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string_view.hpp
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/**
* \file string_view.hpp
*
* \brief This header contains the definition of the string_view type, as
* described by the C++17 standard.
*
* \author Matthew Rodusek (matthew.rodusek@gmail.com)
* \copyright Matthew Rodusek
*/
/*
* The MIT License (MIT)
*
* Licensed under the MIT License <http://opensource.org/licenses/MIT>.
* Copyright (c) 2016 Matthew Rodusek <http://rodusek.me>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef BPSTD_STRING_VIEW_HPP
#define BPSTD_STRING_VIEW_HPP
#include <algorithm> // std::
#include <string> // std::char_traits
#include <ostream> // std::basic_ostream
#include <cstddef> // std::size_t
#include <memory> // std::allocator
#include <stdexcept> // std::out_of_range
#include <iterator> // std::reverse_iterator
namespace bpstd { // back-port std
////////////////////////////////////////////////////////////////////////////
/// \brief A wrapper around non-owned strings.
///
/// This is an implementation of the C++17 string_view proposal
///
/// \ingroup core
////////////////////////////////////////////////////////////////////////////
template<
typename CharT,
typename Traits = std::char_traits<CharT>
>
class basic_string_view final
{
//------------------------------------------------------------------------
// Public Member Types
//------------------------------------------------------------------------
public:
using char_type = CharT;
using traits_type = Traits;
using size_type = std::size_t;
using value_type = CharT;
using reference = value_type&;
using const_reference = const value_type&;
using pointer = value_type*;
using const_pointer = const value_type*;
using iterator = const CharT*;
using const_iterator = const CharT*;
using reverse_iterator = std::reverse_iterator<iterator>;
using const_reverse_iterator = std::reverse_iterator<const_iterator>;
//------------------------------------------------------------------------
// Public Members
//------------------------------------------------------------------------
public:
static constexpr size_type npos = size_type(-1);
//------------------------------------------------------------------------
// Constructors
//------------------------------------------------------------------------
public:
/// \brief Default constructs a basic_string_view without any content
constexpr basic_string_view() noexcept;
/// \brief Constructs a basic_string_view by copying another one
///
/// \param other the string view being copied
constexpr basic_string_view(const basic_string_view& other) noexcept = default;
/// \brief Constructs a basic_string_view by moving anothe rone
///
/// \param other the string view being moved
constexpr basic_string_view(basic_string_view&& other) noexcept = default;
/// \brief Constructs a basic_string_view from a std::basic_string
///
/// \param str the string to view
template<typename Allocator>
basic_string_view(const std::basic_string<CharT,Traits,Allocator>& str) noexcept;
/// \brief Constructs a basic_string_view from an ansi-string
///
/// \param str the string to view
constexpr basic_string_view(const char_type* str) noexcept;
/// \brief Constructs a basic_string_view from an ansi string of a given size
///
/// \param str the string to view
/// \param count the size of the string
constexpr basic_string_view(const char_type* str, size_type count) noexcept;
//------------------------------------------------------------------------
// Assignment
//------------------------------------------------------------------------
public:
/// \brief Assigns a basic_string_view from an ansi-string
///
/// \param view the string to view
/// \return reference to \c (*this)
basic_string_view& operator=(const basic_string_view& view) = default;
//------------------------------------------------------------------------
// Capacity
//------------------------------------------------------------------------
public:
/// \brief Returns the length of the string, in terms of bytes
///
/// \return the length of the string, in terms of bytes
constexpr size_type size() const noexcept;
/// \copydoc basic_string_view::size
constexpr size_type length() const noexcept;
/// \brief The largest possible number of char-like objects that can be
/// referred to by a basic_string_view.
/// \return Maximum number of characters
constexpr size_type max_size() const noexcept;
/// \brief Returns whether the basic_string_view is empty
/// (i.e. whether its length is 0).
