// -*-c++-*-
// vim: set ft=cpp:
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file LICENSE.rst or https://cmake.org/licensing for details. */
#pragma once
#include "cmSTL.hxx" // IWYU pragma: keep
#include <cstdint>
#include <cstring>
#include <iterator>
#include <string>
#include <utility>
#include <cm/string_view>
#include <cm/type_traits>
#include <cmext/iterator>
#if defined(CMake_HAVE_CXX_FILESYSTEM)
# include <filesystem> // IWYU pragma: export
#else
# include <cstddef>
# include <iostream>
# include <memory>
# include <cm/iomanip>
# if defined(_WIN32) && !defined(__CYGWIN__)
# include <algorithm>
# endif
#endif
namespace cm {
namespace filesystem {
#if !defined(CM_FILESYSTEM_SOURCE_TRAITS_ITERATOR)
// Oracle DeveloperStudio C++ compiler on Solaris/Sparc fails to compile
// the source_traits for iterator check. So disable it for now.
# define CM_FILESYSTEM_SOURCE_TRAITS_ITERATOR 0
#endif
namespace internals {
class unicode_helper
{
protected:
using utf8_state = unsigned char;
static utf8_state const s_start = 0;
static utf8_state const s_reject = 8;
static inline bool in_range(std::uint32_t c, std::uint32_t lo,
std::uint32_t hi)
{
return (static_cast<std::uint32_t>(c - lo) < (hi - lo + 1));
}
static inline bool is_surrogate(std::uint32_t c)
{
return in_range(c, 0xd800, 0xdfff);
}
static inline bool is_high_surrogate(std::uint32_t c)
{
return (c & 0xfffffc00) == 0xd800;
}
static inline bool is_low_surrogate(std::uint32_t c)
{
return (c & 0xfffffc00) == 0xdc00;
}
template <typename Char>
static void append(std::basic_string<Char>& str, std::uint32_t codepoint)
{
if (codepoint <= 0x7f) {
str.push_back(static_cast<Char>(codepoint));
} else if (codepoint >= 0x80 && codepoint <= 0x7ff) {
str.push_back(static_cast<Char>((codepoint >> 6) + 192));
str.push_back(static_cast<Char>((codepoint & 0x3f) + 128));
} else if ((codepoint >= 0x800 && codepoint <= 0xd7ff) ||
(codepoint >= 0xe000 && codepoint <= 0xffff)) {
str.push_back(static_cast<Char>((codepoint >> 12) + 224));
str.push_back(static_cast<Char>(((codepoint & 0xfff) >> 6) + 128));
str.push_back(static_cast<Char>((codepoint & 0x3f) + 128));
} else if (codepoint >= 0x10000 && codepoint <= 0x10ffff) {
str.push_back(static_cast<Char>((codepoint >> 18) + 240));
str.push_back(static_cast<Char>(((codepoint & 0x3ffff) >> 12) + 128));
str.push_back(static_cast<Char>(((codepoint & 0xfff) >> 6) + 128));
str.push_back(static_cast<Char>((codepoint & 0x3f) + 128));
} else {
append(str, 0xfffd);
}
}
static utf8_state decode(utf8_state const state, std::uint8_t const fragment,
std::uint32_t& codepoint);
};
template <typename Char, typename = void>
class unicode
{
};
template <typename Char>
class unicode<Char, typename std::enable_if<(sizeof(Char) == 4)>::type>
: public unicode_helper
{
public:
// UTF32 -> UTF8
template <typename UTF8Char>
static std::basic_string<UTF8Char> to_utf8(wchar_t const* str)
{
std::basic_string<UTF8Char> result;
while (auto c = *str++) {
append(result, c);
}
return result;
}
template <typename UTF8Char>
static std::basic_string<UTF8Char> to_utf8(std::wstring const& str)
{
return unicode<Char>::template to_utf8<UTF8Char>(str.c_str());
}
template <typename UTF8Char>
static std::basic_string<UTF8Char> to_utf8(wchar_t c)
{
std::basic_string<UTF8Char> result;
append(result, c);
return result;
}
// UTF8 -> UTF32
template <typename UTF8Char>
static std::wstring from_utf8(UTF8Char const* str, std::size_t length)
{
std::wstring result;
result.reserve(length);
utf8_state state = s_start;
std::uint32_t codepoint = 0;
while (*str) {
if ((state = decode(state, static_cast<std::uint8_t>(*str++),
codepoint)) == s_start) {
result += static_cast<std::wstring::value_type>(codepoint);
codepoint = 0;
} else if (state == s_reject) {
result += static_cast<std::wstring::value_type>(0xfffd);
state = s_start;
codepoint = 0;
}
}
if (state) {
result += static_cast<std::wstring::value_type>(0xfffd);
}
return result;
}
template <typename UTF8Char>
static std::wstring from_utf8(UTF8Char const* str)
{
return unicode<Char>::from_utf8(
str, std::strlen(reinterpret_cast<char const*>(str)));
}
template <typename UTF8Char>
static std::wstring from_utf8(std::basic_string<UTF8Char> const& str)
{
return unicode<Char>::from_utf8(str.c_str(), str.length());
}
template <typename UTF8Char>
static std::wstring from_utf8(UTF8Char c)
{
std::wstring result;
utf8_state state = s_start;
std::uint32_t codepoint = 0;
if ((state = decode(state, static_cast<std::uint8_t>(c), codepoint)) ==
s_start) {
result += static_cast<std::wstring::value_type>(codepoint);
} else {
result += static_cast<std::wstring::value_type>(0xfffd);
}
return result;
}
};
template <typename Char>
class unicode<Char, typename std::enable_if<(sizeof(Char) == 2)>::type>
: public unicode_helper
{
public:
// UTF16 -> UTF8
template <typename UTF8Char>
static std::basic_string<UTF8Char> to_utf8(wchar_t const* str)
{
std::basic_string<UTF8Char> result;
for (; *str; ++str) {
std::uint32_t c = *str;
if (is_surrogate(c)) {
++str;
if (*str && is_high_surrogate(c) && is_low_surrogate(*str)) {
append(result, (std::uint32_t(c) << 10) + *str - 0x35fdc00);
} else {
append(result, 0xfffd);
if (!*str) {
break;
}
}
} else {
append(result, c);
}
}
return result;
}
template <typename UTF8Char>
static std::basic_string<UTF8Char> to_utf8(std::wstring const& str)
{
return unicode<Char>::template to_utf8<UTF8Char>(str.c_str());
}
template <typename UTF8Char>
static std::basic_string<UTF8Char> to_utf8(wchar_t c)
{
std::basic_string<UTF8Char> result;
