Capturing perfectly-forwarded objects in lambdas -- Vittorio Romeo

Does [x = std::forward<decltype(x)>] behave like you expect?

capturing perfectly-forwarded objects in lambdas

by Vittorio Romeo

From the article:

Perfect forwarding and forwarding references allow developers to write generic template functions that retain the lvalueness/rvalueness of passed arguments [...] Let's try to use auto&&, std::forward and C++14's generalized lambda capture syntax to implement our desired semantics. [...] What we really want to do is:

  • Capture by copy if a is an rvalue reference.
  • Capture by reference if a is an lvalue reference.


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