///
/// \return whether the basic_string_view is empty
constexpr bool empty() const noexcept;
//------------------------------------------------------------------------
// Element Access
//------------------------------------------------------------------------
public:
/// \brief Gets the ansi-string of the current basic_string_view
///
/// \return the ansi-string pointer
constexpr const char_type* c_str() const noexcept;
/// \brief Gets the data of the current basic_string_view
///
/// \note This is an alias of #c_str
///
/// \return the data this basic_string_view contains
constexpr const char_type* data() const noexcept;
/// \brief Accesses the element at index \p pos
///
/// \param pos the index to access
/// \return const reference to the character
constexpr const_reference operator[](size_type pos) const noexcept;
/// \brief Accesses the element at index \p pos
///
/// \param pos the index to access
/// \return const reference to the character
constexpr const_reference at(size_type pos) const;
/// \brief Access the first character of the string
///
/// \note Undefined behavior if basic_string_view is empty
///
/// \return reference to the first character of the string
constexpr const_reference front() const noexcept;
/// \brief References the last character of the string
///
/// \note Undefined behavior if basic_string_view is empty
///
/// \return reference to the last character of the string
constexpr const_reference back() const noexcept;
//------------------------------------------------------------------------
// Modifiers
//------------------------------------------------------------------------
public:
/// \brief Moves the start of the view forward by n characters.
///
/// The behavior is undefined if n > size().
///
/// \param n number of characters to remove from the start of the view
void remove_prefix(size_type n) noexcept;
/// \brief Moves the end of the view back by n characters.
///
/// The behavior is undefined if n > size().
///
/// \param n number of characters to remove from the end of the view
void remove_suffix(size_type n) noexcept;
/// \brief Exchanges the view with that of v.
///
/// \param v view to swap with
void swap(basic_string_view& v) noexcept;
//------------------------------------------------------------------------
// Conversions
//------------------------------------------------------------------------
public:
/// \brief Creates a basic_string with a copy of the content of the current view.
///
/// \tparam Allocator type used to allocate internal storage
/// \param a Allocator instance to use for allocating the new string
///
/// \return A basic_string containing a copy of the characters of the current view.
template<class Allocator = std::allocator<CharT>>
constexpr std::basic_string<CharT, Traits, Allocator>
to_string(const Allocator& a = Allocator()) const;
/// \copydoc basic_string_view::to_string
template<class Allocator>
explicit constexpr operator std::basic_string<CharT, Traits, Allocator>() const;
//------------------------------------------------------------------------
// Operations
//------------------------------------------------------------------------
public:
/// \brief Copies the substring [pos, pos + rcount) to the character string pointed
/// to by dest, where rcount is the smaller of count and size() - pos.
///
/// \param dest pointer to the destination character string
/// \param count requested substring length
/// \param pos position of the first character
size_type copy( char_type* dest,
size_type count = npos,
size_type pos = 0 ) const;
/// \brief Returns a substring of this viewed string
///
/// \param pos the position of the first character in the substring
/// \param len the length of the substring
/// \return the created substring
basic_string_view substr(size_t pos = 0, size_t len = npos) const;
//------------------------------------------------------------------------
/// \brief Compares two character sequences
///
/// \param v view to compare
/// \return negative value if this view is less than the other character
/// sequence, zero if the both character sequences are equal, positive
/// value if this view is greater than the other character sequence.
int compare(basic_string_view v) const noexcept;
/// \brief Compares two character sequences
///
/// \param pos position of the first character in this view to compare
/// \param count number of characters of this view to compare
/// \param v view to compare
/// \return negative value if this view is less than the other character
/// sequence, zero if the both character sequences are equal, positive
/// value if this view is greater than the other character sequence.
int compare(size_type pos, size_type count, basic_string_view v) const;
/// \brief Compares two character sequences
///
/// \param pos1 position of the first character in this view to compare
/// \param count1 number of characters of this view to compare
/// \param v view to compare
/// \param pos2 position of the second character in this view to compare
/// \param count2 number of characters of the given view to compare
/// \return negative value if this view is less than the other character
/// sequence, zero if the both character sequences are equal, positive
/// value if this view is greater than the other character sequence.
