.. index:: help .. _help/0:

.. rst-class:: right

object

help

Command-line help for Logtalk libraries, entities, plus built-in control constructs, predicates, non-terminals, and methods.

| Availability: | logtalk_load(help(loader))

| Author: Paulo Moura | Version: 0:33:0 | Date: 2023-06-01

| Compilation flags: | static, context_switching_calls, complements(allow)

| Implements: | public :ref:`forwarding <forwarding/0>` | Uses: | :ref:`atom <atom/0>` | :ref:`os <os/0>` | :ref:`user <user/0>`

| Remarks: | (none)

| Inherited public predicates: |  :ref:`help_info_support/0::apis/0`  :ref:`help_info_support/0::apis/1`  :ref:`forwarding/0::forward/1`  :ref:`help_info_support/0::handbook/0`  :ref:`help_info_support/0::handbook/1`  :ref:`help_info_support/0::man/1`  

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

Public predicates

.. index:: help/0 .. _help/0::help/0:

help/0 ^^^^^^^^^^

Prints instructions on how to use the help tool.

| Compilation flags: | static

| Mode and number of proofs: | help - one

---

.. index:: (/)/2 .. _help/0::(/)/2:

(/)/2 ^^^^^^^^^

Provides help on the Functor/Arity built-in control construct, directive, predicate, or method.

| Compilation flags: | static

| Template: | Functor/Arity | Mode and number of proofs: | +atom/ +integer - zero_or_one

---

.. index:: (//)/2 .. _help/0::(//)/2:

(//)/2 ^^^^^^^^^^

Provides help on the Functor//Arity built-in non-terminal.

| Compilation flags: | static

| Template: | Functor//Arity | Mode and number of proofs: | +atom// +integer - zero_or_one

---

.. index:: completion/2 .. _help/0::completion/2:

completion/2 ^^^^^^^^^^^^^^^^

Provides a completion pair, Completion-Page, for a given prefix.

| Compilation flags: | static

| Template: | completion(Prefix,Completion) | Mode and number of proofs: | completion(+atom,-pair) - zero_or_more

---

.. index:: completions/2 .. _help/0::completions/2:

completions/2 ^^^^^^^^^^^^^^^^^

Provides a list of completions pairs, Completion-Page, for a given prefix.

| Compilation flags: | static

| Template: | completions(Prefix,Completions) | Mode and number of proofs: | completions(+atom,-lists(pair)) - zero_or_more

---

.. index:: built_in_directive/4 .. _help/0::built_in_directive/4:

built_in_directive/4 ^^^^^^^^^^^^^^^^^^^^^^^^

Provides access to the HTML documenting files describing built-in directives.

| Compilation flags: | static

| Template: | built_in_directive(Functor,Arity,Directory,Basename) | Mode and number of proofs: | built_in_directive(?atom,?integer,-atom,-atom) - zero_or_more

---

.. index:: built_in_predicate/4 .. _help/0::built_in_predicate/4:

built_in_predicate/4 ^^^^^^^^^^^^^^^^^^^^^^^^

Provides access to the HTML documenting files describing built-in predicates.

| Compilation flags: | static

| Template: | built_in_predicate(Functor,Arity,Directory,Basename) | Mode and number of proofs: | built_in_predicate(?atom,?integer,-atom,-atom) - zero_or_more

---

.. index:: built_in_method/4 .. _help/0::built_in_method/4:

built_in_method/4 ^^^^^^^^^^^^^^^^^^^^^

Provides access to the HTML documenting files describing built-in methods.

| Compilation flags: | static

| Template: | built_in_method(Functor,Arity,Directory,Basename) | Mode and number of proofs: | built_in_method(?atom,?integer,-atom,-atom) - zero_or_more

---

.. index:: control_construct/4 .. _help/0::control_construct/4:

control_construct/4 ^^^^^^^^^^^^^^^^^^^^^^^

Provides access to the HTML documenting files describing built-in control constructs.

| Compilation flags: | static

| Template: | control_construct(Functor,Arity,Directory,Basename) | Mode and number of proofs: | control_construct(?atom,?integer,-atom,-atom) - zero_or_more

---

.. index:: built_in_non_terminal/4 .. _help/0::built_in_non_terminal/4:

built_in_non_terminal/4 ^^^^^^^^^^^^^^^^^^^^^^^^^^^

Provides access to the HTML documenting files describing built-in DCG non-terminals.

| Compilation flags: | static

| Template: | built_in_non_terminal(Functor,Arity,Directory,Basename) | Mode and number of proofs: | built_in_non_terminal(?atom,?integer,-atom,-atom) - zero_or_more

---

.. index:: library/0 .. _help/0::library/0:

library/0 ^^^^^^^^^^^^^

Provides help on the standard Logtalk library.

| Compilation flags: | static

| Mode and number of proofs: | library - one

---

.. index:: library/1 .. _help/0::library/1:

library/1 ^^^^^^^^^^^^^

Provides help on the standard Logtalk libraries, library predicates, and library non-terminals.

| Compilation flags: | static

| Template: | library(Topic) | Mode and number of proofs: | library(+atom) - zero_or_one | library(+predicate_indicator) - zero_or_one | library(+non_terminal_indicator) - zero_or_one

---

.. index:: entity/1 .. _help/0::entity/1:

entity/1 ^^^^^^^^^^^^

Provides help on Logtalk entities (objects, protocols, or categories).

| Compilation flags: | static

| Template: | entity(Entity) | Mode and number of proofs: | entity(+entity_identifier) - zero_or_one

---

.. index:: manuals/0 .. _help/0::manuals/0:

manuals/0 ^^^^^^^^^^^^^

Provides access to the Logtalk User and Reference manuals.

| Compilation flags: | static

| Mode and number of proofs: | manuals - one

---

Protected predicates

(no local declarations; see entity ancestors if any)

Private predicates

(no local declarations; see entity ancestors if any)

Operators

(none)