SWI-Prolog -- read

Availability:built-in

read_clause(+Stream, -Term, +Options)

Equivalent to read_term/3, but sets options according to the current compilation context and optionally processes comments. Defined options:

syntax_errors(+Atom): See read_term/3, but the default is dec10 (report and restart).
term_position(-TermPos): Same as for read_term/3.
subterm_positions(-TermPos): Same as for read_term/3.
variable_names(-Bindings): Same as for read_term/3.
process_comment(+Boolean): If true (default), call prolog:comment_hook(Comments, TermPos, Term) if this multifile hook is defined (see prolog:comment_hook/3). This is used to drive PlDoc.
comments(-Comments): If provided, unify Comments with the comments encountered while reading Term. This option implies process_comment(false).

The singletons option of read_term/3 is initialised from the active style-checking mode. The module option is initialised to the current compilation module (see prolog_load_context/2).