int compare( size_type pos1, size_type count1, basic_string_view v,
size_type pos2, size_type count2 ) const;
/// \brief Compares two character sequences
///
/// \param s pointer to the character string to compare to
/// \return negative value if this view is less than the other character
/// sequence, zero if the both character sequences are equal, positive
/// value if this view is greater than the other character sequence.
int compare(const char_type* s) const;
/// \brief Compares two character sequences
///
/// \param pos position of the first character in this view to compare
/// \param count number of characters of this view to compare
/// \param s pointer to the character string to compare to
/// \return negative value if this view is less than the other character
/// sequence, zero if the both character sequences are equal, positive
/// value if this view is greater than the other character sequence.
int compare(size_type pos, size_type count, const char_type* s) const;
/// \brief Compares two character sequences
///
/// \param pos position of the first character in this view to compare
/// \param count1 number of characters of this view to compare
/// \param s pointer to the character string to compare to
/// \param count2 number of characters of the given view to compare
/// \return negative value if this view is less than the other character
/// sequence, zero if the both character sequences are equal, positive
/// value if this view is greater than the other character sequence.
int compare( size_type pos, size_type count1, const char_type* s,
size_type count2 ) const;
//------------------------------------------------------------------------
size_type find(basic_string_view v, size_type pos = 0) const;
size_type find(char_type c, size_type pos = 0) const;
size_type find(const char_type* s, size_type pos, size_type count) const;
size_type find(const char_type* s, size_type pos = 0) const;
//------------------------------------------------------------------------
size_type rfind(basic_string_view v, size_type pos = npos) const;
size_type rfind(char_type c, size_type pos = npos) const;
size_type rfind(const char_type* s, size_type pos, size_type count) const;
size_type rfind(const char_type* s, size_type pos = npos) const;
//------------------------------------------------------------------------
size_type find_first_of(basic_string_view v, size_type pos = 0) const;
size_type find_first_of(char_type c, size_type pos = 0) const;
size_type find_first_of(const char_type* s, size_type pos, size_type count) const;
size_type find_first_of(const char_type* s, size_type pos = 0) const;
//------------------------------------------------------------------------
size_type find_last_of(basic_string_view v, size_type pos = npos) const;
size_type find_last_of(char_type c, size_type pos = npos) const;
size_type find_last_of(const char_type* s, size_type pos, size_type count) const;
size_type find_last_of(const char_type* s, size_type pos = npos) const;
//------------------------------------------------------------------------
size_type find_first_not_of(basic_string_view v, size_type pos = 0) const;
size_type find_first_not_of(char_type c, size_type pos = 0) const;
size_type find_first_not_of(const char_type* s, size_type pos, size_type count) const;
size_type find_first_not_of(const char_type* s, size_type pos = 0) const;
//------------------------------------------------------------------------
size_type find_last_not_of(basic_string_view v, size_type pos = npos) const;
size_type find_last_not_of(char_type c, size_type pos = npos) const;
size_type find_last_not_of(const char_type* s, size_type pos, size_type count) const;
size_type find_last_not_of(const char_type* s, size_type pos = npos) const;
//------------------------------------------------------------------------
// Iterators
//------------------------------------------------------------------------
public:
/// \{
/// \brief Retrieves the begin iterator for this basic_string_view
///
/// \return the begin iterator
const_iterator begin() const noexcept;