if (is_surrogate(c)) {
append(result, 0xfffd);
} else {
append(result, c);
}
return result;
}
// UTF8 -> UTF16
template <typename UTF8Char>
static std::wstring from_utf8(UTF8Char const* str, std::size_t length)
{
std::wstring result;
result.reserve(length);
utf8_state state = s_start;
std::uint32_t codepoint = 0;
while (*str) {
if ((state = decode(state, static_cast<std::uint8_t>(*str++),
codepoint)) == s_start) {
if (codepoint <= 0xffff) {
result += static_cast<std::wstring::value_type>(codepoint);
} else {
codepoint -= 0x10000;
result +=
static_cast<std::wstring::value_type>((codepoint >> 10) + 0xd800);
result += static_cast<std::wstring::value_type>((codepoint & 0x3ff) +
0xdc00);
}
codepoint = 0;
} else if (state == s_reject) {
result += static_cast<std::wstring::value_type>(0xfffd);
state = s_start;
codepoint = 0;
}
}
if (state) {
result += static_cast<std::wstring::value_type>(0xfffd);
}
return result;
}
template <typename UTF8Char>
static std::wstring from_utf8(UTF8Char const* str)
{
return unicode<Char>::from_utf8(
str, std::strlen(reinterpret_cast<char const*>(str)));
}
template <typename UTF8Char>
static std::wstring from_utf8(std::basic_string<UTF8Char> const& str)
{
return unicode<Char>::from_utf8(str.c_str(), str.length());
}
template <typename UTF8Char>
static std::wstring from_utf8(UTF8Char c)
{
std::wstring result;
utf8_state state = s_start;
std::uint32_t codepoint = 0;
if ((state = decode(state, static_cast<std::uint8_t>(c), codepoint)) ==
s_start) {
if (codepoint <= 0xffff) {
result += static_cast<std::wstring::value_type>(codepoint);
} else {
codepoint -= 0x10000;
result +=
static_cast<std::wstring::value_type>((codepoint >> 10) + 0xd800);
result +=
static_cast<std::wstring::value_type>((codepoint & 0x3ff) + 0xdc00);
}
} else {
result += static_cast<std::wstring::value_type>(0xfffd);
}
return result;
}
};
template <typename In, typename Out>
class unicode_converter;
template <>
class unicode_converter<char, wchar_t>
{
public:
std::wstring operator()(std::string const& in)
{
return unicode<wchar_t>::from_utf8(in);
}
std::wstring operator()(std::string&& in)
{
return unicode<wchar_t>::from_utf8(in);
}
std::wstring operator()(char const* in)
{
return unicode<wchar_t>::from_utf8(in);
}
std::wstring operator()(char in) { return unicode<wchar_t>::from_utf8(in); }
};
template <>
class unicode_converter<wchar_t, char>
{
public:
std::string operator()(std::wstring const& in)
{
return unicode<wchar_t>::to_utf8<char>(in);
}
std::string operator()(std::wstring&& in)
{
return unicode<wchar_t>::to_utf8<char>(in);
}
std::string operator()(wchar_t const* in)
{
return unicode<wchar_t>::to_utf8<char>(in);
}
std::string operator()(wchar_t in)
{
return unicode<wchar_t>::to_utf8<char>(in);
}
};
template <>
class unicode_converter<char, char>
{
public:
std::string operator()(std::string const& in) { return in; }
std::string operator()(std::string&& in) { return in; }
std::string operator()(char const* in) { return std::string(in); }
std::string operator()(char in) { return std::string(1, in); }
};
template <>
class unicode_converter<wchar_t, wchar_t>
{
public:
std::wstring operator()(std::wstring const& in) { return in; }
std::wstring operator()(std::wstring&& in) { return in; }
std::wstring operator()(wchar_t const* in) { return std::wstring(in); }
std::wstring operator()(wchar_t in) { return std::wstring(1, in); }
};
#if defined(__cpp_char8_t)
template <>
class unicode_converter<char, char8_t>
{
public:
std::u8string operator()(std::string const& in)
{
return std::u8string{ reinterpret_cast<char8_t const*>(in.c_str()) };
}
std::u8string operator()(std::string&& in)
{
return std::u8string{ reinterpret_cast<char8_t const*>(in.c_str()) };
}
std::u8string operator()(char const* in)
{
return std::u8string{ reinterpret_cast<char8_t const*>(in) };
}
std::u8string operator()(char in)
{
return std::u8string{ 1, static_cast<char8_t>(in) };
}
};
template <>
class unicode_converter<char8_t, char>
{
public:
std::string operator()(std::u8string const& in)
{
return std::string{ reinterpret_cast<char const*>(in.c_str()) };
}
std::string operator()(std::u8string&& in)
{
return std::string{ reinterpret_cast<char const*>(in.c_str()) };
}
std::string operator()(char8_t const* in)
{
return std::string{ reinterpret_cast<char const*>(in) };
}
std::string operator()(char8_t in)
{
return std::string{ 1, static_cast<char>(in) };
}
};
template <>
class unicode_converter<wchar_t, char8_t>
{
public:
std::u8string operator()(std::wstring const& in)
{
return unicode<wchar_t>::to_utf8<char8_t>(in);
}
std::u8string operator()(std::wstring&& in)
{
return unicode<wchar_t>::to_utf8<char8_t>(in);
}
std::u8string operator()(wchar_t const* in)
{
return unicode<wchar_t>::to_utf8<char8_t>(in);
}
std::u8string operator()(wchar_t in)
{
return unicode<wchar_t>::to_utf8<char8_t>(in);
}
};
template <>
class unicode_converter<char8_t, wchar_t>
{
public:
std::wstring operator()(std::u8string const& in)
{
return unicode<wchar_t>::from_utf8(in);
}
std::wstring operator()(std::u8string&& in)
{
return unicode<wchar_t>::from_utf8(in);
}
std::wstring operator()(char8_t const* in)
{
return unicode<wchar_t>::from_utf8(in);
}
std::wstring operator()(char8_t in)
{
return unicode<wchar_t>::from_utf8(in);
}
};
#endif
template <typename In>
struct string_converter
{
};
template <>
struct string_converter<char>
{
// some compilers, like gcc 4.8 does not implement the following C++11
// signature:
// std::string::string(const string&, const Allocator&)
// As workaround, use char* pointer.
