They're used to implement perfect forwarding: http://www.open-std.org/jtc1/sc22/... | Hacker News

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lcapaldo on Dec 15, 2011 | parent | context | favorite | on: Understanding lvalues and rvalues in C and C++

They're used to implement perfect forwarding: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2002/n138...

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