const_iterator cbegin() const noexcept;
/// \}
/// \{
/// \brief Retrieves the end iterator for this basic_string_view
///
/// \return the end iterator
const_iterator end() const noexcept;
const_iterator cend() const noexcept;
/// \}
/// \{
/// \brief Retrieves the reverse begin iterator for this basic_string_view
///
/// \return the reverse begin iterator
const_reverse_iterator rbegin() const noexcept;
const_reverse_iterator rend() const noexcept;
/// \}
/// \{
/// \brief Retrieves the reverse end iterator for this basic_string_view
///
/// \return the reverse end iterator
const_reverse_iterator crbegin() const noexcept;
const_reverse_iterator crend() const noexcept;
/// \}
//------------------------------------------------------------------------
// Private Member
//------------------------------------------------------------------------
private:
const char_type* m_str; ///< The internal string type
size_type m_size; ///< The size of this string
/// \brief Checks whether \p c is one of the characters in \p str
///
/// \param c the character to check
/// \param str the characters to compare against
/// \return true if \p c is one of the characters in \p str
static bool is_one_of(CharT c, basic_string_view str);
};
template <typename CharT, typename Traits>
const typename basic_string_view<CharT,Traits>::size_type
basic_string_view<CharT,Traits>::npos;
//--------------------------------------------------------------------------
// Public Functions
//--------------------------------------------------------------------------
/// \brief Overload for ostream output of basic_string_view
///
/// \param o The output stream to print to
/// \param str the string to print
/// \return reference to the output stream
template<typename CharT, typename Traits>
std::basic_ostream<CharT,Traits>& operator<<(std::basic_ostream<CharT,Traits>& o,
const basic_string_view<CharT,Traits>& str);
template<typename CharT, typename Traits>
void swap(basic_string_view<CharT,Traits>& lhs,
basic_string_view<CharT,Traits>& rhs) noexcept;
//--------------------------------------------------------------------------
// Comparison Functions
//--------------------------------------------------------------------------
template<typename CharT, typename Traits>
bool operator==(const basic_string_view<CharT,Traits>& lhs,
const basic_string_view<CharT,Traits>& rhs) noexcept;
template<typename CharT, typename Traits>
bool operator!=(const basic_string_view<CharT,Traits>& lhs,
const basic_string_view<CharT,Traits>& rhs) noexcept;
template<typename CharT, typename Traits>
bool operator<(const basic_string_view<CharT,Traits>& lhs,
const basic_string_view<CharT,Traits>& rhs) noexcept;
template<typename CharT, typename Traits>
bool operator>(const basic_string_view<CharT,Traits>& lhs,
const basic_string_view<CharT,Traits>& rhs) noexcept;
template<typename CharT, typename Traits>
bool operator<=(const basic_string_view<CharT,Traits>& lhs,
const basic_string_view<CharT,Traits>& rhs) noexcept;
template<typename CharT, typename Traits>
bool operator>=(const basic_string_view<CharT,Traits>& lhs,
const basic_string_view<CharT,Traits>& rhs) noexcept;
//--------------------------------------------------------------------------
// Type Aliases
//--------------------------------------------------------------------------
using string_view = basic_string_view<char>;
using wstring_view = basic_string_view<wchar_t>;
using u16string_view = basic_string_view<char16_t>;
using u32string_view = basic_string_view<char32_t>;
} // namespace bpstd
#ifndef BPSTD_DETAIL_STRING_VIEW_INL
#define BPSTD_DETAIL_STRING_VIEW_INL
namespace bpstd {
//--------------------------------------------------------------------------
// Constructor
//--------------------------------------------------------------------------
template<typename CharT, typename Traits>
inline constexpr basic_string_view<CharT,Traits>::basic_string_view()
noexcept
: m_str(nullptr),
m_size(0)
{
}
template<typename CharT, typename Traits>
template<typename Allocator>
inline basic_string_view<CharT,Traits>::basic_string_view(const std::basic_string<CharT,Traits,Allocator>& str)
