## 4.15.1. Wide Characters

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A new datatype, MPI_WCHAR, is added, for the purpose of dealing with international character sets such as Unicode.

MPI_WCHAR is a C type that corresponds to the type `wchar_t` defined in `<stddef.h>`. There are no predefined reduction operations for MPI_WCHAR.

Rationale.

The fact that MPI_CHAR is associated with the C datatype `char`, which in turn is often used as a substitute for the ``missing'' `byte` datatype in C makes it most natural to define this as a new datatype specifically for multi-byte characters. ( End of rationale.)

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MPI-2.0 of July 18, 1997
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