cppdraft_translate/cppdraft/istream/rvalue.md

[istream.rvalue]

31 Input/output library [input.output]

31.7 Formatting and manipulators [iostream.format]

31.7.5 Input streams [input.streams]

31.7.5.6 Rvalue stream extraction [istream.rvalue]

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template<class Istream, class T> Istream&& operator>>(Istream&& is, T&& x);

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Constraints: The expression is >> std​::​forward(x) is well-formed when treated as an unevaluated operand andIstream is publicly and unambiguously derived from ios_base.

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Effects: Equivalent to:is >> std::forward(x);return std::move(is);