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fix nth_instance: fix bugs and actually add two versions (obs from Theofrastos Mantadelis)

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Vítor Manuel de Morais Santos Costa
2009-11-18 13:06:37 +00:00
parent f31aeff952
commit a316090f8c
4 changed files with 40 additions and 21 deletions
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31
docs/yap.tex
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@@ -5966,16 +5966,6 @@ elements of the internal data-base that match the key.
match the reference.
@end itemize
@item nth_instance(?@var{K},?@var{Index},@var{T},?@var{R})
@findex nth_recorded/3
@saindex nth_recorded/3
@cnindex nth_recorded/3
Fetches the @var{Index}nth entry in the internal database under the
key @var{K}. Entries are numbered from one. If the key @var{K} are the
@var{Index} are bound, a reference is unified with @var{R}. Otherwise,
the reference @var{R} must be given, and the term the system will find
the matching key and index.
@item erase(+@var{R})
@findex erase/1
@saindex erase/1
@@ -6015,6 +6005,27 @@ Defines the relation: @var{K} is a currently defined database key whose
name is the atom @var{A}. It can be used to generate all the keys for
the internal data-base.
@item nth_instance(?@var{Key},?@var{Index},?@var{R})
@findex nth_instance/3
@saindex nth_instance/3
@cnindex nth_instance/3
Fetches the @var{Index}nth entry in the internal database under the key
@var{Key}. Entries are numbered from one. If the key @var{Key} or the
@var{Index} are bound, a reference is unified with @var{R}. Otherwise,
the reference @var{R} must be given, and YAP will find
the matching key and index.
@item nth_instance(?@var{Key},?@var{Index},@var{T},?@var{R})
@findex nth_instance/4
@saindex nth_instance/4
@cnindex nth_instance/4
Fetches the @var{Index}nth entry in the internal database under the key
@var{Key}. Entries are numbered from one. If the key @var{Key} or the
@var{Index} are bound, a reference is unified with @var{R}. Otherwise,
the reference @var{R} must be given, and YAP will find
the matching key and index.
@item key_statistics(+@var{K},-@var{Entries},-@var{Size},-@var{IndexSize})
@findex key_statistics/4
@snindex key_statistics/4