mirror of
https://github.com/vdemydiuk/mtapi.git
synced 2026-08-07 16:07:53 +00:00
Added thirdparty: boost library
This commit is contained in:
Viacheslav Demydiuk
+267
@@ -0,0 +1,267 @@
|
||||
/*
|
||||
* Copyright Andrey Semashev 2020.
|
||||
* Distributed under the Boost Software License, Version 1.0.
|
||||
* (See accompanying file LICENSE_1_0.txt or copy at
|
||||
* https://www.boost.org/LICENSE_1_0.txt)
|
||||
*/
|
||||
/*!
|
||||
* \file utility/manipulators/optional.hpp
|
||||
* \author Andrey Semashev
|
||||
* \date 12.05.2020
|
||||
*
|
||||
* The header contains implementation of a stream manipulator for inserting an optional value.
|
||||
*/
|
||||
|
||||
#ifndef BOOST_LOG_UTILITY_MANIPULATORS_OPTIONAL_HPP_INCLUDED_
|
||||
#define BOOST_LOG_UTILITY_MANIPULATORS_OPTIONAL_HPP_INCLUDED_
|
||||
|
||||
#include <cstddef>
|
||||
#include <boost/core/enable_if.hpp>
|
||||
#include <boost/type_traits/is_array.hpp>
|
||||
#include <boost/type_traits/is_scalar.hpp>
|
||||
#include <boost/type_traits/conditional.hpp>
|
||||
#include <boost/log/detail/config.hpp>
|
||||
#include <boost/log/detail/is_ostream.hpp>
|
||||
#include <boost/log/detail/header.hpp>
|
||||
|
||||
#ifdef BOOST_HAS_PRAGMA_ONCE
|
||||
#pragma once
|
||||
#endif
|
||||
|
||||
namespace boost {
|
||||
|
||||
BOOST_LOG_OPEN_NAMESPACE
|
||||
|
||||
/*!
|
||||
* Stream manipulator for inserting an optional value.
|
||||
*/
|
||||
template< typename OptionalT, typename NoneT >
|
||||
class optional_manipulator
|
||||
{
|
||||
private:
|
||||
typedef typename conditional<
|
||||
is_scalar< OptionalT >::value,
|
||||
OptionalT,
|
||||
OptionalT const&
|
||||
>::type stored_optional_type;
|
||||
|
||||
typedef typename conditional<
|
||||
is_scalar< NoneT >::value,
|
||||
NoneT,
|
||||
NoneT const&
|
||||
>::type stored_none_type;
|
||||
|
||||
private:
|
||||
stored_optional_type m_optional;
|
||||
stored_none_type m_none;
|
||||
|
||||
public:
|
||||
//! Initializing constructor
|
||||
optional_manipulator(stored_optional_type opt, stored_none_type none) BOOST_NOEXCEPT :
|
||||
m_optional(opt),
|
||||
m_none(none)
|
||||
{
|
||||
}
|
||||
|
||||
//! The method outputs the value, if it is present, otherwise outputs the "none" marker
|
||||
template< typename StreamT >
|
||||
void output(StreamT& stream) const
|
||||
{
|
||||
if (!!m_optional)
|
||||
stream << *m_optional;
|
||||
else
|
||||
stream << m_none;
|
||||
}
|
||||
};
|
||||
|
||||
/*!
|
||||
* Stream manipulator for inserting an optional value. Specialization for no "none" marker.
|
||||
*/
|
||||
template< typename OptionalT >
|
||||
class optional_manipulator< OptionalT, void >
|
||||
{
|
||||
private:
|
||||
typedef typename conditional<
|
||||
is_scalar< OptionalT >::value,
|
||||
OptionalT,
|
||||
OptionalT const&
|
||||
>::type stored_optional_type;
|
||||
|
||||
private:
|
||||
stored_optional_type m_optional;
|
||||
|
||||
public:
|
||||
//! Initializing constructor
|
||||
optional_manipulator(stored_optional_type opt) BOOST_NOEXCEPT :
|
||||
m_optional(opt)
|
||||
{
|
||||
}
|
||||
|
||||
//! The method outputs the value, if it is present
|
||||
template< typename StreamT >
|
||||
void output(StreamT& stream) const
|
||||
{
|
||||
if (!!m_optional)
|
||||
stream << *m_optional;
|
||||
}
|
||||
};
|
||||
|
||||
/*!
