call_preprocess(+CHR0, -CHR) is det[private]

Call user chr:preprocess(CHR0, CHR).

 debug_event(+State, +Event)[multifile]

Hook into the CHR debugger. At this moment we will discard CHR events if we are in a Prolog `skip' and we ignore the

 debug_interact(+Event, +Depth, -Command)[multifile]

Hook into the CHR debugger to display Event and ask for the next command to execute. This definition causes the normal Prolog debugger to be used for the standard ports.

 debug_ask_continue(-Command) is semidet[multifile]

Hook to ask for a CHR debug continuation. Must bind Command to one of creep, skip, ancestors, nodebug, abort, fail, break, help or exit.

 chr_residuals// is det[private]

Find the CHR constraints from the store. These are accessible through the nondet predicate current_chr_constraint/1. Doing a findall/4 however would loose the bindings. We therefore rolled findallv/4, which exploits non-backtrackable assignment and realises a copy of the template without disturbing the bindings using this strangely looking construct. Note that the bindings created by the unifications are in New, which is newer then the latest choicepoint and therefore the bindings are not trailed.

duplicate_term(Templ, New),
New = Templ

 in_chr_context is semidet[private]

True if we are expanding into a context where the chr module is loaded.

 term_colours(+Term, -Colours)[private]

Colourisation of a toplevel term as read from the file.

 goal_colours(+Goal, -Colours)[private]

Colouring of special goals.

Re-exported predicates

The following predicates are exported from this file while their implementation is defined in imported modules or non-module files loaded by this module.

 find_chr_constraint(-Constraint) is nondet

True when Constraint is a currently known constraint in any known CHR module.

deprecated

- current_chr_constraint/1 handles modules.

 current_chr_constraint(:Constraint) is nondet

True if Constraint is a constraint associated with the qualified module.

Undocumented predicates

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

 chr_leash(Arg1)

 chr_show_store(Arg1)

 chr_trace

 chr_notrace