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[/
Copyright (c) Vladimir Batov 2009-2022
Distributed under the Boost Software License, Version 1.0.
See copy at http://www.boost.org/LICENSE_1_0.txt.
]
[import ../example/lexical_cast.cpp]
[section:lexical_cast_converter ['boost::cnv::lexical_cast] Converter]
The purpose of the converter is to
* Make use of the `boost::lexical_cast` functionality and performance that many people have become accustomed to and comfortable with;
* Demonstrate how existing independent conversion\/transformation-related facilities might be incorporated in to the ['Boost.Convert] framework.
The converter can easily replace `boost::lexical_cast`, adding flexibility and convenience:
[lexical_cast_headers1]
[lexical_cast_example1]
See the [classref boost::cnv::lexical_cast `boost::cnv::lexical_cast` implementation] for details.
In order for a user-defined type to be integrated into the `boost::lexical_cast` framework and, consequently, deployed with the `boost::cnv::lexical_cast` converter:
* ['TypeOut] needs to be [@http://en.cppreference.com/w/cpp/named_req/CopyConstructible ['Copy Constructible]];
* ['TypeOut] needs to be [@http://en.cppreference.com/w/cpp/named_req/DefaultConstructible ['Default Constructible]];
* ['TypeOut] needs to be ['Input Streamable];
* ['TypeIn] needs to be ['Output Streamable].
The first two requirements are imposed by the `boost::lexical_cast` design and implementation and the last two requirements by the underlying `std::stringstream` engine.
[endsect]
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