|
||||
* Stream output operator for \c optional_manipulator. Outputs the optional value or the "none" marker, if one was specified on manipulator construction.
|
||||
*/
|
||||
template< typename StreamT, typename OptionalT, typename NoneT >
|
||||
inline typename boost::enable_if_c< log::aux::is_ostream< StreamT >::value, StreamT& >::type operator<< (StreamT& strm, optional_manipulator< OptionalT, NoneT > const& manip)
|
||||
{
|
||||
manip.output(strm);
|
||||
return strm;
|
||||
}
|
||||
|
||||
/*!
|
||||
* Optional manipulator generator function.
|
||||
*
|
||||
* \param opt Optional value to output. The optional value must support contextual conversion to \c bool and dereferencing, and its dereferencing result must support stream output.
|
||||
* \param none Marker used to indicate when the value is not present. Optional. If not specified, nothing is output if the value is not present.
|
||||
* \returns Manipulator to be inserted into the stream.
|
||||
*
|
||||
* \note Both \a opt and \a none objects must outlive the created manipulator object.
|
||||
*/
|
||||
template< typename OptionalT, typename NoneT >
|
||||
inline typename boost::enable_if_c<
|
||||
is_scalar< OptionalT >::value && is_scalar< NoneT >::value,
|
||||
optional_manipulator< OptionalT, NoneT >
|
||||
>::type optional_manip(OptionalT opt, NoneT none) BOOST_NOEXCEPT
|
||||
{
|
||||
return optional_manipulator< OptionalT, NoneT >(opt, none);
|
||||
}
|
||||
|
||||
/*!
|
||||
* Optional manipulator generator function.
|
||||
*
|
||||
* \param opt Optional value to output. The optional value must support contextual conversion to \c bool and dereferencing, and its dereferencing result must support stream output.
|
||||
* \param none Marker used to indicate when the value is not present. Optional. If not specified, nothing is output if the value is not present.
|
||||
* \returns Manipulator to be inserted into the stream.
|
||||
*
|
||||
* \note Both \a opt and \a none objects must outlive the created manipulator object.
|
||||
*/
|
||||
template< typename OptionalT, typename NoneT >
|
||||
inline typename boost::enable_if_c<
|
||||
is_scalar< OptionalT >::value && !is_scalar< NoneT >::value,
|
||||
optional_manipulator< OptionalT, NoneT >
|
||||
>::type optional_manip(OptionalT opt, NoneT const& none) BOOST_NOEXCEPT
|
||||
{
|
||||
return optional_manipulator< OptionalT, NoneT >(opt, none);
|
||||
}
|
||||
|
||||
/*!
|
||||
* Optional manipulator generator function.
|
||||
*
|
||||
* \param opt Optional value to output. The optional value must support contextual conversion to \c bool and dereferencing, and its dereferencing result must support stream output.
|
||||
* \param none Marker used to indicate when the value is not present. Optional. If not specified, nothing is output if the value is not present.
|
||||
* \returns Manipulator to be inserted into the stream.
|
||||
*
|
||||
* \note Both \a opt and \a none objects must outlive the created manipulator object.
|
||||
*/
|
||||
template< typename OptionalT, typename NoneElementT, std::size_t N >
|
||||
inline typename boost::enable_if_c<
|
||||
is_scalar< OptionalT >::value,
|
||||
optional_manipulator< OptionalT, NoneElementT* >
|
||||
>::type optional_manip(OptionalT opt, NoneElementT (&none)[N]) BOOST_NOEXCEPT
|
||||
{
|
||||
return optional_manipulator< OptionalT, NoneElementT* >(opt, none);
|
||||
}
|
||||
|
||||
/*!
|
||||
* Optional manipulator generator function.
|
||||
*
|
||||
* \param opt Optional value to output. The optional value must support contextual conversion to \c bool and dereferencing, and its dereferencing result must support stream output.
|
||||
* \param none Marker used to indicate when the value is not present. Optional. If not specified, nothing is output if the value is not present.
|
||||
* \returns Manipulator to be inserted into the stream.
|
||||
*
|
||||
* \note Both \a opt and \a none objects must outlive the created manipulator object.
|
||||
*/
|
||||
template< typename OptionalT, typename NoneT >
|
||||
inline typename boost::enable_if_c<
|
||||
!is_scalar< OptionalT >::value && !is_array< OptionalT >::value && is_scalar< NoneT >::value,
|
||||
optional_manipulator< OptionalT, NoneT >
|
||||
>::type optional_manip(OptionalT const& opt, NoneT none) BOOST_NOEXCEPT
|
||||
{
|
||||
return optional_manipulator< OptionalT, NoneT >(opt, none);
|
||||
}
|
||||
|
||||
/*!