template <typename Char, typename Traits, typename Alloc>
static std::basic_string<Char, Traits, Alloc> to(std::string const& in,
Alloc const& a)
{
return std::basic_string<Char, Traits, Alloc>(
unicode_converter<char, Char>()(in).c_str(), a);
}
template <typename Char, typename Traits, typename Alloc>
static std::basic_string<Char, Traits, Alloc> to(char const* in,
Alloc const& a)
{
return std::basic_string<Char, Traits, Alloc>(
unicode_converter<char, Char>()(in).c_str(), a);
}
template <typename Char, typename Traits, typename Alloc>
static std::basic_string<Char, Traits, Alloc> to(char in, Alloc const& a)
{
return std::basic_string<Char, Traits, Alloc>(
unicode_converter<char, Char>()(in).c_str(), a);
}
template <typename Char>
static std::basic_string<Char> to(std::string const& in)
{
return std::basic_string<Char>(unicode_converter<char, Char>()(in));
}
template <typename Char>
static std::basic_string<Char> to(std::string&& in)
{
return std::basic_string<Char>(
unicode_converter<char, Char>()(std::move(in)));
}
template <typename Char>
static std::basic_string<Char> to(cm::string_view in)
{
return std::basic_string<Char>(
unicode_converter<char, Char>()(std::string{ in.begin(), in.end() }));
}
template <typename Char>
static std::basic_string<Char> to(char const* in)
{
return std::basic_string<Char>(unicode_converter<char, Char>()(in));
}
template <typename Char>
static std::basic_string<Char> to(char in)
{
return std::basic_string<Char>(unicode_converter<char, Char>()(in));
}
template <typename Char, typename Iterator>
static std::basic_string<Char> to(Iterator it)
{
char e = '\0';
std::string tmp;
for (; *it != e; ++it) {
tmp.push_back(*it);
}
return std::basic_string<Char>(
unicode_converter<char, Char>()(std::move(tmp)));
}
template <typename Char, typename Iterator>
static std::basic_string<Char> to(Iterator begin, Iterator end)
{
return std::basic_string<Char>(
unicode_converter<char, Char>()(std::string{ begin, end }));
}
};
template <>
struct string_converter<wchar_t>
{
// some compilers, like gcc 4.8 does not implement the following C++11
// signature:
// std::string::string(const string&, const Allocator&)
// As workaround, use char* pointer.
template <typename Char, typename Traits, typename Alloc>
static std::basic_string<Char, Traits, Alloc> to(std::wstring const& in,
Alloc const& a)
{
return std::basic_string<Char, Traits, Alloc>(
unicode_converter<wchar_t, Char>()(in).c_str(), a);
}
template <typename Char, typename Traits, typename Alloc>
static std::basic_string<Char, Traits, Alloc> to(wchar_t const* in,
Alloc const& a)
{
return std::basic_string<Char, Traits, Alloc>(
unicode_converter<wchar_t, Char>()(in).c_str(), a);
}
template <typename Char, typename Traits, typename Alloc>
static std::basic_string<Char, Traits, Alloc> to(wchar_t in, Alloc const& a)
{
return std::basic_string<Char, Traits, Alloc>(
unicode_converter<wchar_t, Char>()(in).c_str(), a);
}
template <typename Char>
static std::basic_string<Char> to(std::wstring const& in)
{
return std::basic_string<Char>(unicode_converter<wchar_t, Char>()(in));
}
template <typename Char>
static std::basic_string<Char> to(std::wstring&& in)
{
return std::basic_string<Char>(
unicode_converter<wchar_t, Char>()(std::move(in)));
}
template <typename Char>
static std::basic_string<Char> to(wchar_t const* in)
{
return std::basic_string<Char>(unicode_converter<wchar_t, Char>()(in));
}
template <typename Char>
static std::basic_string<Char> to(wchar_t in)
{
return std::basic_string<Char>(unicode_converter<wchar_t, Char>()(in));
}
template <typename Char, typename Iterator>
static std::basic_string<Char> to(Iterator it)
{
wchar_t e = '\0';
std::wstring tmp;
for (; *it != e; ++it) {
tmp.push_back(*it);
}
return std::basic_string<Char>(
unicode_converter<wchar_t, Char>()(std::move(tmp)));
}
template <typename Char, typename Iterator>
static std::basic_string<Char> to(Iterator begin, Iterator end)
{
return std::basic_string<Char>(
unicode_converter<wchar_t, Char>()(std::wstring{ begin, end }));
}
};
#if defined(__cpp_char8_t)
template <>
struct string_converter<char8_t>
{
// some compilers, like gcc 4.8 does not implement the following C++11
// signature:
// std::string::string(const string&, const Allocator&)
// As workaround, use char* pointer.
