This module emulates the XSB dedicated term writing predicates from the standard module.

Compatibility

- XSB has a number of additional streams which we do not have. For now we send all messages to user_error. Onlt warning/1 is redirected through SWI-Prolog's print_message/2 interface.

 error_write(@Term) is det

 error_writeln(@Term) is det

As write/1 and writeln/1 to user_error.

 console_write(@Term) is det

 console_writeln(@Term) is det

As write/1 and writeln/1 to user_error. The XSB version writes to STDFDBK. What does that mean?

 warning(@Message) is det

Print a warning. The behaviour depends on the flag warning_action, which can be one of:

print_warning

Re-direct the message to SWI-Prolog's print_message

error_warning

Throw error(xsb_warning(Message), _)

silent_warning

Ignore the warning.

If Message is a list or comma-list, the elements are concatenated without a space.

 message(@Message) is det

 messageln(@Message) is det

Write message to user_error. As warning/1, Message can be a list or comma list.

Compatibility

- XSB. XSB writes to STDMSG. Possibly we should also redirect this through SWI-Prolog's print_message/2 interface.

Undocumented predicates

The following predicates are exported, but not or incorrectly documented.

 messageln(Arg1)

 error_writeln(Arg1)

 console_writeln(Arg1)