SWI-Prolog -- stream_position

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Predicate stream_position_data/3

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Availability:built-in

stream_position_data(?Field, +Pos, -Data)

Extracts information from the opaque stream position term as returned by stream_property/2 requesting the position(Pos) property. Field is one of line_count, line_position, char_count or byte_count. See also line_count/2, line_position/2, character_count/2 and byte_count/2.^{103Introduced
in version 5.6.4 after extending the position term with a byte count.
Compatible with SICStus Prolog.}