CODEWITHSUNDEEP
c++c++11rvalue-reference
a.lasram
a.lasram

Reputation: 4411

Why can an rvalue reference bind to a function?

The following is valid c++

void g() {}
void (&&r)(void) = g;

See "Can an rvalue reference bind to a function?" thread for details.

My question is: What is the reason that made this possible?

Upvotes: 2

Views: 172

Answers (1)

Ben Voigt
Ben Voigt

Reputation: 283971

I suspect that it is to provide consistency between plain functions and function objects (including lambdas).

If you make a copy of a pointer or reference to a plain function, the state (static locals) is shared, which is somewhat the same as moving (leaving the old copy in an indeterminate but valid state).

Upvotes: 2

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