return *this; |
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} |
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void swap(basic_shared_string& rhs) { |
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this->string_.swap(rhs.string_); |
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} |
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CharT at(size_type pos) const { |
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return str().at(pos); |
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} |
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CharT operator[](size_type pos) const { |
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return str()[pos]; |
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} |
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CharT front() const { |
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return str().front(); |
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} |
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CharT back() const { |
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return str().back(); |
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} |
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const CharT * c_str() const { |
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return str().c_str(); |
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} |
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const_iterator begin() const { |
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return str().begin(); |
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} |
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const_iterator cbegin() const { |
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return str().cbegin(); |
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} |
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const_iterator end() const { |
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return str().end(); |
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} |
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const_iterator cend() const { |
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return str().end(); |
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} |
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const_reverse_iterator rbegin() const { |
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return str().rbegin(); |
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} |
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const_reverse_iterator crbegin() const { |
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return str().crbegin(); |
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} |
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const_reverse_iterator rend() const { |
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return str().rend(); |
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} |
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const_reverse_iterator crend() const { |
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return str().crend(); |
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} |
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bool empty() const { |
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return str().empty(); |
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} |
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size_t size() const { |
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return str().size(); |
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} |
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size_t length() const { |
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return str().length(); |
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} |
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size_t max_size() const { |
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return str().max_size(); |
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} |
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size_t capacity() const { |
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return str().capacity(); |
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} |
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int compare(const string_type& rhs) const { |
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return str().compare(rhs); |
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} |
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int compare(const basic_shared_string& rhs) const { |
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return str().compare(rhs.str()); |
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} |
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int compare(size_type pos1, size_type count1, |
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const string_type& str) const { |
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return str().compare(pos1, count1, str); |
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} |
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int compare(const CharT* s) const { |
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return str().compare(s); |
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} |
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int compare(size_type pos1, size_type count1, |
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const CharT* s) const { |
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return str().compare(pos1, count1, s); |
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} |
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int compare( |
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size_type pos1, |
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size_type count1, |
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const CharT* s, |
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size_type count2) const { |
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return str().compare(pos1, count1, s, count2); |
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} |
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basic_shared_string<CharT> substr( |
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size_type pos = 0, |
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size_type count = npos) const { |
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if (pos == 0) { |
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if (count == npos) { |
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return *this; |
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} |
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else if (count >= str().size()) { |
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return *this; |
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} |
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} |
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return basic_shared_string(str().substr(pos, count)); |
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} |
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size_type copy( |
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CharT* dest, |
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size_type count, |
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size_type pos = 0) const { |
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return str().copy(dest, count, pos); |
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} |
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size_type find(const string_type& str, size_type pos = 0) const { |
