Prolog Language Definite Clause Grammars (DCGs) Anything at all: `... //0`
Example
One of the most elementary DCG nonterminals is ... //0, which can be read as "anything at all":
... --> [] | [_], ... .
It can be used to describe a list Ls that contains the element E via:
phrase(( ..., [E], ... ), Ls)
