.. index:: coroutining .. _coroutining/0:

.. rst-class:: right

object

coroutining

Coroutining predicates.

| Availability: | logtalk_load(coroutining(loader))

| Author: Paulo Moura | Version: 0:5:0 | Date: 2021-12-17

| Compilation flags: | static, context_switching_calls

| Dependencies: | (none)

| Remarks:

• Supported backend Prolog systems: ECLiPSe, XVM, SICStus Prolog, SWI-Prolog, Trealla Prolog, and YAP.

| Inherited public predicates: | (none)

.. contents:: :local: :backlinks: top

Public predicates

.. index:: dif/2 .. _coroutining/0::dif/2:

dif/2 ^^^^^^^^^

Sets a constraint that is true iff the two terms are different.

| Compilation flags: | static

| Template: | dif(Term1,Term2) | Mode and number of proofs: | dif(+term,+term) - zero_or_one

---

.. index:: dif/1 .. _coroutining/0::dif/1:

dif/1 ^^^^^^^^^

Sets a set of constraints that are true iff all terms in a list are different.

| Compilation flags: | static

| Template: | dif(Terms) | Mode and number of proofs: | dif(+list(term)) - zero_or_one

---

.. index:: freeze/2 .. _coroutining/0::freeze/2:

freeze/2 ^^^^^^^^^^^^

Delays the execution of a goal until a variable is bound.

| Compilation flags: | static

| Template: | freeze(Variable,Goal) | Meta-predicate template: | freeze(*,0) | Mode and number of proofs: | freeze(+term,+callable) - zero_or_more

---

.. index:: frozen/2 .. _coroutining/0::frozen/2:

frozen/2 ^^^^^^^^^^^^

Unifies Goal with the goal delayed by Variable. When no goals are frozen on Variable, Goal is unified with true.

| Compilation flags: | static

| Template: | frozen(Variable,Goal) | Mode and number of proofs: | frozen(@var,--callable) - one

---

.. index:: when/2 .. _coroutining/0::when/2:

when/2 ^^^^^^^^^^

Calls Goal when Condition becomes true. The portable conditions are: nonvar/1, ground/1, (,)/2, and (;)/2.

| Compilation flags: | static

| Template: | when(Condition,Goal) | Meta-predicate template: | when(*,0) | Mode and number of proofs: | when(+callable,+callable) - zero_or_more

---

Protected predicates

(none)

Private predicates

(none)

Operators

(none)