template <typename Char, typename Traits, typename Alloc>
static std::basic_string<Char, Traits, Alloc> to(std::u8string const& in,
Alloc const& a)
{
return std::basic_string<Char, Traits, Alloc>(
unicode_converter<char8_t, Char>()(in).c_str(), a);
}
template <typename Char, typename Traits, typename Alloc>
static std::basic_string<Char, Traits, Alloc> to(char8_t const* in,
Alloc const& a)
{
return std::basic_string<Char, Traits, Alloc>(
unicode_converter<char8_t, Char>()(in).c_str(), a);
}
template <typename Char, typename Traits, typename Alloc>
static std::basic_string<Char, Traits, Alloc> to(char8_t in, Alloc const& a)
{
return std::basic_string<Char, Traits, Alloc>(
unicode_converter<char8_t, Char>()(in).c_str(), a);
}
template <typename Char>
static std::basic_string<Char> to(std::u8string const& in)
{
return std::basic_string<Char>(unicode_converter<char8_t, Char>()(in));
}
template <typename Char>
static std::basic_string<Char> to(std::u8string&& in)
{
return std::basic_string<Char>(
unicode_converter<char8_t, Char>()(std::move(in)));
}
template <typename Char>
static std::basic_string<Char> to(char8_t const* in)
{
return std::basic_string<Char>(unicode_converter<char8_t, Char>()(in));
}
template <typename Char>
static std::basic_string<Char> to(char8_t in)
{
return std::basic_string<Char>(unicode_converter<char8_t, Char>()(in));
}
template <typename Char, typename Iterator>
static std::basic_string<Char> to(Iterator it)
{
char8_t e = '\0';
std::u8string tmp;
for (; *it != e; ++it) {
tmp.push_back(*it);
}
return std::basic_string<Char>(
unicode_converter<char8_t, Char>()(std::move(tmp)));
}
template <typename Char, typename Iterator>
static std::basic_string<Char> to(Iterator begin, Iterator end)
{
return std::basic_string<Char>(
unicode_converter<char8_t, Char>()(std::u8string{ begin, end }));
}
};
#endif
template <typename T, typename = void>
struct source_traits
{
};
template <typename T, std::size_t N>
struct source_traits<T[N]>
{
using value_type = T;
};
template <typename T>
struct source_traits<T*>
{
using value_type = cm::decay_t<T>;
};
template <typename Char, typename Traits, typename Alloc>
struct source_traits<std::basic_string<Char, Traits, Alloc>>
{
using value_type =
typename std::basic_string<Char, Traits, Alloc>::value_type;
};
template <>
struct source_traits<cm::string_view>
{
using value_type = cm::string_view::value_type;
};
#if CM_FILESYSTEM_SOURCE_TRAITS_ITERATOR
template <typename T>
struct source_traits<T, cm::enable_if_t<cm::is_iterator<T>::value, void>>
{
using value_type =
typename std::iterator_traits<typename std::decay<T>::type>::value_type;
};
#endif
template <typename T>
struct is_pathable_string : std::false_type
{
};
template <typename Traits, typename Alloc>
struct is_pathable_string<std::basic_string<char, Traits, Alloc>>
: std::true_type
{
};
template <typename Traits, typename Alloc>
struct is_pathable_string<std::basic_string<wchar_t, Traits, Alloc>>
: std::true_type
{
};
template <>
struct is_pathable_string<cm::string_view> : std::true_type
{
};
template <typename T, typename = void>
struct is_pathable_char_array : std::false_type
{
};
template <typename T>
struct is_pathable_char_array<
T,
cm::enable_if_t<
std::is_same<char*, typename std::decay<T>::type>::value ||
std::is_same<wchar_t*, typename std::decay<T>::type>::value,
void>>
: bool_constant<std::is_same<char*, typename std::decay<T>::type>::value ||
std::is_same<wchar_t*, typename std::decay<T>::type>::value>
{
};
template <typename T, typename = void>
struct is_pathable_iterator : std::false_type
{
};
template <typename T>
struct is_pathable_iterator<
T,
cm::enable_if_t<
is_input_iterator<T>::value &&
(std::is_same<char,
typename std::iterator_traits<
typename std::decay<T>::type>::value_type>::value ||
std::is_same<wchar_t,
typename std::iterator_traits<
typename std::decay<T>::type>::value_type>::value),
void>>
: bool_constant<
std::is_same<char,
typename std::iterator_traits<
typename std::decay<T>::type>::value_type>::value ||
std::is_same<wchar_t,
typename std::iterator_traits<
typename std::decay<T>::type>::value_type>::value>
{
};
#if defined(__SUNPRO_CC) && defined(__sparc)
// Oracle DeveloperStudio C++ compiler on Solaris/Sparc fails to compile
// the full 'is_pathable' check. We use it only to improve error messages
// via 'enable_if' when calling methods with incorrect types. Just
// pretend all types are allowed so we can at least compile valid code.
template <typename T>
struct is_pathable : std::true_type
{
};
#else
template <typename T>
struct is_pathable
: bool_constant<is_pathable_string<T>::value ||
is_pathable_char_array<T>::value ||
is_pathable_iterator<T>::value>
{
};
#endif
template <typename In, typename Out>
struct source_converter
{
};
template <>
struct source_converter<char, char>
{
template <typename Iterator>
static void append_range(std::string& p, Iterator b, Iterator e)
{
if (b == e) {
return;
}
p.append(b, e);
}
template <typename Iterator>
static void append_range(std::string& p, Iterator b)
{
char e = '\0';
if (*b == e) {
return;
}
for (; *b != e; ++b) {
p.push_back(*b);
}
}
static void append_source(std::string& p, cm::string_view s)
{
append_range(p, s.begin(), s.end());
}
static void append_source(std::string& p, std::string const& s)
{
append_range(p, s.begin(), s.end());
}
template <typename Source>
static void append_source(std::string& p, Source const& s)
{
append_range(p, s);
}
static void set_source(std::string& p, std::string&& s) { p = std::move(s); }
static std::string from(cm::string_view s)
{
return std::string{ s.begin(), s.end() };
}
static std::string from(std::string const& s) { return s; }
static std::string from(std::string&& s) { return s; }
template <typename Source>
static std::string from(Source const& s)
{
std::string result;
append_source(result, s);
return result;
}
template <typename Iterator>
static std::string from(Iterator first, Iterator last)
{
return std::string{ first, last };
}
};
template <>
struct source_converter<char, wchar_t>
{
static std::wstring from(std::string const& s)
{
return string_converter<char>::to<wchar_t>(s);
}
static std::wstring from(std::string&& s)
{
return string_converter<char>::to<wchar_t>(std::move(s));
}
template <typename Source>
static std::wstring from(Source const& s)
{
return string_converter<char>::to<wchar_t>(s);
}
template <typename Iterator>
static std::wstring from(Iterator first, Iterator last)
{
return string_converter<char>::to<wchar_t>(first, last);
}
};
template <>
struct source_converter<wchar_t, wchar_t>
{
template <typename Iterator>
static void append_range(std::wstring& p, Iterator b, Iterator e)
{
if (b == e) {
return;
}
p.append(b, e);
}
template <typename Iterator>
static void append_range(std::wstring& p, Iterator b)
