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document atomic_list_concat/3 (stolen from SWI).

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Vítor Santos Costa 2010-06-18 00:30:39 +01:00
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docs/yap.tex
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@ -3437,6 +3437,29 @@ the second unifies with the atom obtained by concatenating all the
atomic terms in the first list. The first argument thus may contain
atoms or numbers.
@item atomic_list_concat(?@var{As},+@var{Separator},?@var{A})
@findex atomic_list_concat/3
@snindex atomic_list_concat/3
@cnindex atomic_list_concat/3
Creates an atom just like @code{atomic_list_concat/2}, but inserts
@var{Separator} between each pair of atoms. For example:
@example
?- atomic_list_concat([gnu, gnat], ', ', A).
A = 'gnu, gnat'
@end example
YAP emulates the SWI-Prolog version of this predicate that can also be
used to split atoms by instantiating @var{Separator} and @var{Atom} as
shown below.
@example
?- atomic_list_concat(L, -, 'gnu-gnat').
L = [gnu, gnat]
@end example
@item atom_length(+@var{A},?@var{I}) [ISO]
@findex atom_length/2
@snindex atom_length/2