Re: [boost] tuple benchmarks show marked differences from std::tuple(was Re: Interesting article on stack-based TMP

On Thu, Oct 25, 2012 at 9:58 AM, Larry Evans <cppljevans@suddenlink.net>wrote: [...]

Also, it's not obvious to me why:

static_cast<Tuple &&>(that)

is needed because that has been declared as Tuple &&.

[...] The expression "that" (without quotes) is an lvalue, regardless of the declared type of the variable "that". Same reason that boost::forward/std::forward exists. It's like that (har har) to prevent you from unintentionally moving. - Jeff