{
char e = '\0';
if (*b == e) {
return;
}
for (; *b != e; ++b) {
p.push_back(*b);
}
}
template <typename Source>
static void append_source(std::wstring& p, Source const& s)
{
append_range(p, s);
}
static std::wstring from(std::wstring const& s) { return s; }
static std::wstring from(std::wstring&& s) { return s; }
template <typename Source>
static std::wstring from(Source const& s)
{
std::wstring result;
append_source(result, s);
return result;
}
template <typename Iterator>
static std::wstring from(Iterator first, Iterator last)
{
return std::wstring{ first, last };
}
};
template <>
struct source_converter<wchar_t, char>
{
template <typename Iterator>
static void append_range(std::string& p, Iterator b, Iterator e)
{
if (b == e) {
return;
}
std::string dest = string_converter<wchar_t>::to<char>(b, e);
p.append(dest.begin(), dest.end());
}
template <typename Iterator>
static void append_range(std::string& p, Iterator b)
{
wchar_t e = '\0';
if (*b == e) {
return;
}
std::string dest = string_converter<wchar_t>::to<char>(b);
p.append(dest.begin(), dest.end());
}
static void append_source(std::string& p, std::wstring const& s)
{
append_range(p, s.begin(), s.end());
}
template <typename Source>
static void append_source(std::string& p, Source const& s)
{
append_range(p, s);
}
static void set_source(std::string& p, std::wstring&& s)
{
p = string_converter<wchar_t>::to<char>(std::move(s));
}
static std::string from(std::wstring const& s)
{
return string_converter<wchar_t>::to<char>(s);
}
static std::string from(std::wstring&& s)
{
return string_converter<wchar_t>::to<char>(std::move(s));
}
template <typename Source>
static std::string from(Source const& s)
{
return string_converter<wchar_t>::to<char>(s);
}
template <typename Iterator>
static std::string from(Iterator first, Iterator last)
{
return string_converter<wchar_t>::to<char>(first, last);
}
};
#if defined(__cpp_char8_t)
template <>
struct source_converter<char, char8_t>
{
static std::u8string from(std::string const& s)
{
return string_converter<char>::to<char8_t>(s);
}
static std::u8string from(std::string&& s)
{
return string_converter<char>::to<char8_t>(std::move(s));
}
template <typename Source>
static std::u8string from(Source const& s)
{
return string_converter<char>::to<char8_t>(s);
}
template <typename Iterator>
static std::u8string from(Iterator first, Iterator last)
{
return string_converter<char>::to<char8_t>(first, last);
}
};
template <>
struct source_converter<char8_t, char>
{
static std::string from(std::u8string const& s)
{
return string_converter<char8_t>::to<char>(s);
}
static std::string from(std::u8string&& s)
{
return string_converter<char8_t>::to<char>(std::move(s));
}
template <typename Source>
static std::string from(Source const& s)
{
return string_converter<char8_t>::to<char>(s);
}
template <typename Iterator>
static std::string from(Iterator first, Iterator last)
{
return string_converter<char8_t>::to<char>(first, last);
}
};
template <>
struct source_converter<wchar_t, char8_t>
{
static std::u8string from(std::wstring const& s)
{
return string_converter<wchar_t>::to<char8_t>(s);
}
static std::u8string from(std::wstring&& s)
{
return string_converter<wchar_t>::to<char8_t>(std::move(s));
}
template <typename Source>
static std::u8string from(Source const& s)
{
return string_converter<wchar_t>::to<char8_t>(s);
}
template <typename Iterator>
static std::u8string from(Iterator first, Iterator last)
{
return string_converter<wchar_t>::to<char8_t>(first, last);
}
};
template <>
struct source_converter<char8_t, wchar_t>
{
static std::wstring from(std::u8string const& s)
{
return string_converter<char8_t>::to<wchar_t>(s);
}
static std::wstring from(std::u8string&& s)
{
return string_converter<char8_t>::to<wchar_t>(std::move(s));
}
template <typename Source>
static std::wstring from(Source const& s)
{
return string_converter<char8_t>::to<wchar_t>(s);
}
template <typename Iterator>
static std::wstring from(Iterator first, Iterator last)
{
return string_converter<char8_t>::to<wchar_t>(first, last);
}
};
#endif
}
#if defined(CMake_HAVE_CXX_FILESYSTEM)
class path : public std::filesystem::path
{
private:
using base = std::filesystem::path;
// define the char type to convert to
# if defined(__cpp_char8_t) && defined(_WIN32) && !defined(__CYGWIN__)
using target_type = char8_t;
# else
using target_type = base::value_type;
# endif
template <typename Source>
using enable_if_pathable =
enable_if_t<filesystem::internals::is_pathable<Source>::value, path&>;
template <typename Source, typename Target = target_type>
using string_converter = filesystem::internals::source_converter<
typename filesystem::internals::source_traits<Source>::value_type, Target>;
template <typename Iterator, typename Target = target_type>
using range_converter = filesystem::internals::source_converter<
typename std::iterator_traits<Iterator>::value_type, Target>;
public:
class iterator;
using const_iterator = iterator;
// Constructors
// ============
path() noexcept {}
path(path const& p)
: base(p)
{
}
path(path&& p) noexcept
: base(std::move(p))
{
}
path(string_type&& source, format fmt = format::auto_format)
: base(string_converter<string_type>::from(std::move(source)), fmt)
{
}
template <typename Source, typename = enable_if_pathable<Source>>
path(Source const& source, format fmt = format::auto_format)
: base(string_converter<Source>::from(source), fmt)
{
}
template <typename Iterator, typename = enable_if_pathable<Iterator>>
path(Iterator first, Iterator last, format fmt = format::auto_format)
: base(range_converter<Iterator>::from(first, last), fmt)
{
}
~path() = default;
// Assignments
// ===========
path& operator=(path const& p)
{
if (this != &p) {
this->base::operator=(static_cast<base const&>(p));
}
return *this;
}
path& operator=(path&& p) noexcept
{
if (this != &p) {
this->base::operator=(std::move(static_cast<base&&>(p)));
}
return *this;
}
path& operator=(string_type&& source)
{
return this->assign(std::move(source));
}
template <typename Source, typename = enable_if_pathable<Source>>
path& operator=(Source const& source)
{
return this->assign(source);
}
path& assign(string_type&& source)
{
this->base::assign(string_converter<string_type>::from(std::move(source)));
return *this;
}
template <typename Source, typename = enable_if_pathable<Source>>
path& assign(Source const& source)
{
this->base::assign(string_converter<Source>::from(source));
return *this;
}
template <typename Iterator, typename = enable_if_pathable<Iterator>>
path& assign(Iterator first, Iterator last)
{
this->base::assign(range_converter<Iterator>::from(first, last));
return *this;
}
// Concatenation
// =============
path& operator/=(path const& p)
{
this->base::operator/=(static_cast<base const&>(p));
