built-in method

# `phrase//1`

## Description

    phrase(GrammarRuleBody)

This non-terminal takes a grammar rule body and parses it using the two implicit grammar rule arguments. A common use is to wrap what otherwise would be a naked meta-variable in a grammar rule body when defining a meta non-terminal.

## Meta-non-terminal template

    phrase(0)

## Modes and number of proofs

    phrase(+callable) - zero_or_more

## Errors

`GrammarRuleBody` is a variable:
`instantiation_error`
`GrammarRuleBody` is neither a variable nor a callable term:
`type_error(callable, GrammarRuleBody)`

## Examples

> (none)

See also

call//1-N, phrase/2, phrase/3