noexcept
: m_str(str.c_str()),
m_size(str.size())
{
}
template<typename CharT, typename Traits>
inline constexpr basic_string_view<CharT,Traits>::basic_string_view(const char_type* str)
noexcept
: m_str(str),
m_size(traits_type::length(str))
{
}
template<typename CharT, typename Traits>
inline constexpr basic_string_view<CharT,Traits>::basic_string_view(const char_type* str, size_type count)
noexcept
: m_str(str),
m_size(count)
{
}
//--------------------------------------------------------------------------
// Capacity
//--------------------------------------------------------------------------
template<typename CharT, typename Traits>
inline constexpr typename basic_string_view<CharT,Traits>::size_type
basic_string_view<CharT,Traits>::size()
const noexcept
{
return m_size;
}
template<typename CharT, typename Traits>
inline constexpr typename basic_string_view<CharT,Traits>::size_type
basic_string_view<CharT,Traits>::length()
const noexcept
{
return size();
}
template<typename CharT, typename Traits>
inline constexpr typename basic_string_view<CharT,Traits>::size_type
basic_string_view<CharT,Traits>::max_size()
const noexcept
{
return npos - 1;
}
template<typename CharT, typename Traits>
inline constexpr bool basic_string_view<CharT,Traits>::empty()
const noexcept
{
return m_size == 0;
}
//--------------------------------------------------------------------------
// Element Access
//--------------------------------------------------------------------------
template<typename CharT, typename Traits>
inline constexpr const typename basic_string_view<CharT,Traits>::char_type*
basic_string_view<CharT,Traits>::c_str()
const noexcept
{
return m_str;
}
template<typename CharT, typename Traits>
inline constexpr const typename basic_string_view<CharT,Traits>::char_type*
basic_string_view<CharT,Traits>::data()
const noexcept
{
return m_str;
}
template<typename CharT, typename Traits>
inline constexpr typename basic_string_view<CharT,Traits>::const_reference
basic_string_view<CharT,Traits>::operator[](size_type pos)
const noexcept
{
return m_str[pos];
}
template<typename CharT, typename Traits>
inline constexpr typename basic_string_view<CharT,Traits>::const_reference
basic_string_view<CharT,Traits>::at(size_type pos)
const
{
return pos < m_size ? m_str[pos] : throw std::out_of_range("Input out of range in basic_string_view::at"), m_str[pos];
}
template<typename CharT, typename Traits>
inline constexpr typename basic_string_view<CharT,Traits>::const_reference
basic_string_view<CharT,Traits>::front( )
const noexcept
{
return *m_str;
}
template<typename CharT, typename Traits>
inline constexpr typename basic_string_view<CharT,Traits>::const_reference
basic_string_view<CharT,Traits>::back( )
const noexcept
{
return m_str[m_size-1];
}
//--------------------------------------------------------------------------
// Modifiers
//--------------------------------------------------------------------------
template<typename CharT, typename Traits>
inline void
basic_string_view<CharT,Traits>::remove_prefix(size_type n)
noexcept
{
m_str += n, m_size -= n;
}
template<typename CharT, typename Traits>
inline void
basic_string_view<CharT,Traits>::remove_suffix(size_type n)
noexcept
{
m_size -= n;
}
template<typename CharT, typename Traits>
inline void
basic_string_view<CharT,Traits>::swap(basic_string_view& v)
noexcept
{
using std::swap;
swap(m_size,v.m_size);
swap(m_str,v.m_str);
}
//--------------------------------------------------------------------------
// Conversions
//--------------------------------------------------------------------------
template<typename CharT, typename Traits>
template<class Allocator>
inline constexpr std::basic_string<CharT, Traits, Allocator>
basic_string_view<CharT,Traits>::to_string(const Allocator& a)
const
{
return std::basic_string<CharT,Traits,Allocator>(m_str, m_size, a);
}
template<typename CharT, typename Traits>
template<class Allocator>
inline constexpr basic_string_view<CharT,Traits>::operator
std::basic_string<CharT, Traits, Allocator>()
const
{