return *this;
}
template <typename Source>
path& operator/=(Source const& source)
{
return this->append(source);
}
template <typename Source, typename = enable_if_pathable<Source>>
path& append(Source const& source)
{
this->base::append(string_converter<Source>::from(source));
return *this;
}
template <typename Iterator, typename = enable_if_pathable<Iterator>>
path& append(Iterator first, Iterator last)
{
this->base::append(range_converter<Iterator>::from(first, last));
return *this;
}
path& operator+=(path const& p)
{
this->base::operator+=(static_cast<base const&>(p));
return *this;
}
path& operator+=(string_type const& str) { return this->concat(str); }
path& operator+=(cm::string_view str)
{
this->concat(str.begin(), str.end());
return *this;
}
path& operator+=(value_type const* str) { return this->concat(str); }
path& operator+=(value_type const c)
{
return this->concat(string_type{ 1, c });
}
template <typename Source>
path& operator+=(Source const& source)
{
return this->concat(source);
}
template <typename Source, typename = enable_if_pathable<Source>>
path& concat(Source const& source)
{
this->base::concat(string_converter<Source>::from(source));
return *this;
}
template <typename Iterator, typename = enable_if_pathable<Iterator>>
path& concat(Iterator first, Iterator last)
{
this->base::concat(range_converter<Iterator>::from(first, last));
return *this;
}
// Format observers
// ================
string_type const& native() const noexcept
{
# if defined(_WIN32) && !defined(__CYGWIN__)
this->native_path_ = this->wstring();
return this->native_path_;
# else
return this->base::native();
# endif
}
value_type const* c_str() const noexcept { return this->native().c_str(); }
operator string_type() const { return this->native(); }
std::string string() const
{
# if defined(_WIN32) && !defined(__CYGWIN__)
# if defined(__cpp_char8_t)
return string_converter<std::u8string, std::string::value_type>::from(
this->base::u8string());
# else
return string_converter<std::wstring, std::string::value_type>::from(
this->base::wstring());
# endif
# else
return this->base::string();
# endif
}
std::wstring wstring() const { return this->base::wstring(); }
# if defined(__cpp_char8_t)
std::u8string u8string() const
# else
std::string u8string() const
# endif
{
# if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__cpp_char8_t)
return string_converter<std::wstring, std::string::value_type>::from(
this->base::wstring());
# else
return this->base::u8string();
# endif
}
std::string generic_string() const
{
# if defined(_WIN32) && !defined(__CYGWIN__)
# if defined(__cpp_char8_t)
return string_converter<std::u8string, std::string::value_type>::from(
this->base::generic_u8string());
# else
return string_converter<std::wstring, std::string::value_type>::from(
this->base::generic_wstring());
# endif
# else
return this->base::generic_string();
# endif
}
std::wstring generic_wstring() const
{
return this->base::generic_wstring();
}
# if defined(__cpp_char8_t)
std::u8string generic_u8string() const
# else
std::string generic_u8string() const
# endif
{
# if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__cpp_char8_t)
return string_converter<std::wstring, std::string::value_type>::from(
this->base::generic_wstring());
# else
return this->base::generic_u8string();
# endif
}
// Generation
// ==========
path lexically_normal() const { return this->base::lexically_normal(); }
path lexically_relative(path const& root) const
{
return this->base::lexically_relative(root);
}
path lexically_proximate(path const& root) const
{
return this->base::lexically_proximate(root);
}
// Decomposition
// =============
path root_name() const { return this->base::root_name(); }
path root_directory() const { return this->base::root_directory(); }
path root_path() const { return this->base::root_path(); }
path relative_path() const { return this->base::relative_path(); }
path parent_path() const { return this->base::parent_path(); }
path filename() const { return this->base::filename(); }
path stem() const { return this->base::stem(); }
path extension() const { return this->base::extension(); }
// Iterators
// =========
inline iterator begin() const;
inline iterator end() const;
// Non-members
// ===========
friend inline path operator/(path const& lhs, path const& rhs)
{
path result{ lhs };
result /= rhs;
return result;
}
private:
friend class iterator;
path(base&& p)
: base(std::move(p))
{
}
mutable string_type native_path_;
};
class path::iterator
{
public:
using iterator_category = std::filesystem::path::iterator::iterator_category;
using value_type = path;
using difference_type = std::filesystem::path::iterator::difference_type;
using pointer = path const*;
using reference = path const&;
iterator() = default;
iterator(iterator const& other)
: iterator_(other.iterator_)
{
}
~iterator() = default;
iterator& operator=(iterator const& other)
{
this->iterator_ = other.iterator_;
return *this;
}
reference operator*() const
{
this->path_element_ = path{ *this->iterator_ };
return this->path_element_;
}
pointer operator->() const
{
this->path_element_ = path{ *this->iterator_ };
return &this->path_element_;
}
iterator& operator++()
{
this->iterator_++;
return *this;
}
iterator operator++(int)
{
iterator it(*this);
this->operator++();
return *this;
}
iterator& operator--()
{
this->iterator_--;
return *this;
}
iterator operator--(int)
{
iterator it(*this);
this->operator--();
return it;
}
private:
friend class path;
friend bool operator==(iterator const&, iterator const&);
iterator(std::filesystem::path::iterator it)
: iterator_(it)
{
}
std::filesystem::path::iterator iterator_;
mutable path path_element_;
};
inline path::iterator path::begin() const
{
return iterator{ this->base::begin() };
}
inline path::iterator path::end() const
{
return iterator{ this->base::end() };
}
// Non-member functions
// ====================
inline bool operator==(path::iterator const& lhs, path::iterator const& rhs)
{
return lhs.iterator_ == rhs.iterator_;
}
inline bool operator!=(path::iterator const& lhs, path::iterator const& rhs)
{
return !(lhs == rhs);
}
inline void swap(path& lhs, path& rhs) noexcept
{
lhs.swap(rhs);
}
inline std::size_t hash_value(path const& p) noexcept
{
return std::filesystem::hash_value(p);
}
#else
namespace internals {
class path_parser;
}
class path
{
protected:
using path_type = std::string;
template <typename Source>
using enable_if_pathable =
enable_if_t<internals::is_pathable<Source>::value, path&>;
enum class filename_fragment : unsigned char
{
stem,
extension
};
public:
# if defined(_WIN32) && !defined(__CYGWIN__)
using value_type = wchar_t;
# else
using value_type = char;
# endif
using string_type = std::basic_string<value_type>;
class iterator;
