[diff.cpp17.containers] (original) (raw)

Affected subclauses: [forward.list] and [list]

Change: Return types of remove, remove_if, and uniquechanged from void to container​::​size_type.

Rationale: Improve efficiency and convenience of finding number of removed elements.

Effect on original feature: Code that depends on the return types might have different semantics in this revision of C++.

Translation units compiled against this version of C++ may be incompatible with translation units compiled against C++ 2017, either failing to link or having undefined behavior.