return std::basic_string<CharT,Traits,Allocator>(m_str, m_size);
}
//--------------------------------------------------------------------------
// String Operations
//--------------------------------------------------------------------------
template<typename CharT, typename Traits>
inline typename basic_string_view<CharT,Traits>::size_type
basic_string_view<CharT,Traits>::copy(char_type* dest,
size_type count,
size_type pos)
const
{
if(pos >= m_size) {
throw std::out_of_range("Index out of range in basic_string_view::copy");
}
const size_type rcount = std::min(m_size - pos,count+1);
std::copy( m_str + pos, m_str + pos + rcount, dest);
return rcount;
}
template<typename CharT, typename Traits>
inline basic_string_view<CharT,Traits>
basic_string_view<CharT,Traits>::substr(size_type pos,
size_type len)
const
{
const size_type max_length = pos > m_size ? 0 : m_size - pos;
if (pos > size()) {
throw std::out_of_range("Index out of range in basic_string_view::substr");
}
return basic_string_view(m_str + pos, std::min(len, max_length) );
}
//--------------------------------------------------------------------------
template<typename CharT, typename Traits>
inline int basic_string_view<CharT,Traits>::compare(basic_string_view v)
const noexcept
{
const size_type rlen = std::min(m_size,v.m_size);
const int compare = Traits::compare(m_str,v.m_str,rlen);
return (compare ? compare : (m_size < v.m_size ? -1 : (m_size > v.m_size ? 1 : 0)));
}
template<typename CharT, typename Traits>
inline int basic_string_view<CharT,Traits>::compare(size_type pos,
size_type count,
basic_string_view v)
const
{
return substr(pos,count).compare(v);
}
template<typename CharT, typename Traits>
inline int basic_string_view<CharT,Traits>::compare(size_type pos1,
size_type count1,
basic_string_view v,
size_type pos2,
size_type count2)
const
{
return substr(pos1,count1).compare(v.substr(pos2,count2));
}
template<typename CharT, typename Traits>
inline int basic_string_view<CharT,Traits>::compare(const char_type* s)
const
{
return compare(basic_string_view<CharT,Traits>(s));
}
template<typename CharT, typename Traits>
inline int basic_string_view<CharT,Traits>::compare(size_type pos,
size_type count,
const char_type* s)
const
{
return substr(pos, count).compare(basic_string_view<CharT,Traits>(s));
}
template<typename CharT, typename Traits>
inline int basic_string_view<CharT,Traits>::compare(size_type pos,
size_type count1,
const char_type* s,
size_type count2)
const
{
return substr(pos, count1).compare(basic_string_view<CharT,Traits>(s, count2));
}
//--------------------------------------------------------------------------
template<typename CharT, typename Traits>
inline typename basic_string_view<CharT,Traits>::size_type
basic_string_view<CharT,Traits>::find(basic_string_view v,
size_type pos)
const
{
// Can't find a substring if the substring is bigger than this
if (pos > size()) {
return npos;
}
if ((pos + v.size()) > size()) {
return npos;
}
const auto offset = pos;
const auto increments = size() - v.size();
for (auto i = 0u; i <= increments; ++i) {
const auto j = i + offset;
if (substr(j, v.size()) == v) {
return j;
}
}
return npos;
}
template<typename CharT, typename Traits>
inline typename basic_string_view<CharT,Traits>::size_type
basic_string_view<CharT,Traits>::find(char_type c,
size_type pos)
const
{
return find(basic_string_view<CharT,Traits>(&c, 1), pos);
}
template<typename CharT, typename Traits>
inline typename basic_string_view<CharT,Traits>::size_type
basic_string_view<CharT,Traits>::find(const char_type* s, size_type pos,
size_type count)
const
{
return find(basic_string_view<CharT,Traits>(s, count), pos);
}
template<typename CharT, typename Traits>
inline typename basic_string_view<CharT,Traits>::size_type
basic_string_view<CharT,Traits>::find(const char_type* s,
size_type pos)
const
{
return find(basic_string_view<CharT,Traits>(s), pos);
}
//--------------------------------------------------------------------------
template<typename CharT, typename Traits>
inline typename basic_string_view<CharT,Traits>::size_type
