boost/fusion/sequence/io/detail/manip.hpp
/*=============================================================================
Copyright (c) 1999-2003 Jeremiah Willcock
Copyright (c) 1999-2003 Jaakko Jarvi
Copyright (c) 2001-2006 Joel de Guzman
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
==============================================================================*/
#if !defined(FUSION_MANIP_05052005_1200)
#define FUSION_MANIP_05052005_1200
#include <boost/config.hpp>
#include <string>
#include <vector>
#include <cctype>
// Tuple I/O manipulators
#define FUSION_GET_CHAR_TYPE(T) typename T::char_type
#define FUSION_GET_TRAITS_TYPE(T) typename T::traits_type
#if defined (BOOST_NO_TEMPLATED_STREAMS)
#define FUSION_STRING_OF_STREAM(Stream) std::string
#else
#define FUSION_STRING_OF_STREAM(Stream) \
std::basic_string< \
FUSION_GET_CHAR_TYPE(Stream) \
, FUSION_GET_TRAITS_TYPE(Stream) \
>
#endif
//$$$ these should be part of the public API$$$
//$$$ rename tuple_open, tuple_close and tuple_delimiter to
// open, close and delimeter and add these synonyms to the
// TR1 tuple module.
namespace boost { namespace fusion
{
namespace detail
{
template <typename Tag>
int get_xalloc_index(Tag* = 0)
{
// each Tag will have a unique index
static int index = std::ios::xalloc();
return index;
}
template <typename Stream, typename Tag, typename T>
struct stream_data
{
struct arena
{
~arena()
{
for (
typename std::vector<T*>::iterator i = data.begin()
; i != data.end()
; ++i)
{
delete *i;
}
}
std::vector<T*> data;
};
static void attach(Stream& stream, T const& data)
{
static arena ar; // our arena
ar.data.push_back(new T(data));
stream.pword(get_xalloc_index<Tag>()) = ar.data.back();
}
static T const* get(Stream& stream)
{
return (T const*)stream.pword(get_xalloc_index<Tag>());
}
};
template <typename Tag, typename Stream>
class string_ios_manip
{
public:
typedef FUSION_STRING_OF_STREAM(Stream) string_type;
typedef stream_data<Stream, Tag, string_type> stream_data_t;
string_ios_manip(Stream& str_)
: stream(str_)
{}
void
set(string_type const& s)
{
stream_data_t::attach(stream, s);
}
void
print(char const* default_) const
{
// print a delimiter
string_type const* p = stream_data_t::get(stream);
if (p)
stream << *p;
else
stream << default_;
}
void
read(char const* default_) const
{
// read a delimiter
string_type const* p = stream_data_t::get(stream);
using namespace std;
ws(stream);
if (p)
{
typedef typename string_type::const_iterator iterator;
for (iterator i = p->begin(); i != p->end(); ++i)
check_delim(*i);
}
else
{
while (*default_)
check_delim(*default_++);
}
}
private:
template <typename Char>
void
check_delim(Char c) const
{
if (!isspace(c))
{
if (stream.get() != c)
{
stream.unget();
stream.setstate(std::ios::failbit);
}
}
}
Stream& stream;
private:
// silence MSVC warning C4512: assignment operator could not be generated
string_ios_manip& operator= (string_ios_manip const&);
};
} // detail
#if defined (BOOST_NO_TEMPLATED_STREAMS)
#define STD_TUPLE_DEFINE_MANIPULATOR(name) \
namespace detail \
{ \
struct name##_tag; \
\
struct name##_type \
{ \
typedef std::string string_type; \
string_type data; \
name##_type(const string_type& d): data(d) {} \
}; \
\
template <typename Stream> \
Stream& operator>>(Stream& s, const name##_type& m) \
{ \
string_ios_manip<name##_tag, Stream>(s).set(m.data); \
return s; \
} \
\
template <typename Stream> \