|
||||
* Optional manipulator generator function.
|
||||
*
|
||||
* \param opt Optional value to output. The optional value must support contextual conversion to \c bool and dereferencing, and its dereferencing result must support stream output.
|
||||
* \param none Marker used to indicate when the value is not present. Optional. If not specified, nothing is output if the value is not present.
|
||||
* \returns Manipulator to be inserted into the stream.
|
||||
*
|
||||
* \note Both \a opt and \a none objects must outlive the created manipulator object.
|
||||
*/
|
||||
template< typename OptionalT, typename NoneT >
|
||||
inline typename boost::enable_if_c<
|
||||
!is_scalar< OptionalT >::value && !is_array< OptionalT >::value && !is_scalar< NoneT >::value,
|
||||
optional_manipulator< OptionalT, NoneT >
|
||||
>::type optional_manip(OptionalT const& opt, NoneT const& none) BOOST_NOEXCEPT
|
||||
{
|
||||
return optional_manipulator< OptionalT, NoneT >(opt, none);
|
||||
}
|
||||
|
||||
/*!
|
||||
* Optional manipulator generator function.
|
||||
*
|
||||
* \param opt Optional value to output. The optional value must support contextual conversion to \c bool and dereferencing, and its dereferencing result must support stream output.
|
||||
* \param none Marker used to indicate when the value is not present. Optional. If not specified, nothing is output if the value is not present.
|
||||
* \returns Manipulator to be inserted into the stream.
|
||||
*
|
||||
* \note Both \a opt and \a none objects must outlive the created manipulator object.
|
||||
*/
|
||||
template< typename OptionalT, typename NoneElementT, std::size_t N >
|
||||
inline typename boost::enable_if_c<
|
||||
!is_scalar< OptionalT >::value && !is_array< OptionalT >::value,
|
||||
optional_manipulator< OptionalT, NoneElementT* >
|
||||
>::type optional_manip(OptionalT const& opt, NoneElementT (&none)[N]) BOOST_NOEXCEPT
|
||||
{
|
||||
return optional_manipulator< OptionalT, NoneElementT* >(opt, none);
|
||||
}
|
||||
|
||||
/*!
|
||||
* Optional manipulator generator function.
|
||||
*
|
||||
* \param opt Optional value to output. The optional value must support contextual conversion to \c bool and dereferencing, and its dereferencing result must support stream output.
|
||||
* \returns Manipulator to be inserted into the stream.
|
||||
*
|
||||
* \note \a opt object must outlive the created manipulator object.
|
||||
*/
|
||||
template< typename OptionalT >
|
||||
inline typename boost::enable_if_c<
|
||||
is_scalar< OptionalT >::value,
|
||||
optional_manipulator< OptionalT, void >
|
||||
>::type optional_manip(OptionalT opt) BOOST_NOEXCEPT
|
||||
{
|
||||
return optional_manipulator< OptionalT, void >(opt);
|
||||
}
|
||||
|
||||
/*!
|
||||
* Optional manipulator generator function.
|
||||
*
|
||||
* \param opt Optional value to output. The optional value must support contextual conversion to \c bool and dereferencing, and its dereferencing result must support stream output.
|
||||
* \returns Manipulator to be inserted into the stream.
|
||||
*
|
||||
* \note \a opt object must outlive the created manipulator object.
|
||||
*/
|
||||
template< typename OptionalT >
|
||||
inline typename boost::enable_if_c<
|
||||
!is_scalar< OptionalT >::value && !is_array< OptionalT >::value,
|
||||
optional_manipulator< OptionalT, void >
|
||||
>::type optional_manip(OptionalT const& opt) BOOST_NOEXCEPT
|
||||
{
|
||||
return optional_manipulator< OptionalT, void >(opt);
|
||||
}
|
||||
|
||||
BOOST_LOG_CLOSE_NAMESPACE // namespace log
|
||||
|
||||
} // namespace boost
|
||||
|
||||
#include <boost/log/detail/footer.hpp>
|
||||
|
||||
#endif // BOOST_LOG_UTILITY_MANIPULATORS_OPTIONAL_HPP_INCLUDED_
|
||||
Reference in New Issue
Block a user