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return str().find(str, pos); |
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} |
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size_type find(const CharT* s, size_type pos, size_type count) const { |
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return str().find(s, pos, count); |
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} |
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size_type find(const CharT* s, size_type pos = 0) const { |
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return str().find(s, pos); |
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} |
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size_type find(CharT ch, size_type pos = 0) const { |
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return str().find(ch, pos); |
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} |
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size_type rfind(const string_type& str, size_type pos = npos) const { |
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return str().rfind(str, pos); |
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} |
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size_type rfind(const CharT* s, size_type pos, size_type count) const { |
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return str().rfind(s, pos, count); |
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} |
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size_type rfind(const CharT* s, size_type pos = npos) const { |
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return str().rfind(s, pos); |
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} |
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size_type rfind(CharT ch, size_type pos = npos) const { |
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return str().rfind(ch, pos); |
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} |
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size_type find_first_of(const string_type& str, size_type pos = 0) const { |
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return str().find_first_of(str, pos); |
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} |
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size_type find_first_of(const CharT* s, size_type pos, size_type count) const { |
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return str().find_first_of(s, pos, count); |
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} |
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size_type find_first_of(const CharT* s, size_type pos = 0) const { |
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return str().find_first_of(s, pos); |
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} |
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size_type find_first_of(CharT ch, size_type pos = 0) const { |
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return str().find_first_of(ch, pos); |
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} |
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size_type find_first_not_of(const string_type& str, size_type pos = 0) const { |
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return str().find_first_not_of(str, pos); |
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} |
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size_type find_first_not_of(const CharT* s, size_type pos, size_type count) const { |
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return str().find_first_not_of(s, pos, count); |
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} |
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size_type find_first_not_of(const CharT* s, size_type pos = 0) const { |
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return str().find_first_not_of(s, pos); |
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} |
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size_type find_first_not_of(CharT ch, size_type pos = 0) const { |
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return str().find_first_not_of(ch, pos); |
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} |
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size_type find_last_of(const string_type& str, size_type pos = npos) const { |
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return str().find_last_of(str, pos); |
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} |
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size_type find_last_of(const CharT* s, size_type pos, size_type count) const { |
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return str().find_last_of(s, pos, count); |
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} |
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size_type find_last_of(const CharT* s, size_type pos = npos) const { |
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return str().find_last_of(s, pos); |
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} |
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size_type find_last_of(CharT ch, size_type pos = npos) const { |
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return str().find_last_of(ch, pos); |
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} |
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size_type find_last_not_of(const string_type& str, size_type pos = npos) const { |
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return str().find_last_not_of(str, pos); |
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} |
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size_type find_last_not_of(const CharT* s, size_type pos, size_type count) const { |
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return str().find_last_not_of(s, pos, count); |
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} |
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size_type find_last_not_of(const CharT* s, size_type pos = npos) const { |
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return str().find_last_not_of(s, pos); |
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} |
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size_type find_last_not_of(CharT ch, size_type pos = npos) const { |
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return str().find_last_not_of(ch, pos); |
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} |
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}; |
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template< class CharT, class Traits, class Alloc > |
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bool operator==( |
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const basic_shared_string<CharT, Traits, Alloc>& lhs, |
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const basic_shared_string<CharT, Traits, Alloc>& rhs) { |
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return lhs.str() == rhs.str(); |
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} |
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template< class CharT, class Traits, class Alloc > |
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bool operator!=( |
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const basic_shared_string<CharT, Traits, Alloc>& lhs, |
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const basic_shared_string<CharT, Traits, Alloc>& rhs) { |
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return lhs.str() != rhs.str(); |
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} |
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template< class CharT, class Traits, class Alloc > |
