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<codecvt>

Defines several template classes that describe objects based on template class codecvt. These objects can serve as locale facets that control conversions between a sequence of values of type Elem and a sequence of values of type char.

#include <codecvt>

The locale facets declared in this header convert between several character encodings. For wide characters (stored within the program in fixed-size integers):

  • UCS-4 is Unicode (ISO 10646) encoded within the program

  • UCS-4 is Unicode (ISO 10646) encoded within the program as a 32-bit integer.

  • UCS-2 is Unicode encoded within the program

  • UCS-2 is Unicode encoded within the program as a 16-bit integer.

  • UTF-16 is Unicode encoded within the program as either one

  • UTF-16 is Unicode encoded within the program as either one or two 16-bit integers. (Note that this does not meet all the requirements of a valid wide-character encoding for Standard C or Standard C++. Nevertheless it is widely used as such.)

For byte streams (stored in a file, transmitted as a byte sequence, or stored within the program in an array of char):

  • UTF-8 is Unicode encoded

  • UTF-8 is Unicode encoded within a byte stream as one or more eight-bit bytes with a deterministic byte order.

  • UTF-16LE is Unicode encoded

  • UTF-16LE is Unicode encoded within a byte stream as UTF-16 with each 16-bit integer presented as two eight-bit bytes, less significant byte first.

  • UTF-16BE is Unicode encoded

  • UTF-16BE is Unicode encoded within a byte stream as UTF-16 with each 16-bit integer presented as two eight-bit bytes, more significant byte first.

Header: <codecvt>

Namespace: stdt

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