using const_iterator = iterator;
enum format : unsigned char
{
auto_format,
native_format,
generic_format
};
# if defined(_WIN32) && !defined(__CYGWIN__)
static constexpr value_type preferred_separator = L'\\';
# else
static constexpr value_type preferred_separator = '/';
# endif
// Constructors
// ============
path() noexcept {}
path(path const& p)
: path_(p.path_)
{
}
path(path&& p) noexcept
: path_(std::move(p.path_))
{
}
path(string_type&& source, format fmt = auto_format)
{
(void)fmt;
internals::source_converter<value_type, path_type::value_type>::set_source(
this->path_, std::move(source));
}
template <typename Source, typename = enable_if_pathable<Source>>
path(Source const& source, format fmt = auto_format)
{
(void)fmt;
internals::source_converter<
typename internals::source_traits<Source>::value_type,
path_type::value_type>::append_source(this->path_, source);
}
template <typename Iterator, typename = enable_if_pathable<Iterator>>
path(Iterator first, Iterator last, format fmt = auto_format)
{
(void)fmt;
internals::source_converter<
typename std::iterator_traits<Iterator>::value_type,
path_type::value_type>::append_range(this->path_, first, last);
}
~path() = default;
// Assignments
// ===========
path& operator=(path const& p)
{
if (this != &p) {
this->path_ = p.path_;
}
return *this;
}
path& operator=(path&& p) noexcept
{
if (this != &p) {
this->path_ = std::move(p.path_);
}
return *this;
}
path& operator=(string_type&& source)
{
return this->assign(std::move(source));
}
template <typename Source, typename = enable_if_pathable<Source>>
path& operator=(Source const& source)
{
return this->assign(source);
}
path& assign(string_type&& source)
{
internals::source_converter<value_type, path_type::value_type>::set_source(
this->path_, std::move(source));
return *this;
}
template <typename Source, typename = enable_if_pathable<Source>>
path& assign(Source const& source)
{
this->path_.clear();
internals::source_converter<
typename internals::source_traits<Source>::value_type,
path_type::value_type>::append_source(this->path_, source);
return *this;
}
template <typename Iterator, typename = enable_if_pathable<Iterator>>
path& assign(Iterator first, Iterator last)
{
this->path_.clear();
internals::source_converter<
typename std::iterator_traits<Iterator>::value_type,
path_type::value_type>::append_range(this->path_, first, last);
return *this;
}
// Concatenation
// =============
path& operator/=(path const& p);
template <typename Source, typename = enable_if_pathable<Source>>
path& append(Source const& source)
{
return this->operator/=(path(source));
}
template <typename Source>
path& operator/=(Source const& source)
{
return this->append(source);
}
template <typename Iterator, typename = enable_if_pathable<Iterator>>
path& append(Iterator first, Iterator last)
{
return this->operator/=(path(first, last));
}
path& operator+=(path const& p)
{
this->path_ += p.path_;
return *this;
}
path& operator+=(string_type const& str)
{
this->path_ +=
internals::string_converter<value_type>::to<path_type::value_type>(str);
return *this;
}
path& operator+=(cm::string_view str)
{
this->path_.append(str.begin(), str.end());
return *this;
}
path& operator+=(value_type const* str)
{
this->path_ +=
internals::string_converter<value_type>::to<path_type::value_type>(str);
return *this;
}
path& operator+=(value_type const c)
{
this->path_ +=
internals::string_converter<value_type>::to<path_type::value_type>(c);
return *this;
}
template <typename Source, typename = enable_if_pathable<Source>>
path& concat(Source const& source)
{
internals::source_converter<
typename internals::source_traits<Source>::value_type,
path_type::value_type>::append_source(this->path_, source);
return *this;
}
template <typename Source>
path& operator+=(Source const& source)
{
return this->concat(source);
}
template <typename Iterator, typename = enable_if_pathable<Iterator>>
path& concat(Iterator first, Iterator last)
{
internals::source_converter<
typename std::iterator_traits<Iterator>::value_type,
path_type::value_type>::append_range(this->path_, first, last);
return *this;
}
// Modifiers
// =========
void clear() noexcept { this->path_.clear(); }
path& make_preferred()
{
# if defined(_WIN32) && !defined(__CYGWIN__)
std::replace(
this->path_.begin(), this->path_.end(), '/',
static_cast<path_type::value_type>(this->preferred_separator));
# endif
return *this;
}
path& remove_filename()
{
auto fname = this->get_filename();
if (!fname.empty()) {
this->path_.erase(fname.data() -
// Avoid C++17 non-const .data() that may reallocate.
static_cast<path_type const&>(this->path_).data());
}
return *this;
}
path& replace_filename(path const& replacement)
{
this->remove_filename();
this->operator/=(replacement);
return *this;
}
path& replace_extension(path const& replacement = path())
{
auto ext = this->get_filename_fragment(filename_fragment::extension);
if (!ext.empty()) {
this->path_.erase(ext.data() -
// Avoid C++17 non-const .data() that may reallocate.
static_cast<path_type const&>(this->path_).data());
}
if (!replacement.path_.empty()) {
if (replacement.path_[0] != '.') {
this->path_ += '.';
}
this->path_.append(replacement.path_);
}
return *this;
}
void swap(path& other) noexcept { this->path_.swap(other.path_); }
// Format observers
// ================
string_type const& native() const noexcept
{
# if defined(_WIN32) && !defined(__CYGWIN__)
this->native_path_ = internals::string_converter<
path_type::value_type>::to<string_type::value_type>(this->path_);
return this->native_path_;
# else
return this->path_;
# endif
}
value_type const* c_str() const noexcept { return this->native().c_str(); }
operator string_type() const { return this->native(); }
template <
typename Char, typename Traits = std::char_traits<Char>,
typename Alloc = std::allocator<Char>,
cm::enable_if_t<(std::is_same<Char, char>::value &&
std::is_same<Traits, std::char_traits<char>>::value) ||
(std::is_same<Char, wchar_t>::value &&
std::is_same<Traits, std::char_traits<wchar_t>>::value),
int> = 1>
std::basic_string<Char, Traits, Alloc> string(Alloc const& a = Alloc()) const
{
return internals::string_converter<path_type::value_type>::to<Char, Traits,
Alloc>(
this->path_, a);
}
std::string string() const { return this->path_; }
std::wstring wstring() const
{
return internals::string_converter<path_type::value_type>::to<
std::wstring::value_type>(this->string());
}
std::string u8string() const { return this->path_; }
template <
typename Char, typename Traits = std::char_traits<Char>,
typename Alloc = std::allocator<Char>,
cm::enable_if_t<(std::is_same<Char, char>::value &&
std::is_same<Traits, std::char_traits<char>>::value) ||
(std::is_same<Char, wchar_t>::value &&
std::is_same<Traits, std::char_traits<wchar_t>>::value),
