Function template argument

boost::yap::argument

Synopsis

// In header: <boost/yap/algorithm.hpp>


template<long long I, typename Expr> 
  decltype(auto) argument(Expr && expr, hana::llong< I > i);

Returns the i-th argument expression in a call expression.

Equivalent to get(expr, i + 1).

	Note
	`argument()` is only valid if Expr is an `expr_kind::call` expression.