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bool operator<( |
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const basic_shared_string<CharT, Traits, Alloc>& lhs, |
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const basic_shared_string<CharT, Traits, Alloc>& rhs) { |
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return lhs.str() < rhs.str(); |
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} |
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template< class CharT, class Traits, class Alloc > |
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bool operator<=( |
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const basic_shared_string<CharT, Traits, Alloc>& lhs, |
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const basic_shared_string<CharT, Traits, Alloc>& rhs) { |
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return lhs.str() <= rhs.str(); |
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} |
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template< class CharT, class Traits, class Alloc > |
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bool operator>( |
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const basic_shared_string<CharT, Traits, Alloc>& lhs, |
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const basic_shared_string<CharT, Traits, Alloc>& rhs) { |
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return lhs.str() > rhs.str(); |
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} |
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template< class CharT, class Traits, class Alloc > |
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bool operator>=( |
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const basic_shared_string<CharT, Traits, Alloc>& lhs, |
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const basic_shared_string<CharT, Traits, Alloc>& rhs) { |
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return lhs.str() >= rhs.str(); |
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} |
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template< class CharT, class Traits, class Alloc > |
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bool operator==( |
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const CharT* lhs, |
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const basic_shared_string<CharT, Traits, Alloc>& rhs) { |
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return operator==(lhs, rhs.str()); |
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} |
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template< class CharT, class Traits, class Alloc > |
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bool operator==( |
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const basic_shared_string<CharT, Traits, Alloc>& lhs, |
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const CharT* rhs) { |
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return operator==(lhs.str(), rhs); |
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} |
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template< class CharT, class Traits, class Alloc > |
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bool operator!=(const CharT* lhs, const basic_shared_string<CharT, Traits, Alloc>& rhs) { |
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return operator!=(lhs, rhs.str()); |
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} |
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template< class CharT, class Traits, class Alloc > |
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bool operator!=(const basic_shared_string<CharT, Traits, Alloc>& lhs, const CharT* rhs) { |
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return operator!=(lhs.str(), rhs); |
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} |
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template< class CharT, class Traits, class Alloc > |
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bool operator<(const CharT* lhs, const basic_shared_string<CharT, Traits, Alloc>& rhs) { |
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return operator<(lhs, rhs.str()); |
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} |
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template< class CharT, class Traits, class Alloc > |
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bool operator<(const basic_shared_string<CharT, Traits, Alloc>& lhs, const CharT* rhs) { |
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return operator<(lhs.str(), rhs); |
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} |
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template< class CharT, class Traits, class Alloc > |
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bool operator<=(const CharT* lhs, const basic_shared_string<CharT, Traits, Alloc>& rhs) { |
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return operator<=(lhs, rhs.str()); |
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} |
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template< class CharT, class Traits, class Alloc > |
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bool operator<=(const basic_shared_string<CharT, Traits, Alloc>& lhs, const CharT* rhs) { |
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return operator<=(lhs.str(), rhs); |
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} |
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template< class CharT, class Traits, class Alloc > |
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bool operator>(const CharT* lhs, const basic_shared_string<CharT, Traits, Alloc>& rhs) { |
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return operator>(lhs, rhs.str()); |
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} |
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template< class CharT, class Traits, class Alloc > |
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bool operator>(const basic_shared_string<CharT, Traits, Alloc>& lhs, const CharT* rhs) { |
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return operator>(lhs.str(), rhs); |
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} |
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template< class CharT, class Traits, class Alloc > |
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bool operator>=(const CharT* lhs, const basic_shared_string<CharT, Traits, Alloc>& rhs) { |
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return operator>=(lhs, rhs.str()); |
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} |
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template< class CharT, class Traits, class Alloc > |
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bool operator>=(const basic_shared_string<CharT, Traits, Alloc>& lhs, const CharT* rhs) { |
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return operator>=(lhs.str(), rhs); |
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} |
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template <class CharT, class Traits, class Allocator> |
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std::basic_ostream<CharT, Traits>& operator<<( |
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std::basic_ostream<CharT, Traits>& os, |
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const basic_shared_string<CharT, Traits, Allocator>& str) { |
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return operator<<(os, str.str()); |
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} |
