std::wcostream
is a class in the C++ standard library that represents an output stream that writes wide-character data to a file or device. It is similar to std::wofstream
, but with the addition of support for localized formatting and output encoding conversion. The wcostream
class is a part of the <iostream>
header in C++.
std::wcostream
can be constructed in a similar way to other C++ output streams, such as std::ofstream
. It exposes methods for writing wide-character data to the stream, such as put
, write
, and operator<<
. It also supports the insertion operator (<<
) with manipulators like std::setw
, std::setfill
, and std::setprecision
for formatting.
The character encoding used by the wcostream
can be specified by setting a locale for the stream. The stream will then perform encoding and decoding of characters to and from the specified encoding as needed. This allows for seamless output of multi-byte characters and strings to a variety of output devices and files that may not use the same encoding as the program.
Overall, std::wcostream
provides a convenient way to output wide-character data to files and devices, with support for localization and encoding conversion. It is a useful tool for text-based programs that need to work with non-ASCII character sets and multi-byte encodings.
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