.. _library_meta:

meta

This library provides implementations of common meta-predicates. The meta object implements common meta-predicates like map/3 and fold_left/4.

See also the meta_compiler library, which provides optimized compilation of meta-predicate calls.

API documentation

Open the `../../docs/library_index.html#meta <../../docs/library_index.html#meta>`__ link in a web browser.

Loading

To load the main entities in this library, load the loader.lgt file:

::

| ?- logtalk_load(meta(loader)).

Testing

To test this library predicates, load the tester.lgt file:

::

| ?- logtalk_load(meta(tester)).

Usage

See e.g. the metapredicates example and unit tests.