int> = 1>
std::basic_string<Char, Traits, Alloc> generic_string(
Alloc const& a = Alloc()) const
{
return internals::string_converter<path_type::value_type>::to<Char, Traits,
Alloc>(
this->get_generic(), a);
}
std::string generic_string() const { return this->get_generic(); }
std::wstring generic_wstring() const
{
return internals::string_converter<path_type::value_type>::to<
std::wstring::value_type>(this->generic_string());
}
std::string generic_u8string() const { return this->get_generic(); }
// Compare
// =======
int compare(path const& p) const noexcept
{
return this->compare_path(p.path_);
}
int compare(string_type const& str) const
{
return this->compare_path(
internals::string_converter<value_type>::to<path_type::value_type>(str));
}
int compare(value_type const* str) const
{
return this->compare_path(
internals::string_converter<value_type>::to<path_type::value_type>(str));
}
int compare(cm::string_view str) const { return this->compare_path(str); }
// Generation
// ==========
path lexically_normal() const;
path lexically_relative(path const& base) const;
path lexically_proximate(path const& base) const
{
path result = this->lexically_relative(base);
return result.empty() ? *this : result;
}
// Decomposition
// =============
path root_name() const { return get_root_name(); }
path root_directory() const { return this->get_root_directory(); }
path root_path() const
{
return this->root_name().append(this->get_root_directory());
}
path relative_path() const { return this->get_relative_path(); }
path parent_path() const { return this->get_parent_path(); }
path filename() const { return this->get_filename(); }
path stem() const
{
return this->get_filename_fragment(filename_fragment::stem);
}
path extension() const
{
return this->get_filename_fragment(filename_fragment::extension);
}
// Queries
// =======
bool empty() const noexcept { return this->path_.empty(); }
bool has_root_name() const { return !this->get_root_name().empty(); }
bool has_root_directory() const
{
return !this->get_root_directory().empty();
}
bool has_root_path() const
{
return this->has_root_name() || this->has_root_directory();
}
bool has_relative_path() const { return !this->get_relative_path().empty(); }
bool has_parent_path() const { return !this->get_parent_path().empty(); }
bool has_filename() const { return !this->get_filename().empty(); }
bool has_stem() const
{
return !this->get_filename_fragment(filename_fragment::stem).empty();
}
bool has_extension() const
{
return !this->get_filename_fragment(filename_fragment::extension).empty();
}
bool is_absolute() const
{
# if defined(_WIN32) && !defined(__CYGWIN__)
return this->has_root_name() && this->has_root_directory();
# else
// For CYGWIN, root_name (i.e. //host or /cygdrive/x) is not considered.
// Same as current GNU g++ implementation (9.3).
return this->has_root_directory();
# endif
}
bool is_relative() const { return !this->is_absolute(); }
// Iterators
// =========
inline iterator begin() const;
inline iterator end() const;
// Non-members
// ===========
friend inline bool operator==(path const& lhs, path const& rhs) noexcept
{
return lhs.compare(rhs) == 0;
}
friend inline bool operator!=(path const& lhs, path const& rhs) noexcept
{
return lhs.compare(rhs) != 0;
}
friend inline bool operator<(path const& lhs, path const& rhs) noexcept
{
return lhs.compare(rhs) < 0;
}
friend inline bool operator<=(path const& lhs, path const& rhs) noexcept
{
return lhs.compare(rhs) <= 0;
}
friend inline bool operator>(path const& lhs, path const& rhs) noexcept
{
return lhs.compare(rhs) > 0;
}
friend inline bool operator>=(path const& lhs, path const& rhs) noexcept
{
return lhs.compare(rhs) >= 0;
}
friend inline path operator/(path const& lhs, path const& rhs)
{
path result(lhs);
result /= rhs;
return result;
}
template <typename Char, typename Traits>
friend inline cm::enable_if_t<
(std::is_same<Char, path::value_type>::value &&
std::is_same<Traits, std::char_traits<path::value_type>>::value) ||
(std::is_same<Char, path::path_type::value_type>::value &&
std::is_same<Traits,
std::char_traits<path::path_type::value_type>>::value),
std::basic_ostream<Char, Traits>&>
operator<<(std::basic_ostream<Char, Traits>& os, path const& p)
{
os << cm::quoted(p.string<Char, Traits>());
return os;
}
template <typename Char, typename Traits>
friend inline cm::enable_if_t<
(std::is_same<Char, path::value_type>::value &&
std::is_same<Traits, std::char_traits<path::value_type>>::value) ||
(std::is_same<Char, path::path_type::value_type>::value &&
std::is_same<Traits,
std::char_traits<path::path_type::value_type>>::value),
std::basic_istream<Char, Traits>&>
operator>>(std::basic_istream<Char, Traits>& is, path& p)
{
std::basic_string<Char, Traits> tmp;
is >> cm::quoted(tmp);
p = tmp;
return is;
}
private:
friend class iterator;
friend std::size_t hash_value(path const& p) noexcept;
path_type get_generic() const;
cm::string_view get_root_name() const;
cm::string_view get_root_directory() const;
cm::string_view get_relative_path() const;
cm::string_view get_parent_path() const;
cm::string_view get_filename() const;
cm::string_view get_filename_fragment(filename_fragment fragment) const;
int compare_path(cm::string_view str) const;
path_type path_;
# if defined(_WIN32) && !defined(__CYGWIN__)
mutable string_type native_path_;
# endif
};
class path::iterator
{
public:
using iterator_category = std::bidirectional_iterator_tag;
using value_type = path;
using difference_type = std::ptrdiff_t;
using pointer = path const*;
using reference = path const&;
iterator();
iterator(iterator const& other);
~iterator();
iterator& operator=(iterator const& other);
reference operator*() const { return this->path_element_; }
pointer operator->() const { return &this->path_element_; }
iterator& operator++();
iterator operator++(int)
{
iterator it(*this);
this->operator++();
return it;
}
iterator& operator--();
iterator operator--(int)
{
iterator it(*this);
this->operator--();
return it;
}
private:
friend class path;
friend bool operator==(iterator const&, iterator const&);
iterator(path const* p, bool at_end = false);
path const* path_;
std::unique_ptr<internals::path_parser> parser_;
path path_element_;
};
inline path::iterator path::begin() const
{
return iterator(this);
}
inline path::iterator path::end() const
{
return iterator(this, true);
}
// Non-member functions
// ====================
bool operator==(path::iterator const& lhs, path::iterator const& rhs);
inline bool operator!=(path::iterator const& lhs, path::iterator const& rhs)
{
return !(lhs == rhs);
}
inline void swap(path& lhs, path& rhs) noexcept
{
lhs.swap(rhs);
}
std::size_t hash_value(path const& p) noexcept;
#endif
} // namespace filesystem
} // namespace cm
