Message Handling Predicates

print_message(+Severity, +Message) hookable: Portrays or else writes Message of a given Severity on the standard error stream.
portray_message(+Severity, +Message) hook
user:portray_message(+Severity, +Message): Tells print_message/2 what to do.
generate_message_hook(+Message, -L0, -L) hook
user:generate_message_hook(+Message, -L0, -L): A way for the user to override the call to 'SU_messages':generate_message/3 in the message generation phase in print_message/2.
'SU_messages':generate_message(+Message, -L0, -L) extendible: Predefined message generation rules.
message_hook(+Severity, +Message, +Lines) hook
user:message_hook(+Severity, +Message, +Lines): Overrides the call to print_message_lines/3 in print_message/2. A way for the user to intercept the abstract message term Message of type Severity, whose translation is Lines, before it is actually printed.
print_message_lines(+Stream, +Severity, +Lines): Print the Lines to Stream, preceding each line with a prefix defined by Severity.
goal_source_info(+AGoal, -Goal, -SourceInfo): Decomposes the annotated goal AGoal into a Goal proper and the SourceInfo descriptor term, indicating the source position of the goal.