11.2.12 Hook Predicates

user:breakpoint_expansion(+Macro, -Body) hook,development
defines debugger condition macros
user:debugger_command_hook(+DCommand,-Actions) hook,development
Allows the interactive debugger to be extended with user-defined commands.
user:error_exception(=Exception) hook
Exception is an exception that traps to the debugger if it is switched on.
user:file_search_path(+F,-D) hook
directory D is included in file search path F
foreign(+F,-P)
foreign(+F,-L,-P)
Describes the interface between Prolog and the foreign Routine
foreign_resource(+R,-L)
resource R defines foreign functions in list L
user:generate_message_hook(+M,?S0,?S) hook
A way for the user to override the call to 'SU_messages':generate_message/3 in print_message/2.
goal_expansion(+Term1, +Layout1, +Module, -Term2, -Layout2) hook
Defines transformations on goals while clauses are being compiled or asserted, and during meta-calls.
user:library_directory(-D) hook
D is a library directory that will be searched
user:message_hook(+S,+M,+L) hook
Overrides the call to print_message_lines/3 in print_message/2.
user:portray(+T)
A way for the user to over-ride the default behavior of print/1.
user:portray_message(+S,+M) hook
Tells print_message/2 what to do.
user:query_hook(+QueryClass, +Query, +QueryLines, +Help, +HelpLines, -Answer) hook
Called by ask_query/4 before processing the query. If this predicate succeeds, it is assumed that the query has been processed and nothing further is done.
user:query_class_hook(+QueryClass, -Prompt, -InputMethod, -MapMethod, -FailureMode) hook
Provides the user with a method of overriding the call to 'SU_messages':query_class/5 in the preparation phase of query processing. This way the default query class characteristics can be changed.
user:query_input_hook(+InputMethod, +Prompt, -RawInput) hook
Provides the user with a method of overriding the call to 'SU_messages':query_input/3 in the input phase of query processing. This way the implementation of the default input methods can be changed.
user:query_map_hook(+MapMethod, +RawInput, -Result, -Answer) hook
Provides the user with a method of overriding the call to 'SU_messages':query_map/4 in the mapping phase of query processing. This way the implementation of the default map methods can be changed.
user:runtime_entry(+M) hook
This predicate is called upon start-up and exit of stand alone applications.
user:term_expansion(+Term1, +Layout1, +Tokens1, -Term2, -Layout2, -Tokens2) hook
Overrides or complements the standard transformations to be done by expand_term/2.
user:unknown_predicate_handler(+G,+M,-N) hook
hook to trap calls to unknown predicates

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