96 lines
2.4 KiB
C++
96 lines
2.4 KiB
C++
|
//-----------------------------------------------------------------------------
|
||
|
|
// boost variant/detail/variant_io.hpp header file
|
||
|
|
// See http://www.boost.org for updates, documentation, and revision history.
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Copyright (c) 2002-2003
|
||
|
|
// Eric Friedman, Itay Maman
|
||
|
|
//
|
||
|
|
// 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)
|
||
|
|
|
||
|
|
#ifndef BOOST_VARIANT_DETAIL_VARIANT_IO_HPP
|
||
|
|
#define BOOST_VARIANT_DETAIL_VARIANT_IO_HPP
|
||
|
|
|
||
|
|
#include <iosfwd> // for std::basic_ostream forward declare
|
||
|
|
|
||
|
|
#include <boost/variant/variant_fwd.hpp>
|
||
|
|
|
||
|
|
#include <boost/detail/templated_streams.hpp>
|
||
|
|
#include <boost/variant/static_visitor.hpp>
|
||
|
|
|
||
|
|
namespace boost {
|
||
|
|
|
||
|
|
///////////////////////////////////////////////////////////////////////////////
|
||
|
|
// function template operator<<
|
||
|
|
//
|
||
|
|
// Outputs the content of the given variant to the given ostream.
|
||
|
|
//
|
||
|
|
|
||
|
|
// forward declare (allows output of embedded variant< variant< ... >, ... >)
|
||
|
|
template <
|
||
|
|
BOOST_TEMPLATED_STREAM_ARGS(E,T)
|
||
|
|
BOOST_TEMPLATED_STREAM_COMMA
|
||
|
|
BOOST_VARIANT_ENUM_PARAMS(typename U)
|
||
|
|
>
|
||
|
|
inline BOOST_TEMPLATED_STREAM(ostream, E,T)& operator<<(
|
||
|
|
BOOST_TEMPLATED_STREAM(ostream, E,T)& out
|
||
|
|
, const variant< BOOST_VARIANT_ENUM_PARAMS(U) >& rhs
|
||
|
|
);
|
||
|
|
|
||
|
|
namespace detail { namespace variant {
|
||
|
|
|
||
|
|
template <typename OStream>
|
||
|
|
class printer
|
||
|
|
: public boost::static_visitor<>
|
||
|
|
{
|
||
|
|
private: // representation
|
||
|
|
|
||
|
|
OStream& out_;
|
||
|
|
|
||
|
|
public: // structors
|
||
|
|
|
||
|
|
explicit printer(OStream& out)
|
||
|
|
: out_( out )
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
public: // visitor interface
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
void operator()(const T& operand) const
|
||
|
|
{
|
||
|
|
out_ << operand;
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
printer& operator=(const printer&);
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
}} // namespace detail::variant
|
||
|
|
|
||
|
|
template <
|
||
|
|
BOOST_TEMPLATED_STREAM_ARGS(E,T)
|
||
|
|
BOOST_TEMPLATED_STREAM_COMMA
|
||
|
|
BOOST_VARIANT_ENUM_PARAMS(typename U)
|
||
|
|
>
|
||
|
|
inline BOOST_TEMPLATED_STREAM(ostream, E,T)& operator<<(
|
||
|
|
BOOST_TEMPLATED_STREAM(ostream, E,T)& out
|
||
|
|
, const variant< BOOST_VARIANT_ENUM_PARAMS(U) >& rhs
|
||
|
|
)
|
||
|
|
{
|
||
|
|
detail::variant::printer<
|
||
|
|
BOOST_TEMPLATED_STREAM(ostream, E,T)
|
||
|
|
> visitor(out);
|
||
|
|
|
||
|
|
rhs.apply_visitor(visitor);
|
||
|
|
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace boost
|
||
|
|
|
||
|
|
#endif // BOOST_VARIANT_DETAIL_VARIANT_IO_HPP
|