Defined in header <cstdio>
typedef /* implementation-defined */ fpos_t;

std::fpos_t is a non-array complete object type, can be used to store (by std::fgetpos) and restore (by std::fsetpos) the position and multibyte parser state (if any) for a C stream.

The multibyte parser state of a wide-oriented C stream is represented by a std::mbstate_t object, whose value is stored as part of the value of a std::fpos_t object by std::fgetpos.

See also

gets the file position indicator
moves the file position indicator to a specific location in a file
conversion state information necessary to iterate multibyte character strings
represents absolute position in a stream or a file
(class template)
C documentation for fpos_t

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