meta — The Logtalk Handbook v3.47.0 documentation

# `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 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.