Stream& operator<<(Stream& s, const name##_type& m) \
{ \
string_ios_manip<name##_tag, Stream>(s).set(m.data); \
return s; \
} \
}
#define STD_TUPLE_DEFINE_MANIPULATOR_FUNCTIONS(name) \
inline detail::name##_type \
name(const std::string& s) \
{ \
return detail::name##_type(s); \
} \
\
inline detail::name##_type \
name(const char* s) \
{ \
return detail::name##_type(std::string(s)); \
} \
\
inline detail::name##_type \
name(char c) \
{ \
return detail::name##_type(std::string(1, c)); \
}
#else // defined(BOOST_NO_TEMPLATED_STREAMS)
#if defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
#define STD_TUPLE_DEFINE_MANIPULATOR_FUNCTIONS(name) \
template <typename Char, typename Traits> \
inline detail::name##_type<Char, Traits> \
name(const std::basic_string<Char, Traits>& s) \
{ \
return detail::name##_type<Char, Traits>(s); \
} \
\
inline detail::name##_type<char> \
name(char const* s) \
{ \
return detail::name##_type<char>(std::basic_string<char>(s)); \
} \
\
inline detail::name##_type<wchar_t> \
name(wchar_t const* s) \
{ \
return detail::name##_type<wchar_t>(std::basic_string<wchar_t>(s)); \
} \
\
inline detail::name##_type<char> \
name(char c) \
{ \
return detail::name##_type<char>(std::basic_string<char>(1, c)); \
} \
\
inline detail::name##_type<wchar_t> \
name(wchar_t c) \
{ \
return detail::name##_type<wchar_t>(std::basic_string<wchar_t>(1, c)); \
}
#else // defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
#define STD_TUPLE_DEFINE_MANIPULATOR_FUNCTIONS(name) \
template <typename Char, typename Traits> \
inline detail::name##_type<Char, Traits> \
name(const std::basic_string<Char, Traits>& s) \
{ \
return detail::name##_type<Char, Traits>(s); \
} \
\
template <typename Char> \
inline detail::name##_type<Char> \
name(Char s[]) \
{ \
return detail::name##_type<Char>(std::basic_string<Char>(s)); \
} \
\
template <typename Char> \
inline detail::name##_type<Char> \
name(Char const s[]) \
{ \
return detail::name##_type<Char>(std::basic_string<Char>(s)); \
} \
\
template <typename Char> \
inline detail::name##_type<Char> \
name(Char c) \
{ \
return detail::name##_type<Char>(std::basic_string<Char>(1, c)); \
}
#endif
#define STD_TUPLE_DEFINE_MANIPULATOR(name) \
namespace detail \
{ \
struct name##_tag; \
\
template <typename Char, typename Traits = std::char_traits<Char> > \
struct name##_type \
{ \
typedef std::basic_string<Char, Traits> string_type; \
string_type data; \
name##_type(const string_type& d): data(d) {} \
}; \
\
template <typename Stream, typename Char, typename Traits> \
Stream& operator>>(Stream& s, const name##_type<Char,Traits>& m) \
{ \
string_ios_manip<name##_tag, Stream>(s).set(m.data); \
return s; \
} \
\
template <typename Stream, typename Char, typename Traits> \
Stream& operator<<(Stream& s, const name##_type<Char,Traits>& m) \
{ \
string_ios_manip<name##_tag, Stream>(s).set(m.data); \
return s; \
} \
} \
#endif // defined(BOOST_NO_TEMPLATED_STREAMS)
STD_TUPLE_DEFINE_MANIPULATOR(tuple_open)
STD_TUPLE_DEFINE_MANIPULATOR(tuple_close)
STD_TUPLE_DEFINE_MANIPULATOR(tuple_delimiter)
STD_TUPLE_DEFINE_MANIPULATOR_FUNCTIONS(tuple_open)
STD_TUPLE_DEFINE_MANIPULATOR_FUNCTIONS(tuple_close)
STD_TUPLE_DEFINE_MANIPULATOR_FUNCTIONS(tuple_delimiter)
#undef STD_TUPLE_DEFINE_MANIPULATOR
#undef STD_TUPLE_DEFINE_MANIPULATOR_FUNCTIONS
#undef FUSION_STRING_OF_STREAM
#undef FUSION_GET_CHAR_TYPE
#undef FUSION_GET_TRAITS_TYPE
}}
#endif