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template <class CharT, class Traits, class Allocator> |
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std::basic_istream<CharT, Traits>& operator>>( |
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std::basic_istream<CharT, Traits>& is, |
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basic_shared_string<CharT, Traits, Allocator>& str) { |
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std::basic_string<CharT, Traits, Allocator> temp; |
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operator>>(is, temp); |
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str = temp; |
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return is; |
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} |
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template< class CharT, class Traits, class Alloc > |
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basic_shared_string<CharT, Traits, Alloc> operator+( |
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const basic_shared_string<CharT, Traits, Alloc>& lhs, |
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const basic_shared_string<CharT, Traits, Alloc>& rhs) { |
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|
return basic_shared_string<CharT, Traits, Alloc>(operator+(lhs.str(), rhs.str())); |
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} |
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template< class CharT, class Traits, class Alloc > |
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basic_shared_string<CharT, Traits, Alloc> operator+( |
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const basic_shared_string<CharT, Traits, Alloc>& lhs, |
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const std::basic_string<CharT, Traits, Alloc>& rhs) { |
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|
return basic_shared_string<CharT, Traits, Alloc>(operator+(lhs.str(), rhs)); |
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} |
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|
template< class CharT, class Traits, class Alloc > |
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basic_shared_string<CharT, Traits, Alloc> operator+( |
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const std::basic_string<CharT, Traits, Alloc>& lhs, |
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|
const basic_shared_string<CharT, Traits, Alloc>& rhs) { |
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|
|
return basic_shared_string<CharT, Traits, Alloc>(operator+(lhs, rhs.str())); |
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} |
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|
template< class CharT, class Traits, class Alloc > |
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|
basic_shared_string<CharT, Traits, Alloc> operator+( |
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|
const CharT* lhs, |
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|
const basic_shared_string<CharT, Traits, Alloc>& rhs) { |
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|
|
return basic_shared_string<CharT, Traits, Alloc>(operator+(lhs, rhs.str())); |
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|
} |
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|
template< class CharT, class Traits, class Alloc > |
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|
basic_shared_string<CharT, Traits, Alloc> operator+( |
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|
CharT lhs, |
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|
|
const basic_shared_string<CharT, Traits, Alloc>& rhs) { |
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|
|
return basic_shared_string<CharT, Traits, Alloc>(operator+(lhs, rhs.str())); |
|
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|
|
} |
|
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|
|
template< class CharT, class Traits, class Alloc > |
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|
|
basic_shared_string<CharT, Traits, Alloc> operator+( |
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|
|
const basic_shared_string<CharT, Traits, Alloc>& lhs, |
|
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|
|
const CharT* rhs) { |
|
|
|
|
|
|
|
|
|
return basic_shared_string<CharT, Traits, Alloc>(operator+(lhs.str(), rhs)); |
|
|
|
|
} |
|
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|
|
template<class CharT, class Traits, class Alloc> |
|
|
|
|
basic_shared_string<CharT, Traits, Alloc> operator+( |
|
|
|
|
const basic_shared_string<CharT, Traits, Alloc>& lhs, |
|
|
|
|
CharT rhs) { |
|
|
|
|
|
|
|
|
|
return basic_shared_string<CharT, Traits, Alloc>(operator+(lhs.str(), rhs)); |
|
|
|
|
} |
|
|
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|
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|
|
|
namespace std { |
|
|
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|
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|
|
template <class CharT, class Traits, class Alloc> |
|
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|
|
int stoi(const basic_shared_string<CharT, Traits, Alloc>& str, std::size_t* pos = 0, int base = 10) { |
|
|
|
|
return stoi(str.str(), pos, base); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
template <class CharT, class Traits, class Alloc> |
|
|
|
|
long stol(const basic_shared_string<CharT, Traits, Alloc>& str, std::size_t* pos = 0, int base = 10) { |
|
|
|
|
return stol(str.str(), pos, base); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
template <class CharT, class Traits, class Alloc> |
|
|
|
|
long long stoll(const basic_shared_string<CharT, Traits, Alloc>& str, std::size_t* pos = 0, int base = 10) { |
|
|
|
|
return stoll(str.str(), pos, base); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
template <class CharT, class Traits, class Alloc> |
|
|
|
|
unsigned long stoul(const basic_shared_string<CharT, Traits, Alloc>& str, std::size_t* pos = 0, int base = 10) { |
|
|
|
|
return stoul(str.str(), pos, base); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
template <class CharT, class Traits, class Alloc> |
|
|
|
|
unsigned long long stoull(const basic_shared_string<CharT, Traits, Alloc>& str, std::size_t* pos = 0, int base = 10) { |
|
|
|
|
return stoull(str.str(), pos, base); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
template <class CharT, class Traits, class Alloc> |
|
|
|
|
float stof(const basic_shared_string<CharT, Traits, Alloc>& str, std::size_t* pos = 0) { |
|
|
|
|
return stof(str.str(), pos); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
template <class CharT, class Traits, class Alloc> |
|
|
|
|
double stod(const basic_shared_string<CharT, Traits, Alloc>& str, std::size_t* pos = 0) { |
|
|
|
|
return stod(str.str(), pos); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
template <class CharT, class Traits, class Alloc> |
|
|
|
|
double stold(const basic_shared_string<CharT, Traits, Alloc>& str, std::size_t* pos = 0) { |
|
|
|
|
return stold(str.str(), pos); |
|
|
|
|
} |
|
|
|
|
|
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|
|
|
template <class CharT> |
|
|
|
|
struct hash < basic_shared_string<CharT> > { |
|
|
|
|
size_t operator()(const basic_shared_string<CharT>& key) { |
|
|
|
|
return hash<std::string>()(key.str()); |
|
|
|
|
} |
|
|
|
|
}; |
|
|
|
|
} |
|
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|
|
typedef basic_shared_string<char> shared_string; |
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|
|
typedef basic_shared_string<wchar_t> shared_wstring; |
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|
|
#endif // _STRING_REF_H_INCLUDED_
|
jacqueline
1 year ago