Re: [Boost-users] [fusion] nth runtime element of a sequence

On 24 February 2014 14:28, Larry Evans wrote:

On 02/24/14 05:04, Krzysztof Czainski wrote:

...

2014-02-24 11:55 GMT+01:00 MM mailto:finjulhich@gmail.com>:

Hello,

I just wanted to confirm there's no provided method to get the n'th element of say a fusion vector where n is known at runtime, except of handling it explicitkly with a switch case?

Thanks

MM

If such a function existed, what return type would it have?

Regards, Kris

What about: variant get(unsigned n, vector) ? For example:

vector vec(T1(),T2(),T3()); variant var; var = get(2,vec); assert(var.which(),2);

-regards, Larry

Possible, a variant over the unique types in the sequence. What would the impl look like though?

MM