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[forwardlist.ops,list.ops] Fix specification of 'unique' LWG2997 #4465

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[forwardlist.ops,list.ops] Fix specification of 'unique' LWG2997 #4465

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22 changes: 14 additions & 8 deletions source/containers.tex
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Original file line number Diff line number Diff line change
Expand Up @@ -4724,10 +4724,12 @@
\begin{itemdescr}
\pnum
\effects
Erases all but the first element from every consecutive
group of equal elements referred to by the iterator \tcode{i} in the range \range{first +
1}{last} for which \tcode{*i == *(i-1)} (for the version with no arguments) or \tcode{pred(*i,
*(i - 1))} (for the version with a predicate argument) holds.
Erases all but the first element from every consecutive group of equal elements.
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See #4221 (comment) w.r.t "every consecutive group".

That is, for a nonempty list,
erases all elements referred to by the iterator \tcode{i}
in the range \range{begin() + 1}{end()}
for which \tcode{*i == *(i-1)} (for the version with no arguments) or
\tcode{pred(*i, *(i - 1))} (for the version with a predicate argument) holds.
Invalidates only the iterators and references to the erased elements.

\pnum
Expand Down Expand Up @@ -5416,10 +5418,14 @@
\pnum
\effects
Erases all but the first element from every
consecutive group of equal elements referred to by the iterator \tcode{i} in the range
\range{first + 1}{last} for which \tcode{*i == *(i-1)} (for the version of
\tcode{unique} with no arguments) or \tcode{pred(*i, *(i - 1))} (for the version of
\tcode{unique} with a predicate argument) holds.
consecutive group of equal elements.
That is, for a nonempty list,
erases all elements referred to
by the iterator \tcode{i} in the range \range{begin() + 1}{end()} for which
\tcode{*i == *(i-1)}
(for the version of \tcode{unique} with no arguments) or
\tcode{pred(*i, *(i - 1))}
(for the version of \tcode{unique} with a predicate argument) holds.
Invalidates only the iterators and references to the erased elements.

\pnum
Expand Down