apply_eval¶
Header¶
#include <boost/hof/apply_eval.hpp>
Description¶
The apply_eval
function work like apply
, except it calls
eval
on each of its arguments. Each eval
call is
always ordered from left-to-right.
Synopsis¶
template<class F, class... Ts>
constexpr auto apply_eval(F&& f, Ts&&... xs);
Semantics¶
assert(apply_eval(f)(xs...) == f(eval(xs)...));
Example¶
#include <boost/hof.hpp>
#include <cassert>
struct sum_f
{
template<class T, class U>
T operator()(T x, U y) const
{
return x+y;
}
};
int main() {
assert(boost::hof::apply_eval(sum_f(), []{ return 1; }, []{ return 2; }) == 3);
}