Higher-order support

Executes goal G, restricting the scope of the cuts to the execution of G. Equivalent to writing a variable G in a goal position.

Usage:ISO

• The following properties should hold at call time:
  (basic_props:cgoal/1)G is a term which represents a goal, i.e., an atom or a structure.
• The following properties hold globally:
  (basic_props:native/1)This predicate is understood natively by CiaoPP.

There exists a set of builtin predicates of the form call/N with N > 1 which execute predicate Pred given arguments Arg1 ... ArgX. If Pred has already arguments Arg1 is added to the start, the rest to the end. This predicate, when Pred is a variable, can be written using the special Ciao syntax Pred(Arg1,...,ArgX).

Usage:

• Call and exit should be compatible with:
  (basic_props:term/1)Arg1 is any term.
• The following properties should hold at call time:
  (basic_props:cgoal/1)Pred is a term which represents a goal, i.e., an atom or a structure.
• The following properties should hold upon exit:
  (basic_props:term/1)Arg1 is any term.
• The following properties should hold globally:
  (basic_props:native/1)This predicate is understood natively by CiaoPP.

Usage:

• The following properties should hold at call time:
  (basic_props:cgoal/1)Arg1 is a term which represents a goal, i.e., an atom or a structure.

Usage:

• The following properties should hold at call time:
  (basic_props:cgoal/1)Arg1 is a term which represents a goal, i.e., an atom or a structure.

Usage:$meta_call(A)

• The following properties should hold at call time:
  (term_typing:nonvar/1)A is currently a term which is not a free variable.
  (basic_props:cgoal/1)A is a term which represents a goal, i.e., an atom or a structure.
• The following properties hold globally:
  (basic_props:native/2)This predicate is understood natively by CiaoPP as call(A).

Usage:$meta_exp(Metatype,P,E)

Unify E with the metaexpansion of P with metatype Metatype (using static metaexpansion when possible and dynamic metaexpansion when necessary)

• The following properties should hold at call time:
  (term_typing:nonvar/1)Metatype is currently a term which is not a free variable.
  (term_typing:nonvar/1)P is currently a term which is not a free variable.
  (term_typing:var/1)E is a free variable.

Usage:this_module(Module)

Module is the internal module identifier for current module.

• The following properties hold upon exit:
  (basic_props:internal_module_id/1)Module is an internal module identifier