//---------------------------------------------------------------------------//
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// Copyright (c) 2013 Kyle Lutz <kyle.r.lutz@gmail.com>
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//
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// Distributed under the Boost Software License, Version 1.0
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// See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt
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//
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// See http://boostorg.github.com/compute for more information.
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//---------------------------------------------------------------------------//
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#ifndef BOOST_COMPUTE_CONTAINER_BASIC_STRING_HPP
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#define BOOST_COMPUTE_CONTAINER_BASIC_STRING_HPP
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#include <string>
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#include <cstring>
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#include <boost/compute/cl.hpp>
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#include <boost/compute/algorithm/find.hpp>
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#include <boost/compute/algorithm/search.hpp>
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#include <boost/compute/container/vector.hpp>
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#include <boost/compute/system.hpp>
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#include <boost/compute/command_queue.hpp>
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#include <iosfwd>
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namespace boost {
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namespace compute {
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/// \class basic_string
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/// \brief A template for a dynamically-sized character sequence.
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///
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/// The \c basic_string class provides a generic template for a dynamically-
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/// sized character sequence. This is most commonly used through the \c string
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/// typedef (for \c basic_string<char>).
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///
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/// For example, to create a string on the device with its contents copied
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/// from a C-string on the host:
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/// \code
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/// boost::compute::string str("hello, world!");
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/// \endcode
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///
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/// \see \ref vector "vector<T>"
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template<class CharT, class Traits = std::char_traits<CharT> >
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class basic_string
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{
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public:
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typedef Traits traits_type;
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typedef typename Traits::char_type value_type;
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typedef size_t size_type;
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static const size_type npos = size_type(-1);
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typedef typename ::boost::compute::vector<CharT>::reference reference;
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typedef typename ::boost::compute::vector<CharT>::const_reference const_reference;
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typedef typename ::boost::compute::vector<CharT>::iterator iterator;
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typedef typename ::boost::compute::vector<CharT>::const_iterator const_iterator;
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typedef typename ::boost::compute::vector<CharT>::reverse_iterator reverse_iterator;
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typedef typename ::boost::compute::vector<CharT>::const_reverse_iterator const_reverse_iterator;
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basic_string()
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{
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}
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basic_string(size_type count, CharT ch)
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: m_data(count)
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{
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std::fill(m_data.begin(), m_data.end(), ch);
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}
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basic_string(const basic_string &other,
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size_type pos,
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size_type count = npos)
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: m_data(other.begin() + pos,
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other.begin() + (std::min)(other.size(), count))
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{
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}
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basic_string(const char *s, size_type count)
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: m_data(s, s + count)
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{
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}
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basic_string(const char *s)
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: m_data(s, s + std::strlen(s))
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{
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}
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template<class InputIterator>
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basic_string(InputIterator first, InputIterator last)
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: m_data(first, last)
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{
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}
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basic_string(const basic_string<CharT, Traits> &other)
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: m_data(other.m_data)
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{
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}
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basic_string<CharT, Traits>& operator=(const basic_string<CharT, Traits> &other)
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{
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if(this != &other){
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m_data = other.m_data;
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}
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return *this;
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}
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~basic_string()
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{
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}
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reference at(size_type pos)
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{
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return m_data.at(pos);
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}
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const_reference at(size_type pos) const
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{
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return m_data.at(pos);
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}
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reference operator[](size_type pos)
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{
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return m_data[pos];
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}
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const_reference operator[](size_type pos) const
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{
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return m_data[pos];
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}
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reference front()
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{
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return m_data.front();
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}
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const_reference front() const
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{
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return m_data.front();
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}
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reference back()
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{
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return m_data.back();
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}
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const_reference back() const
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{
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return m_data.back();
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}
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iterator begin()
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{
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return m_data.begin();
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}
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const_iterator begin() const
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{
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return m_data.begin();
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}
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const_iterator cbegin() const
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{
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return m_data.cbegin();
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}
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iterator end()
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{
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return m_data.end();
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}
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const_iterator end() const
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{
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return m_data.end();
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}
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const_iterator cend() const
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{
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return m_data.cend();
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}
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reverse_iterator rbegin()
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{
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return m_data.rbegin();
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}
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const_reverse_iterator rbegin() const
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{
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return m_data.rbegin();
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}
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const_reverse_iterator crbegin() const
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{
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return m_data.crbegin();
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}
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reverse_iterator rend()
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{
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return m_data.rend();
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}
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const_reverse_iterator rend() const
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{
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return m_data.rend();
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}
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const_reverse_iterator crend() const
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{
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return m_data.crend();
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}
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bool empty() const
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{
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return m_data.empty();
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}
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size_type size() const
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{
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return m_data.size();
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}
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size_type length() const
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{
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return m_data.size();
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}
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size_type max_size() const
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{
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return m_data.max_size();
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}
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void reserve(size_type size)
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{
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m_data.reserve(size);
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}
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size_type capacity() const
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{
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return m_data.capacity();
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}
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void shrink_to_fit()
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{
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m_data.shrink_to_fit();
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}
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void clear()
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{
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m_data.clear();
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}
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void swap(basic_string<CharT, Traits> &other)
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{
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if(this != &other)
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{
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::boost::compute::vector<CharT> temp_data(other.m_data);
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other.m_data = m_data;
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m_data = temp_data;
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}
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}
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basic_string<CharT, Traits> substr(size_type pos = 0,
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size_type count = npos) const
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{
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return basic_string<CharT, Traits>(*this, pos, count);
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}
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/// Finds the first character \p ch
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size_type find(CharT ch, size_type pos = 0) const
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{
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const_iterator iter = ::boost::compute::find(begin() + pos, end(), ch);
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if(iter == end()){
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return npos;
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}
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else {
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return static_cast<size_type>(std::distance(begin(), iter));
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}
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}
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/// Finds the first substring equal to \p str
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size_type find(basic_string& str, size_type pos = 0) const
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{
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const_iterator iter = ::boost::compute::search(begin() + pos, end(),
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str.begin(), str.end());
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if(iter == end()){
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return npos;
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}
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else {
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return static_cast<size_type>(std::distance(begin(), iter));
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}
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}
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/// Finds the first substring equal to the character string
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/// pointed to by \p s.
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/// The length of the string is determined by the first null character.
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///
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/// For example, the following code
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/// \snippet test/test_string.cpp string_find
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///
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/// will return 5 as position.
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size_type find(const char* s, size_type pos = 0) const
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{
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basic_string str(s);
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const_iterator iter = ::boost::compute::search(begin() + pos, end(),
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str.begin(), str.end());
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if(iter == end()){
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return npos;
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}
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else {
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return static_cast<size_type>(std::distance(begin(), iter));
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}
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}
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private:
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::boost::compute::vector<CharT> m_data;
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};
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template<class CharT, class Traits>
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std::ostream&
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operator<<(std::ostream& stream,
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boost::compute::basic_string<CharT, Traits>const& outStr)
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{
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command_queue queue = ::boost::compute::system::default_queue();
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boost::compute::copy(outStr.begin(),
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outStr.end(),
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std::ostream_iterator<CharT>(stream),
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queue);
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return stream;
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}
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} // end compute namespace
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} // end boost namespace
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#endif // BOOST_COMPUTE_CONTAINER_BASIC_STRING_HPP
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