Input stream line position and read term start and end lines

As a future enhancement, it would be quite useful if we could call the stream_property/2 predicate to get the current line and if the read_term/3 predicate could support an option to get the term start and ending lines. In my particular case, Logtalk uses these features to pinpoint warnings and errors when compiling a file. When we use the sandbox in the Tau Prolog website, warnings and errors tell us the source file line number. Thus, I assume the some of the necessary bits to support these features are already present internally?

[jariazavalverde]

Thanks. Fixed!

[jariazavalverde]

Added stream_position_data/3 built-in predicate.

stream_position_data(?Field, +Pos, -Data). Field is one of line_count, line_position or char_count.