basic_string_view<CharT,Traits>::rfind(basic_string_view v,
size_type pos)
const
{
if (empty()) {
return v.empty() ? 0u : npos;
}
if (v.empty()) {
return std::min(size() - 1, pos);
}
if (v.size() > size()) {
return npos;
}
auto i = std::min(pos, (size() - v.size()));
while (i != npos) {
if (substr(i, v.size()) == v) {
return i;
}
--i;
}
return npos;
}
template<typename CharT, typename Traits>
inline typename basic_string_view<CharT,Traits>::size_type
basic_string_view<CharT,Traits>::rfind(char_type c,
size_type pos)
const
{
return rfind(basic_string_view<CharT,Traits>(&c, 1), pos);
}
template<typename CharT, typename Traits>
inline typename basic_string_view<CharT,Traits>::size_type
basic_string_view<CharT,Traits>::rfind(const char_type* s, size_type pos,
size_type count)
const
{
return rfind(basic_string_view<CharT,Traits>(s, count), pos);
}
template<typename CharT, typename Traits>
inline typename basic_string_view<CharT,Traits>::size_type
basic_string_view<CharT,Traits>::rfind(const char_type* s,
size_type pos)
const
{
return rfind(basic_string_view<CharT,Traits>(s), pos);
}
//--------------------------------------------------------------------------
template<typename CharT, typename Traits>
inline typename basic_string_view<CharT,Traits>::size_type
basic_string_view<CharT,Traits>::find_first_of(basic_string_view v,
size_type pos)
const
{
const auto max_index = size();
for (auto i = pos; i < max_index; ++i) {
if (is_one_of(m_str[i],v)) {
return i;
}
}
return npos;
}
template<typename CharT, typename Traits>
inline typename basic_string_view<CharT,Traits>::size_type
basic_string_view<CharT,Traits>::find_first_of(char_type c,
size_type pos)
const
{
return find_first_of(basic_string_view<CharT,Traits>(&c, 1), pos);
}
template<typename CharT, typename Traits>
inline typename basic_string_view<CharT,Traits>::size_type
basic_string_view<CharT,Traits>::find_first_of(const char_type* s, size_type pos,
size_type count)
const
{
return find_first_of(basic_string_view<CharT,Traits>(s, count), pos);
}
template<typename CharT, typename Traits>
inline typename basic_string_view<CharT,Traits>::size_type
basic_string_view<CharT,Traits>::find_first_of(const char_type* s,
size_type pos)
const
{
return find_first_of(basic_string_view<CharT,Traits>(s), pos);
}
//--------------------------------------------------------------------------
template<typename CharT, typename Traits>
inline typename basic_string_view<CharT,Traits>::size_type
basic_string_view<CharT,Traits>::find_last_of(basic_string_view v,
size_type pos)
const
{
if (empty()) {
return npos;
}
const auto max_index = std::min(size() - 1, pos);
for (auto i = 0u; i <= max_index; ++i) {
const auto j = max_index - i;
if (is_one_of(m_str[j],v)) {
return j;
}
}
return npos;
}
template<typename CharT, typename Traits>
inline typename basic_string_view<CharT,Traits>::size_type
basic_string_view<CharT,Traits>::find_last_of(char_type c,
size_type pos)
const
{
return find_last_of(basic_string_view<CharT,Traits>(&c, 1), pos);
}
template<typename CharT, typename Traits>
inline typename basic_string_view<CharT,Traits>::size_type
basic_string_view<CharT,Traits>::find_last_of(const char_type* s, size_type pos,
size_type count)
const
{
return find_last_of(basic_string_view<CharT,Traits>(s, count), pos);
}
template<typename CharT, typename Traits>
inline typename basic_string_view<CharT,Traits>::size_type
basic_string_view<CharT,Traits>::find_last_of(const char_type* s,
size_type pos)
const
{
return find_last_of(basic_string_view<CharT,Traits>(s), pos);
}
//--------------------------------------------------------------------------
template<typename CharT, typename Traits>
inline typename basic_string_view<CharT,Traits>::size_type
basic_string_view<CharT,Traits>::find_first_not_of(basic_string_view v,
size_type pos)
const
{
const auto max_index = size();
for (auto i = pos; i < max_index; ++i) {
if (!is_one_of(m_str[i],v)) {
return i;
}
}
return npos;
}
template<typename CharT, typename Traits>
inline typename basic_string_view<CharT,Traits>::size_type
basic_string_view<CharT,Traits>::find_first_not_of(char_type c,